87th OCC Minutes 17.07nerpc.nic.in/Minutes/Minutes_OCC/87th_OCC_Minutes_16.07.13.pdf · No....

No. NERPC/SE (O)/OCC/2013/4080-4109 Date: 16th July, 2013 To,

1. Managing Director, AEGCL, Bijuli Bhawan, Guwahati – 781 001 2. Director (Distribution), Me. ECL, Lumjingshai, Short Round Road, Shillong – 793 001 3. Director(Transmission), Me.PTCL, Lumjingshai, Short Round Road, Shillong – 793 001 4. CGM, (LDC), SLDC Complex, AEGCL, Kahelipara, Guwahati-781 019 5. Chief Engineer (WE Zone),Department of Power ,Govt. of Arunachal Pradesh, Itanagar- 791 111 6. Chief Engineer (EE Zone),Department of Power, Govt. of Arunachal Pradesh, Itanagar- 791 111 7. Chief Engineer (TP&MZ),Department of Power, Govt. of Arunachal Pradesh, Itanagar- 791 111 8. Engineer-in-Chief (P&E), Department of Power, Govt. of Mizoram, Aizawl – 796 001 9. Chief Engineer (P), Electricity Department, Govt. of Manipur, Keishampat, Imphal – 795 001 10. Chief Engineer (P), Department of Power, Govt. of Nagaland, Kohima – 797 001 11. General Manager, TSECL, Agartala – 799 001 12. ED (O&M), NERTS, PGCIL, Dongtieh-Lower Nongrah, Lapalang, Shillong -793 006 13. ED (O&M), NEEPCO Ltd., Brookland Compound, Lower New Colony, Shillong-793003 14. ED (Commercial), NEEPCO Ltd., Brookland Compound, Lower New Colony, Shillong-793003 15. ED (O&M), NHPC, NHPC Office Complex, Sector-33, Faridabad,Haryana-121003 16. GM (Plant), OTPC, Badarghat Complex, Agartala, Tripura - 799014 17. GM, NERLDC, Dongtieh, Lower Nongrah, Lapalang, Shillong -793 006 18. Member Secretary, ERPC, 14 Golf Club Road, Tollygunge, Kolkata-700033 19. Chief Engineer, GM Division, Central Electricity Authority, New Delhi – 110066

Sub: Minutes of the 87th OCC Meeting held on 9th July, 2013 at Guwahati.

The Minutes of the 87th OCC Meeting of NERPC held on 09.07.2013 at “Hotel Grand Starline”, Guwahati is enclosed for favour of kind information and necessary action please.

The minutes is also available on the website of NERPC www.nerpc.nic.in

Encl: As above

¼ãÌãªãè¾ã / Yours faithfully,

(ºããè. ãäÊãâŒããñƒÃ /B. Lyngkhoi ) ‚ã£ããèàã¥ã ‚ããä¼ã¾ãâ¦ãã / Superintending Engineer (O)

Copy to:

1. Chief Engineer, AEGCL, Bijuli Bhavan, Guwahati - 781001 2. Chief Engineer, APGCL, Bijuli Bhavan, Guwahati - 781001 3. Chief Engineer, DISCOM, Bijuli Bhavan, Guwahati - 781001 4. Head of SLDC, Me.ECL, Lumjingshai, Short Round Road,Shillong – 793 001 5. Head of SLDC, Department of Power, Govt. of Arunachal Pradesh, Itanagar- 791 111 6. Head of SLDC, Department of Power, Dimapur, Nagaland 7. Head of SLDC, Electricity Department, Govt. of Manipur, Keishampat, Imphal – 795 001 8. Head of SLDC, Department of Power, Govt. of Mizoram, Aizawl – 796 001 9. Head of SLDC, TSECL, Agartala – 799 001 10. Chief Engineer(Elect), Loktak HEP,Vidyut Vihar, Kom Keirap, Manipur- 795124 11. DGM (C&M), OTPC, 6th Floor, A-Wing, IFCI Tower -61, Nehru Place, New Delhi – 110019.

¼ããÀ¦ã ÔãÀ‡ãŠãÀ Government of India ãäÌã²ãì¦ã ½ãâ̈ ããÊã¾ã Ministry of Power

„§ãÀ ¹ãîÌããê àãñ¨ããè¾ã ãäÌã²ãì¦ã Ôããä½ããä¦ã North Eastern Regional Power Committee

½ãñÜããÊã¾ãã Ô›ñ› Öã„ãäÔãØãâ ãä¹ãŠ¶ããâÔã ‡ãŠãñ- ‚ãã¹ãÀñãä›Ìã ÔããñÔãã¾ã›ãè ãäÊã. ãäºããäÊ¡Øãâ Meghalaya State Housing Finance Co-Operative Society Ltd. Building

¶ããâãäØãÆ½ã ãäÖÊÔã, ãäÍãÊããñâØã – 793003 Nongrim Hills, Shillong – 793003.

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Ph. No: 0364 - 2520034 Fax No: 0364 - 2520030

North Eastern Regional Power Committee

MINUTES OF THE 87th OPERATION COORDINATION SUB-COMMITTEE MEETING

OF NERPC

Date : 09/07/2013 (Tuesday)

Time : 10:00 hrs

Venue : “Hotel, Grand Starline”, Guwahati.

The List of Participants in the 87th OCC Meeting is attached at Annexure – I

The meeting was started with welcome address by Shri S.K.Ray Mohapatra, MS I/C,

NERPC. He informed the house that the next TCC/RPC meeting will be held in the

month of August, 2013 after the gap of about one year and hence many issues are

to be discussed and course of action is to be finalized in this OCC meeting. Further,

he informed that the National Power Committee (NPC) meeting is also scheduled to

be held on 16th July, 2013 and NERPC have already requested GM division of CEA

to take up some important issues of NER viz. charging of Rangia- Deothang 132kV

line, advancement of peak hours for NER during winter season from 18:00 hrs to

17:00 hrs, co-ordination of shutdown of transmission elements in other region

which are affecting the ATC/TTC of NER etc. in appropriate forum or in NPC

meeting. He also informed that many important issues are to be discussed in this

OCC meeting viz. requisition based scheduling, funding for setting up & up-

gradation of SLDCs, establishment of Fibre Optic communication link, open cycle

generation of AGBPP, Pallatana generation, UFR based load shedding etc. He

expressed concern about the frequent trippings in Meghalaya & Manipur system

and at Loktak, NHPC and requested the concern constituents to look into the

matter seriously for improvement in the situation and for safe and secure operation

of the grid. Further, he also stated that the DPR have been received from all the

constituents, except POWERGRID and the total estimated cost is about Rs. 816

Crores for taking up rectification work in seven (7) state sectors. He mentioned that

funding for entire amount projected for the scheme may not be available and hence

constituents should gear up or plan accordingly to rectify the deficiencies in their

system. The issue may be discussed in the coming NPC meeting and the outcome

Minutes of 87th OCC meeting held on 9th July, 2013 at Guwahati

2

will be intimated to all the constituents. He requested all the constituents to

actively participate in the discussion for fruitful outcome of the meeting.

Thereafter, Member Secretary I/C requested Shri B. Lyngkhoi, SE(O), NERPC to

take up the agenda items for discussion.

CONFIRMATION OF MINUTES OF 86th MEETING OF OPERATION SUB-COMMITTEE OF NERPC.

S.E (O) informed that the minutes of 86th meeting of Operation Co-ordination Sub-

committee held on 7th June, 2013 at Guwahati were circulated vide letter No.

NERPC/OP/OCC/2013/3531-60 dated 14th June, 2013.

No observations or comments were received from the constituents, the minutes of 86th OCC meeting was confirmed.

SE (O), NERPC then requested NERLDC to give the presentation on the grid

performance of NER during the month of June, 2013.

During the presentation, it was observed that the drawal pattern of Meghalaya is

very erratic which, is not a healthy practice. Meghalaya representative stated that

the problem with their own generation has resulted in such scenario and the matter

will be looked into. On the other hand, it was observed that most of time Tripura

was in over drawal mode which may endanger the grid.

SE (O) stated that after the grid disturbance of 31st July, 2012, all the constituents

have been directed to follow the advice of RLDC to avoid unnecessary grid

disturbances, hence Tripura should strictly adhere to the advice of NERLDC.

Tripura agreed.

The Sub-committee noted as above.

A. C O N F I R M A T I O N O F M I N U T E S


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I T E M S F O R D I S C U S S I O N

B.1. OPERATIONAL PERFORMANCE AND GRID DISCIPLINE DURING MAY’

2013

As per the data made available by NERLDC, the grid performance parameters for

June, 2013 are given below:

i) Average frequency during June, 2013 was 50.08 Hz as compared to 50.06 Hz in

May, 2013

ii) Minimum frequency in June, 2013 was 49.05 Hz (18.06.13 at 21:19 hrs) as

compared to 49.33 Hz recorded in the previous month.

iii) Maximum frequency was 50.77 Hz (16.06.13 at 13:29 hrs) as compared to 50.94

Hz recorded in May, 2013.

iv) System frequency remained within permissible range of 49.7 Hz to 50.2 Hz for

80.90 % of the time, below 49.7 Hz for 1.62 % and above 50.2 Hz for 17.48 % of

the time as compared to 87.32 %, 1.38 % and 11.30 % respectively in the

previous month.

v) Regional peak demand in June, 2013 was 2101 MW as compared to 1993 MW in

May, 2013, an increase of 5.4 % over the previous month.

vi) Regional peak availability was 1900 MW as compared to 1810 MW in previous

month, an increase of 4.97 % over the previous month.

vii) Energy requirement was 1090.91 MUs in June, 2013 compared to 994.01 MUs

in May, 2013, an increase of 9.86 % over the previous month.

viii) Regional energy availability was 1021.73 MUs compared to 911.40 MUs in the

previous month, an increase of 12% over the previous month.

ix) Rise in demand met was recorded in Manipur (3%), Assam (1%), Ar. Pradesh

(6%), Mizoram (9%) & Tripura (4%) over the previous month.

x) Drop in demand met was recorded in Nagaland (4%) Meghalaya (6%) over the

previous month viz. May, 2013.

xi) No Over Voltage at 400 kV Sub-Station was observed

xii) No over Voltages were observed at 220kV & 132 kV S/S.

xiii) No under Voltages were observed at 400 kV S/S & 220 kV S/S. xiv) No Under voltage at 132kV S/S was observed. xv) Regional Generation & Inter-regional Exchanges during the month of June,

2013 compared to may, 2013 are given below:


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SN Parameter June, 2013 May, 2013

REGIONAL GENERATION & INTER – REGIONAL EXCHANGES (in MU)

1 Total Generation in NER (Gross) 875.862 868.097

2 Total Central Sector Generation (Gross) 537.135 571.403

Total State Sector Generation (Gross) 338.221 296.694

3 Inter-Regional Energy Exchanges

(a) NER – ER 20.76 31.67 (b) ER – NER 187.18 93.97

(c) Net Import 166.43 62.30

The Summary of Category A, B, C Messages issued by NERLDC for the constituents

of NER for the Month of May, 2013 is given as below:

State

A

(<49.8 Hz)

B

(<49.7 Hz)

C

(<49.7 Hz

Persistent

Overdrawal)

Total

May’13 Jun’13 May’13 Jun’13 May’13 Jun’13 May’13 Jun’13

Ar. Pradesh 03 7 0 0 0 0 03 7

Assam 01 5 0 0 0 0 01 5

Manipur 04 4 0 0 0 0 04 4

Meghalaya 01 3 0 0 0 0 01 3

Mizoram 01 3 0 0 0 0 01 3

Nagaland 02 7 0 0 0 0 02 7

Tripura 01 9 0 0 0 0 01 9



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FOLLOW UP ACTION

C.1 Synchronization of Pallatana Module -I

During 86th OCC meeting, the representative of OTPC informed that the machine

was desynchronized due to problem of gas contamination and problem associated

with valve operation at ONGC end. The matter has been taken up with ONGC for

smooth operation of the unit. The machine is expected to be re-synchronized on 8th

June, 2013.

NERLDC requested OTPC to communicate their generation schedule 2-3 days in

advance so that the necessary co-ordination can be done with constituents of the

region for smooth operation of grid.

The committee requested OTPC to submit the detail list of all tests and

commissioning activities which have been completed by 25th May, 2013. Further,

the tests which are required to be done before commissioning may also be informed

with details to NERPC and NERLDC.

OTPC informed that on 15th May, 2013 DLN tuning was completed and only PPA

test is left out for which OTPC required 3 days continuous run under full load (350

MW and above). Before PPA test, OTPC would like to run the Unit continuously for

two (2) days under full load to ensure stable operation of machine.

Me.ECL informed that their Hydro machines have started their generation and in

any case their generation should not be backed down for trail operation of Unit# 1

of OTPC.

Tripura stated that during the test run of Unit# 1 of OTPC, their generation should

not be backed down as one unit of Baramura is already under shutdown.

POWERGRID informed that the commissioning schedule of 400 kV Byrnihat-

Bongaigan is December, 2013.

MS I/C enquired about frequent tripping of reactor at Palatana end. The

representative of OTPC informed that the problem has been resolved by BHEL.

After detailed deliberation the committee decided as follows:


6

1) OTPC shall be allowed to go for PPA test which requires continuous run for 72

hours under full load (350 MW and above). Also, before PPA test, the Unit may

be run for two (2) days under full load to ensure stable operation of machine.

2) There should be no financial implication to other constituents due to backing

down of their machines, if required.

3) OTPC should intimate their generation schedule two days in advance to

NERLDC/NERPC for proper co-ordination with constituents and OTPC should

strictly adhere to their declare schedule for safety of the grid.

Deliberation of the Committee

OTPC representative informed that the plant was inaugurated by His Excellency

President of India on 21st June, 2013 and during that time the generation was

around 70 MW. However, the machine tripped after sometime due to some problem

in the gas pipeline. OTPC is trying their best, in consultation with ONGC and

BHEL, to resolve the problem as early as possible so that COD is achieved before

July 31, 2013, the deadline as per CERC order.

The Sub-committee enquired from OTPC & POWERGRID about the following issues:

i) Permission from CERC for Extension of injection of infirm power till CoD & Commissioning of Unit #2

OTPC informed that the matter regarding the dead line for injection of infirm power

to the grid is being taken up by the management and necessary action will be taken

in time. Further, he informed that Unit #2 is ready in all respect and the same is

likely to be commissioned by August, 2013

ii.) The status of following transmission system associated with evacuation of power from generating stations of OTPC at Palatana and of NTPC at Bongaigaon as informed by POWERGRID is given below:

Byrnihat – Bongaigaon 400kV line – October, 2013 Balipara – Bongaigoan 400 KV D/C line - December, 2013

Silchar- Imphal 400kV D/c line and substation at Imphal- works in progress

Silchar- Melriat 400kV D/c line and substation at Malriat - works in progress

Mariani – Mokokchung 220kV D/c line - works in progress


7

SN Name of Line

Total Tower

Locations

Line Lengt

h (Km)

Cummulative Progress as on 01.07.2013

Foundations

completed

(Nos)

Erection of

towers (Nos)

Strng (Ckm)

1 400KV D/C Silchar - Melriat line 436 143.58 142 125 79.3 2 400KV D/C Silchar - Imphal line 472 165.99 298 179 51.08 3 220KV D/C Mariani (New) - Mokokchung 157 48 79 47 0 4 400KV D/C Byrnihat-Bongaigaon line 565 201.46 498 485 134.082

DGM, POWERGRID stated that the status of works which are under progress will

be intimated in the next TCC/RPC meetings. Further, POWERGRID informed that

400kV Balipara – Bongaigaon D/C line # 3 & 4 with FSC & Quad conductor will be

commissioned by December 2013. This line will enhance the reliability of NER

system.


C.2 Independent third party audit of protection system:

During the 86th OCC meeting, SE (O) informed that Arunachal Pradesh, Tripura

and Mizoram have already finalized their DPR and soft copy has been submitted to

NERPC. Assam, Manipur and Nagaland informed that their DPR will be submitted

very soon.

All the constituents, except NHPC & POWERGRID, have completed the DPR and

submitted to CEA. The copy of DPR has been received in NERPC Secretariat from

all state constituents and NEEPCO, except Assam, Mizoram and NHPC.


SE (O) stated that the DPR have been received from all the constituents, except

POWERGRID and funding for entire amount projected for the scheme may not be

available and hence constituents should gear up or plan accordingly to rectify the

deficiencies in their system. The rectification / renovations of substations /

generating stations are required for safety, security and reliable operation of the

system. He requested the constituents to priorities the work and identify the critical

sub-stations and plan accordingly based on the availability of the fund.


8

On enquiry about the status of DPR, DGM, POWERGRID informed that DPR has

already been prepared and has been sent to corporate office for approval before

submission to CEA and NERPC and the estimated cost is about Rs. 23.7 crores.

The estimated cost projected in the DPR for rectification / renovations of

substations / generating stations is given below:

Name of Utility Estimated Cost (Rs. In Crores)

Ar. Pradesh 33.454

Assam 381.584

Manipur 40.815

Meghalaya 187.659

Mizoram 65.247

Nagaland 37.525

Tripura 73.618

NEEPCO 40.74

NHPC 5.137

POWERGRID 23.700 (subject to approval from Corporate office)

Total Rs. 889.479 Crores (Approx.)


C.3 Details of Installations and self-certification (by STUs and CTUs) in respect of operationalisation of Under Frequency Relays (UFRs) in NER systems and additional requirement of UFR and df/dt relays:

During 86th OCC, the committee decided that the UFR based load shedding will be

as follows:

The 60% of NER’s peak load (i.e. about 1800 MW) = 1080 MW. The amount of load

shedding for NER could be as follows:


9

Sl. No. Stages Frequency

(in Hz) Amount of Load shedding (in %)

Amount of Load shedding (in MW)

1 Stage-I 49.2 10% 108

2 Stage-II 49.0 10% 108

3 Stage-III 48.8 15% 162

4 Stage-IV 48.6 15% 162

Total load shedding 540


Member Secretary (I/C) informed that the matter relating to UFR based load

shedding will be discussed in next NPC meeting to be held at Delhi on July 16,

2013. As per calculation submitted by WRPC for discussion in NPC meeting, the

quantum of load shedding will be less than 540MW for NER. The outcome of the

discussion of the NPC meeting will be communicated in next OCC meeting. The

committee requested all the constituents to identify the feeders for above four

stages of load shedding so that the same can be finalized in the next OCC meeting

and the matter will be referred to next TCC/RPC, if required.


C.4 Lines under long outages

The status for restoration of these lines as reviewed in the 86th OCC meeting is as

follows:

(a) 220kV BTPS – Agia line (one ckt) – Tender has already been opened and order

is likely to be placed by April, 2013 and the target for completion of work is

January, 2014.

(b) 132kV Mariani – Mokokchung line – during 83rd OCC meeting, AEGCL informed

that the line was charged but tripped immediately after charging due to faults

in some portion of the lines under Nagaland. During 84th OCC meeting, the

representative of Nagaland informed that the work of replacement of some


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insulators is under progress. After completion of replacement work, the line

can be charged. The status could not be updated since there was no

representative from Nagaland

(c) 39km of 132kV Rengpang – Jiribam line – Manipur informed that stringing of

line is complete and work at termination point near substation is going on; the

same will be completed by July, 2013.

(d) 132 kV Dimapur - Dimapur - II line – POWERGRID informed that Nagaland has

agreed to the proposals made by them and the issue will be resolved soon.

Nagaland representative informed that some local arrangement is being done to

charge the Kohima line directly from Dimapur S/S and the work is likely to be

completed by April 2013. As soon as the work is over, the problem with 132 kV

Dimapur - Dimapur - II line will be resolved in association with POWERGRID.

The status could not be updated since there was no representative from

Nagaland.


The status for restoration of these lines as reviewed in the 87th OCC meeting is as

follows:

(b) 220kV BTPS – Agia line (one ckt) – Tender has already been opened and order

is likely to be placed by April, 2013 and the target for completion of work is

January, 2014.

(b) 132kV Mariani – Mokokchung line – during 83rd OCC meeting, AEGCL informed

that the line was charged but tripped immediately after charging due to faults

in some portion of the lines under Nagaland. During 84th OCC meeting, the

representative of Nagaland informed that the work of replacement of some

insulators is under progress. After completion of replacement work, the line

can be charged. Representative from DoP, Nagaland informed that the work is

in progress to revive this line by replacing the insulators, checking the

jumpers, conductor etc. Further, he informed that the work is likely to be

completed by September, 2013.

(c) 39km of 132kV Rengpang – Jiribam line – During 86th OCC meeting the

representative of Manipur had informed that stringing of line is complete and


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work at termination point near substation is going on; the same will be

completed by July, 2013. The status could not be updated since no

representative from Manipur was present.

(d) 132 kV Dimapur - Dimapur - II line – POWERGRID informed that Nagaland has

agreed to the proposals made by them and the issue will be resolved soon.

Nagaland representative informed that some local arrangement is being done to

charge the Kohima line directly from Dimapur S/S and the work is likely to be

completed by April 2013. As soon as the work is over, the problem with 132 kV

Dimapur - Dimapur - II line will be resolved in association with POWERGRID.

Representative from DoP Nagaland informed that since Kohima is State capital

and it will be difficult to give consent unless power is assured from Karong side.

He further mentioned that POWERGRID had intimated that they will take up

with DoP Manipur to check the healthiness of the line and communication link

between Kohima and Karong before taking shutdown to take up LILO work at

Dimapur, but the same has not been carried out by them.

DGM, POWERGRID informed that as per the latest status, DoP, Nagaland has

not completed the local arrangement as referred above. Further, he requested

the forum to refer the matter to 14th NERPC Meeting as no positive outcome

has been observed so far.


C.5 SPS scheme for Pallatana

During 84th OCC meeting, the committee reviewed the nomination for System Study

Group; the nominations were as given below:

Ar. Pradesh – Shri Tarik Mize, Executive Engineer.

Assam – Navjit Patir, AEGCL.

Manipur – Shri N. Jasobanta Singh, AE & Shri Th. Bimol Singh, AE

Mizoram- Sh. C.C.Lalrimwala, SDO & Sh. Zoramdina, AE

Meghalaya – Sh. D.J. Lyngdoh, AEE, SLDC & Sh. L. Nongkhlaw, AEE, SLDC

Nagaland- Sh. S. Longkumer, SDO, Sh. H. Assumi, SDO & Sh. C. Walling, SDO

Tripura – Sh. Mrinal Paul, Manager & Sh. Anwesh Choudhury, Manager.

NEEPCO – Sh. Bhaskar Goswami, Sr. Manager.

NERLDC – Sh. A. Mallick, CM & Sh. Anupam Kumar, Engineer


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NERTS – Sh. P. Kanungo, DGM & Sh. Supriya Paul, Dy Manager

OTPC – Sh. Tapas Karmakar, Asstt. Manager

NERPC – Sh. Lalrinsanga, EE & Sh. S.M. Jha, EE

IIT, Guwahati - nomination will be taken up by NERPC Secretariat.

During 84th OCC meeting, NERLDC gave the presentation on system studies

associated with System Protection Scheme (SPS) under following conditions:

Case 1: Tripping of generating unit of OTPC at Palatana

Case 2: Tripping of 400 kV D/C Palatana-Silchar line

Case 3: Tripping of 400 kV Silchar-Byrnihat line,

NERLDC informed that the study was carried out by taking the base case of NER

peak and off-peak conditions in July, 2013.

During off-peak hours, the above trippings may not create serious problem. But

during peak hours, above trippings may lead to grid disturbance.

As pre-condition, for successful operation of the proposed System Protection

Scheme (SPS), the following lines should be kept in open condition for all the three

cases mentioned above

132 kV D/C Khliehriat(PG) – Khliehriat(MeECL) lines at Khliehriat(MeECL)

132 kV Khliehriat(MeECL) – NEHU line

132 kV Khliehriat(MeECL) – NEIGRIHMS line

132 kV Pailapool – Jiribam line at Jiribam end

The scheme for all the three cases will be as follows:

Case 1: When Palatana unit trips:

i. When generator at Palatana trips a signal will be generated from trip relay of

the unit.

ii. This signal should trip the CB of 132 kV Silchar – Srikona D/C & 132 kV

Silchar – Panchgram lines at Silchar.

iii. Subsequent to tripping of 132 kV Silchar – Panchgram line, the CB at

Badarpur of 132 kV Badarpur – Panchgram line should be tripped.


13

iv. After these trippings an instant load of 80 MW will be relieved during off-

peak hours & 130 MW will be relieved during peak hours which will prevent

the system from cascade tripping

v. Then manual demand disconnection/management should be imposed.

Case 2: When 400 kV Palatana-Silcher (D/C) lines trip

i. When both the ckts of 400 kV Palatana – Silchar lines trips, a signal will be

generated from trip relays at Silchar

ii. This signal should trip the CBs at Silchar end of 132 kV Silchar – Srikona

D/C & 132 kV Silchar – Panchgram lines.

iii. Subsequent to tripping of 132 kV Silchar – Panchgram line, the CB at

Badarpur end of 132 kV Badarpur – Panchgram line should be tripped.

iv. After these trippings an instant load of 80 MW will be relieved during off-peak

hours & 130 MW will be relieved during peak hours which will prevent the

system from cascade tripping


Case 3: 400 kV Silchar – Byrnihat line

i. When 400 kV Byrnihat – Silchar lines trip, signal will be generated from trip

relays at Silchar

ii. This signal should trip CB of GTG/STG of Generating Unit at Palatana. But

unit may run in Full Speed No Load (FSNL) condition.

iii. An instant relief of load of 230/130 MW will prevent the system from cascade

tripping.


The committee deliberated in details about trippings under above three conditions

and requested POWERGRID to check the feasibility for implementation of the

above schemes. Further, the committee requested all constituents to go through

the schemes and give their suggestions/comments before finalization of the

schemes.

MS I/C, NERPC informed that the SPS should be in place before trial operation of

Unit #1 of OTPC for safe operation of the grid and requested POWERGRID & OTPC


14

to take early necessary action for designing the scheme including inter-tripping

arrangement for successful implementation of the proposed SPS scheme. All

constituents agreed to give their comments in the next OCC/PCC meeting to

finalize the SPS.

During the 86th OCC meeting, the representative of OTPC informed that necessary

action has already been taken at their end for successful implementation of the

proposed SPS pertaining to tripping of generating Unit#1 (Case-I). The auxiliary

contact of CB has been wired upto PLCC panel in consultation with POWERGRID.

DGM, NERLDC stated that the backing down of generation manually will not solve

the problem the scheme should operate automatically.

EE(O), NERPC informed that the SPS scheme for Case 2 may be reviewed as it may

require backing down of generation /tripping of GT/STG of Unit #1 of OTPC.

OTPC requested the forum that the SPS pertaining to other two cases [Case-II &

Case-III], requiring automatic tripping of STG/GT of generating Unit#1, needs

further discussion. The tripping of STG may lead to reduction of generation to a

very low level. Hence detail discussion is required with BHEL, POWERGRID,

NERLDC and NERPC before implementation of the SPS for Case II &III.

Meghalaya stated that Leshka HEP has started full generation and since so many

Meghalaya lines are kept in open condition for implementation of SPS, NERLDC

need to ensure the evacuation of full generation of power of Leshka HEP.

After detailed deliberation, the committee suggested that the system study group

need to study the proposal in detail, particularly SPS pertaining to Case-II & III

and prepare action plan for implementation of SPS.


During 87th OCC meeting, OTPC informed that the proposed SPS pertaining to

tripping of generating Unit#1 (Case-I) has already been implemented successfully

in consultation with POWERGRID. However, discussion is required with BHEL,

POWERGRID, NERLDC and NERPC before implementation of the SPS for Case II &

III.


15

The representative of OTPC requested for a meeting of representatives of above

organizations to resolve the matter at the earliest either at Palatana or at NERTS,

Shillong.

SE (O) enquired from OTPC about the likely date to have this discussion. OTPC

confirmed for 23rd July, 2013.

The Sub-committee decided that the issue shall be discussed and finalized on 23rd

July, 2013 at NERTS, Shillong and requested OTPC to attend the above meeting

along with representative of BHEL.


C.6 Implementation of islanding scheme in NER

During the 85th OCC meeting, MS I/C, NERPC informed that during the NPC

meeting, held at CEA, New Delhi on 15th April, 2013, he had expressed the

difficulty in preparation of islanding schemes in NE Region because of very low

level of frequency (i.e. 47.9 Hz) proposed for islanding. POSOCO was requested by

NPC to extend necessary guidance / assistance to NERPC / NERLDC in

formulation of the suitable islanding scheme(s) in that region.

The islanding Scheme proposed by NERLDC was discussed.

The committee enquired about the frequency setting for tripping of the Gas based

generating Units covered under the proposed islanding schemes.

Assam representatives informed that the frequency setting for tripping of the Gas

based generating Units of NTPS is 48.72 Hz.

NEEPCO informed that the frequency setting for tripping of the Gas based

generating Units is generally much higher than proposed islanding frequency i.e.

47.9Hz. The frequencies at which generating Units of AGBPP are likely to trip are

47.5 Hz (for M/s Mitsuibisi make unit) and 48.0 Hz (for M/s BHEL make unit) and

that of AGTPP is 48.0 Hz. OTPC informed that frequency setting for tripping of the

Gas based generating Units of OTPC is 47.8 Hz (for M/s BHEL make Unit).

During the 86th OCC meeting, the committee had decided the following islanding

scheme and associated frequencies levels for creation of islands in NER:


16

Sl. No. Islanding Scheme Frequency

1. Island comprising of generating units of AGBPP, NTPS &

LTPS and loads of Upper Assam system & Deomali area

[Total Generation: 380-400MW and load: 200-300MW]

48.80 Hz

2. Island comprising of generating units of AGTPP,

generating units at Baramura, Rokhia & Gumati (Hydro)

and loads of Tripura system & Dullavcherra area [Total

Generation: 150-160MW and load: 110-150MW]

48.20 Hz

3. Isolation of NER from NEW grid at ER-NER boundary with

rest of the generation and load of NER

47.90 Hz

Further, the committee suggested for discussion with ER regarding isolation of NER

from NEW grid at ER-NER boundary. All constituents were requested to study the

proposal so that the matter can be discussed further for finalization.


The islanding scheme 1 & 2 above was agreed by the committee. However, for 3rd

islanding scheme, committee requested NERLDC to go for system study before

finalization. When the NER grid is in import mode, isolation of NER from ER grid

may deteriorate the situation further in NER. But when the NER grid is in export

mode, isolation of NER from ER grid may be helpful. After isolation, NER may be in

a position to support ER for early restoration of their system. DGM, NERLDC

informed that depending on the power flow in NER-ER corridor, the islanding

scheme can be made functional accordingly.

The committee requested NERLDC to take initiative to involve the system study

Group to study the proposed islanding Scheme and SPS in detail. NERLDC agreed.



17

C.7 Loadability Enhancement of 132KV Transmission lines:

NERLDC has requested POWERGRID, vide their letter No.NERLDC/GM/547 dtd

14.11.2012 for enhancement of loading capacity of the following lines:

a) 132KV S/c Badarpur-Khliehriat Line (77 KM)

b) 132KV S/c Loktak-Jiribam-II Line (82 KM)

c) 132KV S/c Dimapur-Imphal Line (169 KM)

d) 132KV S/c Imphal-Loktak-II Line (35 KM)

NERLDC has stated that enhancement of loading capacity of the above lines is

required for higher load dispatch, particularly in the context of evacuation of power

from Pallatana GBPP.

Accordingly, POWERGRID has already taken the following actions for increased

loadability:

Upgradation of existing CTs

Upgradation of the terminal CTs of 132KV S/C Loktak-Jiribam_II line, 132KV S/c

Dimapur-Imphal line is being taken up by POWERGRID for which the required

number of CTs of higher capacity (600/1) had already been ordered by

POWERGRID & subsequently dispatched from the manufacturer premises in the

month of July-12. However, 10Nos. CTs were damaged during transit. The matter

has been taken up with the concerned manufacturer for replenishment of the

damaged CTs. The new CTs expected to arrive at site by January’13.

Installation of the same shall be carried out on arrival of the new CTs. As for 132KV

Badarpur-Khliehriat line, the terminal CTs installed are of 600/1 capacity.

During 80th OCC meeting, NERLDC requested to include following lines for

enhancement of loading capacity:

i) 132 kV Khandong- Khlerehiet –I

ii) 132 kV Khandong - Haflong

The committee requested POWERGRID to complete the CT replacement of the

above lines at the earliest to increase the loadability of these lines.


18

During 83rd NEEPCO informed the house that tenders are yet to be called for

procurement of CTs.

POWERGRID informed that the work for enhancement of loading capacity of the

above lines will be completed by June, 2013.

NEEPCO informed that the work for enhancement of loading capacity of 132 kV

Khandong- Khliehriat –I & 132 kV Khandong - Haflong lines will be completed by

Jan, 2014. However, NEEPCO also requested for inclusion of cost of the required

CTs in the DPR, likely to be prepared based on findings of protection audit team.


NEEPCO informed that the procurement of CTs for Khandong – Khliehriat and

Khandong-Halflong is in progress and the work will be completed by January,

2014.


Fixing of Additional Jumpers:

Fixing of additional jumpers at Tension Locations of 132KV Dimapur-Imphal line

has been completed while that for 132KV Jiribam-Loktak_II line is planned for

execution in the month of January-13.

In addition to the above, additional jumpering is now planned to be taken up for

132KV Loktak-Imphal-II & Badarpur-Khliehriat lines in line with NERLDC’s

observation.

During 83rd OCC meeting, POWERGRID intimated that the fixing of additional

jumpers in 132 KV Loktak – Jiribam – II line has been completed on 01.03.2013.

Also fixing of additional jumpers in 132 KV Badarpur – Khliehriat line & 132 KV

Loktak – Imphal – II line the order for special connectors has already been placed

by them and the same is likely to be delivered at site by 20.03.2013. Accordingly,

the work is planned to be started w.e.f. 25.03.2013 in 132 KV Badarpur –

Khliehriat line followed by 132 KV Loktak – Imphal – II line.

POWERGRID informed that the fixing of modified connectors is under progress and

the work is likely to be completed as per schedule.


19

Deliberation of the Committee:

DGM, POWERGRID informed the current status of existing CTs & Additional

jumpering in identified transmission lines as below:

SN Line for loadability enhancement

Status of Up-gradation of existing

CTs (300/1) to higher capacity CTs (600/1)

Fixing of additional jumpers at all

tension locations

1 132 KV S/C Loktak – Jiribam II Complete Complete

2 132 KV S/C R.C. Nagar – Kumarghat Complete Complete

3 132 KV S/C Aizawl – Kumarghat Complete Complete

4 132 KV S/C Nirjuli – Ranganadi Complete Complete

5 132 KV S/C Dimapur – Imphal Planned in July, 13 Complete

6 132 KV S/C Badarpur – Khliehriat Complete Complete, except for 20 locations. Expect

to complete Sept, 2013

7 132 KV S/C Loktak – Imphal II Complete Planned in Oct, 13.

Materials under procurement


C.8 LGBR for 2013 -2014:

SE (O), NERPC informed that NERPC Secretariat has finalized the LGBR for 2013-

14 and the abstract of LGBR is enclosed at Annexure C.8. All constituents are

requested to check the details and give their comments, if any before circulation of

LGBR. Further, he requested all the STUs, Generators and POWERGRID to submit

the outage planning for Generating units as well as important transmission

elements which affects the operation of the NER grid at the earliest so that same

can be included before circulation. All constituents agreed.



20

C.9 Grid Security Expert System (GSES):

POWERGRID has planned an automated defense plan for all five regions named as

Grid Security Expert System (GSES). The Region wise estimated cost based on the

feeders identified by POSOCO including IDC shall be as follows:

S.N Subject NR SR WR ER NER All India

1. Estimated DPR cost of GSES (in Rs. Crores)

82.59 42.13 124.85 55.42 49.47 354.46

2. Number of Feeders 1064 763 1502 503 410 4242

3. Estimated DPR cost of OPGW based communication system (in Rs. Crores)

141.61 368.37 174.24 83.18 80.42 847.82

4. Length of OPGW 4967 14706 6111 2868 2688 31340

Total Estimated cost (in Rs. Crores)

224.20 410.50 299.09 138.60 129.89 1202.30

The GSES was discussed in detail in last Special TCC held at Shillong on 9th

February, 2013. After detailed deliberation the following decisions of the TCC was

conveyed to CERC.

1. All constituents agreed in principle to the technical requirement of the GSES

scheme for NER grid.

2. The basic infrastructure at most of Sub-station like circuit breakers, protection

relays, etc. are not adequate for implementation of the scheme.

3. There are no full fledged SLDCs in Ar. Pradesh, Manipur, Mizoram and

Nagaland.

4. Funding is major concern as NER states are financially weak.

5. The quantum of UFR based load shedding needs to be relooked for NER States.

6. More deliberation on technical and commercial issues is required before

formulation/implementation of the scheme.


21

All constituents had agreed in principle to the technical requirement of the GSES

scheme for NER grid, but more deliberation on technical and commercial

implication was required before formulation / implementation of the scheme.

During the 86th OCC meeting, MS I/C, NERPC informed that the detailed cost

break-up was mailed to all the constituent States of the region and requested all

State constituents to examine the details and communicate their

comments/feedback to PGCIL with a copy to NERPC so that the necessary action

can be taken by POWERGRID and matter can be discussed further in TCC meeting.

The representative of Assam informed that DPR for GSES, wherein the details of the

project cost, mode of finance, interest during construction, State wise details of the

OPGW lengthwise etc. have been covered, have been examined at their end. As per

DPR, the project is to be funded by internal resources and domestic funding. For

the project, Equity component of 30% has been proposed to be made available

through POWERGRID internal resources and loan component of 70% through

domestic funding and the interest rate has been considered as 10.5% per annum.

Such high interest rate will impose huge financial burden on the states of NER and

the States are already reeling under severe financial crunch. Implementation of this

project will only be feasible in NER, if fund is provided in the form of grant/ through

POC as is done in case of Transmission tariff. Regarding the OPGW length,

representative of Assam informed that this needs to be rechecked and it is also not

very clear, whether existing and new OPGW (under execution) have been excluded

or not.

The committee requested all State constituents to examine the details

corresponding to their states and communicate their comments/feedback to PGCIL

and NERPC so that the matter can be discussed further in TCC meeting.


SE (O) informed that NERPC have mailed once again the break up details & cost of

OPGW as received from POWERGRID to all the constituents, but comments have

been received only from Assam & Tripura till date.

The committee requested all State constituents to go through the details pertaining

to GSES and communicate their comments/feedback to LDC Division PGCIL and

NERPC so that the matter can be discussed further in next TCC/RPC meeting.



22

C.10 Funding through NEC /DoNER for following projects:

(a) Expansion and Up-gradation of SCADA/EMS System and setting up new

SLDCs of North Eastern Region:

Earlier Cost Break up submitted by PGCIL was as follows: Cost break-up of installation of SLDCs in four states:

Name of State Building cost (Rs. Crs)

SLDC system cost(Rs. Crs)

Total cost (Rs. Crs)

Arunachal Pradesh 40.37 57.25 97.62 Manipur 42.96 Mizoram 40.62 Nagaland 33.8 Sub Total 215.00 Cost break-up of up gradation of SCADA in following three states: Assam 6.14 Meghalaya 6.91 Tripura 6.90 Sub Total 19.95

Present Cost Break up submitted by PGCIL is as follows:

Name of State

Building cost

(Rs. Crs)

SLDC system cost (Rs. Crs)

Total cost (Rs. Crs)

As per OBD rate (ready for

award)

No. of RTUs

SCADA/ EMS

Communication System

SCADA/ EMS system

Cost break-up of installation of SLDCs in four states: Arunachal Pradesh

39.47 43.79 14.37 97.63

8.13 21

Manipur - 32.91 11.62 44.53 6.61 11 Mizoram 14.38 19.93 6.32 40.62 5.85 6 Nagaland - 22.65 11.15 33.80 7.82 19 Sub Total 53.85 119.27 43.46 216.58 Cost break-up of up gradation of SCADA in following three states: Assam 6.14 5.01 0 Meghalaya 6.91 9.02 5 Tripura 6.90 5.98 25 Sub Total 48.42 87 NERLDC 13.63 62.05

Note 1: The cost breakup of Arunachal Pradesh, Manipur, Mizoram and Nagaland has been taken from DPR made for SLDCs


23

Note 2: The cost breakup of Assam, Tripura and Meghalaya has been taken from

DPR made for upgradation/expansion of SLDCs

Note 3: The procurement process for SCADA/EMS system of all SLDCs has been

done together including NERLDC for econimcs of scale

(b) Establishment of OPGW communication link

Central /State Sector OPGW length (km) Estimated Cost (Rs. In Crores)

Central Sector 1439 40.08

State Sector

Manipur 149 4.40

Meghalaya 107 3.20

Mizoram 59 1.80

Nagaland 25 0.74

Tripura 271 8.10

Total 1960 58.24

In 13th NERPC meeting, the committee had unanimously decided to submit a

resolution, signed by Ministers of Power of NER states, to Ministry of Power, Govt.

of India to approach DoNER / NEC for funding of above two schemes (a & b). The

matter was discussed in special TCC meeting held at Shillong on 9th February

2013. It was agreed that NERPC will approach Ministry of DoNER and NEC to

enquire about the status of funding.

NERPC has already taken up the matter with concerned authority of NEC &

DoNER. NEC has already informed that they are unable to consider funding of

above projects at this stage due to paucity of fund. Confirmation from DoNER is

still awaited.


24


Member Secretary I/C informed that during the Special TCC meeting held in

Shillong, it was agreed that POWERGRID should go ahead with setting up new

SLDCs and implementation of Expansion/Upgradation of SCADA/EMS System at

NERLDC and SLDCs of North Eastern Region and investment shall be recovered as

per tariff determined by CERC. Now POWERGRID has intimated that order for

procurement of materials has already been placed.

The Sub-committee requested to take up the matter in the next TCC/RPC meetings.


C.11 Preparation of Crisis Management Plan (CMP) for Cyber Security in Power Sector:

During the 86th OCC meeting, the committee requested NERPC Secretariat to

explore what type of cyber security is required for NER state constituents and also

requested other constituents to submit their details Crisis Management plan for

cyber security.

Meanwhile, CEA vide their letter dated 17.06.2013 has intimated that during the

meeting taken by Director (OM), Ministry of Power on 05.06.2013 had reviewed the

CMP in respect of power back-up arrangement (s) of Indian Railways as below:

“Railways have interacted with CEA and submitted their requirement with respect

to the Islanding Schemes being finalized for Northern Region and for other regions.

They further requested that the Railways requirement’s should also be considered

during finalization of Islanding Schemes of other regions for ensuring supply for

traction substation as well as important stations. Railways would provide all details

to respective RPCs/RLDCs so that the same can be considered during finalization of

islanding scheme of the concerned region. The operation of Railways is based on

Zones and is not demarcated in line with five electrical regions in the country.

Hence, for effective implementation of the islanding schemes, co-ordination between

two or more regions may be required”.


25

Railways requested for participation in OCC meetings of all Regional Power

Committee. Railways have already started attending the OCC meetings in Northern

Region. CEA have directed other RPCS to invite Railways in OCC meetings for

discussing the CMP.


All the constituents in NER stated that at present no traction substations/lines of

Railways are in operation in NER and hence the inclusion of Railways as member of

OCC forum shall be reviewed in due course of time.

The sub-Committee noted as above.

C.12 Release of day ahead drawal schedule based on actual requisition by Constituents instead of open and full capacity requisition:

During the 86th OCC meeting, NERLDC informed that the requisition based

schedule will be implemented in NER very shortly. The tendering for procurement of

the software of requisition based scheduling is in progress.

The committee requested NERLDC to prepare the modalities for daily requisition

based scheduling and same may be discussed in next OCC meeting. Before final

implementation all NER constituents should be aware of the formalities of the

scheduling system. NERLDC had agreed for a mock exercise for requisition based

scheduling vis-à-vis present system of scheduling.

During 20th CC meeting, NERLDC in its presentation highlighted the following:

When ABT was implemented in NER in November, 2003, NER Constituents expressed inability to provide station-wise, time block-wise requisition for day ahead scheduling.

It was agreed to put in place a mechanism where requisition would be equal to entitlement so as to help the States.

Since then the States in NER have been submitting requisition stating that it is equal to entitlement.

The role of SLDCs in estimating their demand accurately and furnishing requisition

on day ahead basis was highlighted in 20th CC meeting. It was also mentioned that

SLDCs being apex body within State should start intra-State scheduling to obtain

such requisition from DISCOMs. The distribution companies will have to ensure

that requisition of power is done considering the most economical and reliable

power stations.


26

During the 20th CC meeting, NERLDC stated that States of NER should start

adopting requisition based scheduling and submit time block wise requisition. To

start with the system, station-wise requisition for 96 time blocks of a day has to be

filled up by each SLDC and mailed to NERLDC. There are nine (9) ISGS in NER.

States would have to fill-up 96x9 matrix with requisition of quantum of power for

every time block from all ISGS based on the entitlement conveyed by NERLDC. The

figures would have to be filled-up in excel sheet and mailed to NERLDC. It was also

mentioned that once the new system is introduced, the beneficiaries will have to

send requisition (in excel sheet) by e-mail only.

NERLDC representative stated that all seven states should start filling-up the time

block-wise requisition and mail to NERLDC. This would be first step of mock

exercise. Date and modality for such mock exercise can be discussed in next OCC

forum. Once States are geared up through mock exercise, it would be easy to use

web based scheduling software of RLDC, which is likely to be in place in 2-3

months for which tendering process is in progress.

On an enquiry from NEEPCO regarding technical minimum, ramp-up rate etc, it

was clarified that as per IEGC, RLDC would ensure that schedule would be

operationally implementable. For this purpose, Generators should intimate

NERLDC the technical minimum level, ramp-up rate, dead band etc of their

units/stations.

Tripura representative raised some issues like revision of schedule of ROR stations,

modality of real time revision of schedule etc. The committee decided to start with

mock exercise for requisition based scheduling and requested SLDCs to go ahead

with filling up 96x9 matrix with requisition of quantum of power for every time

block and in the process other issues will be addressed as and when such situation

is encountered.


NERLDC gave a presentation on requisition based scheduling and highlighted the

difficulties likely to be encountered. During the presentation, the format in which

schedule for 96 time blocks should be submitted was explained and the importance

of minimum technical limit, ramp rate of machine, dead band of hydro machines

etc. were also explained to the constituents.


27

DGM, NERLDC requested all the constituents to submit the data in the prescribe

format so that mock exercise can be carried out.

After detail deliberation, for the benefit of constituents, the Sub-committee decided

to start the mock exercise w.e.f. 22.07.2013 and the status will be reviewed in the

next OCC meeting.


C.13 Certification of Open Cycle Generation of AGBPP:

The matter is pending with CERC for final decision. The issue was discussed in

85th OCC to find out a suitable method of certifying open cycle operation of gas

based combined cycle power plants. The feasibility of scheduling in respect of each

module was also discussed and representative from NEEPCO had expressed that it

is not feasible to give schedule of generation in respect of each module. The

schedule of generation for entire plant can only be given as the gas allocation is

being done on the basis of Installed Capacity (not on module basis).

During the hearing of petition of NEEPCO, the representative informed the

Commission that it is giving schedule on station-wise basis as per Formats provided

by NERLDC. As soon as NERLDC changes the pattern of Formats NEEPCO shall

definitely submit schedules on unit/ module basis.

Regarding payments to NEEPCO for certified open cycle period, it may be noted that

beneficiaries will have to pay the energy charges for generation made by AGBPP,

NEEPCO which was clearly indicated by Hon’ble CERC in recent hearings.

Enhanced rates are provided in the tariff regulation for recovering energy charges

while generating in open cycle mode. NEEPCO is requested to intimate the

difference in energy charges while generating in 1) closed cycle and 2) open cycle.

During the hearing of petition of NEEPCO, Hon’ble CERC advised to settle the issue

in RPC forum.

The issue was discussed in 19th CC meeting. During 20th CC meeting, NERLDC

circulated a format for declaration of capability of the combined cycle Gas based

power plant of NEEPCO at Kathalguri. The format allows module-wise declaration of

open cycle and combined cycle capability of the plant. The modality of filling-up the

format was explained with an example.


28

Regarding the past period from April 2009 till date where NERPC has indicated

open cycle operation percentage in the monthly REAs, possibility of revising

relevant REAs considering certain criteria was discussed so that the concerned

beneficiaries may settle the pending issues. However, it was agreed to wait for

CERC judgement on the petition filed by NEEPCO on this issue.

However, it was agreed to discuss the matter in next OCC before implementation of

the format. The Commercial co-ordination sub-committee also suggested to discuss

suggestions of GM division of CEA regarding open cycle operation of Gas based

power plants of WR in OCC forum before adoption in NER.

The following points were suggested by GM Division of CEA for certification of open

cycle operation of plants in Western Region:

1. GTs/ STs are asked to close down due to low system demand by RLDC or trip

out due to high system frequency and subsequently this come on bars on the

request of NERLDC.

2. STGs tripped on station fault but back in service within a short time, unless

RLDC specifically directs the GT operating in open cycle to close down.

3. STGs are on long outages and instructions for running GTs in open cycle are

given by RLDC.

4. Restarting of GTs after tripping during grid disturbances.

5. GTs starts up after annual maintenance and statutory Boiler inspection of

WHRB duly approved by REB. Open cycle operation not to be certified for GTs

tripping on station fault and shutdown other than for annual maintenance and

statutory boiler inspection duly approved by REB.

6. In the start up phase open cycle operation may be certified as per the start up

curves of the respective units.

Deliberation of the Committee The above methodology for certifying open cycle generation was discussed. After

detail deliberation, the Sub-committee decided that for the planned annual

maintenance of STG which has been approved in OCC forum, the constituents will


29

have to pay energy charge corresponding to Open Cycle operation. But when the

generator operates in OC mode due to some fault and problem is resolved in a

reasonable time, in such cases NERLDC has to certify the duration of OC operation

and accordingly it will be reflected in REA prepared by NERPC.

Regarding adoption of methodology, which was suggested by GM Division of CEA

for certification of open cycle operation of plants in Western Region, the committee

decided to wait for the direction of CERC and adopt the guidelines issued by CERC.


C.14 Power drawal at 132 KV Rangia Grid S/S from Bhutan:

During the 86th OCC meeting, MS I/C informed that NERPC has already taken up

the matter with ERPC and Bhutan Power Corporation. Further, he informed that

Bhutan Power Corporation had agreed to close the Circuit Breaker at their

Deothang (Motanga) end of 132kV Rangia- Deothang line for one week for testing

the line.

Assam informed that presently the line is charged and Assam is drawing around

25MW during off-peak & 35MW during peak hours to meet the demand in Rangia

area. Assam further requested NERPC to take up the matter with Bhutan authority

to continue with the present arrangement of interconnection of ER with NER

through 132kV Rangia – Deothang (Bhutan) line and for increase of drawal at

Rangia to 50MW.


Member Secretary I/C informed that NERPC has already taken up the matter with

Min. of External Affairs and PTC. He also stated that NERPC has also requested GM

division of CEA to take up the issue of charging of Rangia- Deothang 132kV line in

appropriate forum or in NPC meeting so that the line forms connectivity between

ER-NER. The MD of M/s Bhutan Power Corporation (BPC) will also be invited to

TCC / NERPC meeting for further discussion to resolve the matter.



30

C.15 Maintenance of Isolators at 79 Tilla S/S:

Tripura informed that maintenance work of 6 nos of isolators at 79 Tilla Grid s/s

which are connected with 132 KV R C Nagar L-I & L – II have been pending since a

very long time. Power Grid had done only partial maintenance work on 3 (three)

isolators out 6 (six). The remaining work of isolators along with Earth switches is

very urgent from operational point of view.

POWERGRID agreed to look into the issue and work is expected to be completed by

15th April 2013.

Deliberation of the Committee DGM, POWERGRID informed that purchase order of materials for the above work

has been placed and work is expected to be completed by September, 2013.


C.16 Installation of Harmonic Filters:

During the 9th NERPC meeting, POWERGRID informed that CPRI has already

carried out measurement of harmonics in the portion of NER Grid involving RHEP,

Nirjuli S/S and Balipara S/S under different conditions including isolation of ER-

NER Grid.

During the 10th NERPC meeting POWERGRID informed that CRPI has submitted

offer to them for designing of filters amounting to Rs. 1.75 lacs.

During 12th NERPC Meeting, POWERGRID informed that as per the study of CPRI,

the harmonics are generated at Satyam Steel Plant at Banderdewa in Ar. Pradesh.

So, the cost of harmonic filters has to be borne by Satyam Steel Plant, Banderdewa

and accordingly, Ar. Pradesh has to take up the matter with the consumer.

During 13th NERPC Meeting, Ar. Pradesh informed that they have received the

specification and other details of harmonic filters from POWERGRID and they will

implement the same within 2-3 months’ time i.e., within September / October

2012.


31

Till now, Satyam Steel Plant, Banderdewa has not installed the Filter which is

essential to avoid further stressing of equipments at 132/33 kV Nirjuli (PG) Sub

Station.

Deliberation of the Committee Representative from DoP, Ar. Pradesh informed that the material for the above work

has already been procured as per the specification of POWERGRID and the material

has reached the site. He requested POWERGRID to send their representative to

check and verify so that Ar. Pradesh can pursue with Satyam Steel Plant to install

the filters at the earliest. POWERGRID agreed. The status will be reviewed in the

next OCC meeting.


C.17 Frequent Tripping Of 33kV System of DOP, AP at Nirjuli and Ziro:

During 9th TCC and NERPC Meeting the issue was discussed in details and

Arunachal Pradesh informed that they have already initiated various measures to

reduce no. of faults on 33 KV lines owned by Dept. of Power, Govt. of Arunachal

Pradesh.

During 10th TCC and NERPC Meeting POWERGRID again expressed concern for

non-reduction of no. of faults in 33kV Feeders. Arunachal Pradesh again assured to

take necessary action urgently to reduce no. of faults in their 33kV lines.

During 11th TCC and NERPC Meeting POWERGRID again raised the issue. But, the

issue could not be discussed due to non-availability of representatives from

Arunachal Pradesh during the meeting and agenda point was deferred for the next

meeting.

During 12th TCC and NERPC Meeting POWERGRID again expressed the concern

and informed that the tripping of 33kV Feeders at Nirjuli and Ziro is in increasing

trend. Accordingly TCC advised NERPC to write a letter to Ar. Pradesh in this

regard.

The present status of tripping of 33kV Feeders at Nirjuli and Ziro Sub Station is as

below:


32

(a) Tripping 33kV Feeders at Ziro

SN Feeder Tripping (Jan’10–Sep’11) Tripping (Oct’11 – Jun’13)

Nos. Nos. / Month Nos. Nos. / Month

1 Kurung- Kamey 470 24.73 296 14.8

2 Old Ziro Feeder 304 16.00 136 6.8

3 Kimin Feeder 783 38.84 425 21.25

(b) Tripping 33kV Feeders at Nirjuli

SN Feeder Tripping (Jan’10–Sep’11) Tripping (Oct’11 – Jun’13)

Nos. Nos. / Month Nos. Nos. / Month

1 AP - 1 109 5.73 153 7.28

2 AP – 2 258 13.57 332 15.80

3 AP - 4 48 2.52 34 1.62

Arunachal Pradesh to take necessary action on priority to reduce no. of faults in

33kV feeders owned by DoP, Govt. of Arunachal Pradesh to avoid further failure of

transformers at Nirjuli and Ziro Sub Stations.

Deliberation of the Committee Representative from DoP, Ar. Pradesh informed that matter has been intimated to

the higher authority and trippings have come down in some feeders. However, he

informed that he will pursue the matter for further improvement.

DGM, POWERGRID stated that this issue has been discussed many times in

OCC/PCC meetings but there was no appreciable improvement in the situation. He

requested NERPC to take up the matter in the next TCC/RPC meetings.



33

D. N E W I T E M S

D.1 Proforma for Operational Statistics

The operational Statistics as given below was not furnished in the meeting.

(i) – Schedule Vs Actual Generation.

(ii) – Peak Demand: Schedule Vs Actual.

(iii) – Integrated Operation of the system.

(iv) – Details of DC, schedules and injections from Central sector stations, drawal schedules and entitlements of constituents.

(v) – Details of major reservoirs in NER.

The operational statics were shown in the presentation by NERLDC.


D.2 State-wise anticipated peak demand/requirement, shortage for July- November, 2013.

The sub-Committee reviewed & finalized the anticipated peak demand/energy requirement/Availability (without Pallatana generation) for the months of July to November, 2013.

A. Peak Demand

S.No.

State

Peak

Demand

(MW)

Jul’ 13

Peak

Demand

(MW)

Aug’ 13

Peak

Demand

(MW)

Sep’ 13

Peak

Demand

(MW)

Oct’ 13

Peak

Demand

(MW)

Nov’ 13

1 Ar. Pradesh 130 130 130 130

2 Assam 1300 1300 1350 1350

3 Manipur 130 130 130 130

4 Meghalaya 280 280 280 280

5 Mizoram 90 90 85 85

6 Nagaland 120 120 120 120

7 Tripura 250 250 250 260

Region 2300 2300 2345 2355


34

B. Peak Availability

The Committee noted as above.

D.3 Agenda from Me.ECL:

D.3.1 Metering arrangement for the 132 KV S/C line on double circuit towers at terminating stations at Nangalbibra & Agia.

Me. ECL vide their letter dated 13.06.2013 had informed that the erection work on

the 132 KV S/C line on double circuit towers from Nangalbibra to Agia is completed

and the line will be shortly ready for transmitting power between Agia &

Nangalbibra.

Me. ECL requested to install metering at both ends at the earliest to enable them to

commission the above line so as to provide alternative connectivity to the Districts

of Meghalaya in Garo Hills and West Khasi Hills as the existing line is very old and

unreliable now.


The Sub-committee requested Me. ECL to write to NERLDC for taking up the matter

with NERTS / POWERGRID so that installation of meters can be carried out at the

earliest. Me. ECL agreed.


S.No.

State

Peak

Availability

(MW)

Jul’ 13

Peak

Availability

(MW)

Aug’ 13

Peak

Availability

(MW)

Sep’ 13

Peak

Availability

(MW)

Oct’ 13

Peak

Availability

(MW)

Nov’ 13

1 Ar. Pradesh 120 120 120 120

2 Assam 1000 1050 1130 1100

3 Manipur 120 110 110 115

4 Meghalaya 250 250 250 250

5 Mizoram 75 75 75 75

6 Nagaland 90 90 110 115

7 Tripura 185 185 185 190

Region 1840 1880 1980 1965


35

D.3.2. Inclusion of 220 KV Killing – Misa D/C Line & 400 KV LILO at Killing Sub-station:

Me. ECL vide their letter dated 05.06.2013 had requested to consider 220 KV

Killing – Misa D/C line as deemed ISTS element taking into account the power

exchanges during evacuation of Pallatana generation. They have also furnished the

data as per SCADA and from Inter-state energy exchanges as recorded by SEMs at

400 KV & 220 KV links at Killing SS. Similar is the case along the 400 KV LILO at

Killing SS.


The Sub-committee requested Me. ECL to go through the CERC Order dated

21.08.2012 on suo-moto Petition No. 15/Suo-Motu/2012 regarding this issue. The

order is reproduced below:

The Commission has been determining tariff of the inter-State transmission lines

developed, owned and operated by the Central Transmission Utility and the

transmission licensees i.e., who have been granted licence by the Commission

under section 79(1) (c) and (d) of the Electricity Act, 2003 (hereinafter referred to as

"the Act").Conveyance of electricity from territory of one State to another State is

also considered to be a part of inter-State transmission system as per section 2(36)

of the Act and accordingly tariff of these lines is also required to be determined by

the Central Commission under Section 79(1)(d) of the Act. Further, some of the

owners/developers of the inter-State transmission lines of 132 kV and above in

North Eastern Region and 220 kV and above in Northern, Eastern, Western and

Southern regions have approached the Implementing Agency for including their

transmission assets in computation of Point of Connection transmission charges

and losses under the Central Electricity Regulatory Commission (Sharing of inter-

State Transmission Charges and Losses) Regulations, 2010 (hereinafter "Sharing

Regulations'). As a step towards inclusion of non-ISTS lines in the PoC transmission

charges, the Commission proposes to include the Natural inter-State lines, i.e., the

transmission lines connecting two States, for computation of PoC transmission

charges and losses. However, for the disbursement of transmission charges, tariff

for such assets needs to be approved by the Commission in accordance with the

provisions of Sharing Regulations. Accordingly, the owners of these Natural inter-

State lines were directed, vide Commission's order dated 14.3.2012, to file tariff


36

petitions for determination of tariff in accordance with the Central Electricity

Regulatory Commission (Terms and Conditions of Tariff) Regulations, 2009

(hereinafter referred to as "2009 Tariff Regulations") by 15.4.2012.

Owners of some of the Natural inter-State lines have filed the tariff petitions in

compliance of Commission's order dated 14.3.2012 and many of these Natural

interstate lines have sought time to file the tariff petitions as we directed. We hereby

direct all the Natural inter-State line owners, who are yet to file the tariff petitions,

to file tariff petitions in accordance with the 2009 Tariff Regulations, along with the

prescribed fees, before the 30.9.2012.

Further, CERC vide Order dated 06.03.2013 have again directed to Non-compliance

of CERC Order 21.08.2012 above as below:

It was come to the notice of the Commission that the some of the

owners/developers of the inter-State transmission lines of 132 kV and above in

North Eastern Region and 220 kV and above in Northern, Eastern, Western, and

Southern Regions have approached the Implementing Agency for including their

transmission assets in computation of Point of Connection transmission charges

and losses under the Central Electricity Regulatory Commission (Sharing of inter-

State Transmission Charges and Losses) Regulations, 2010. Accordingly, the

Commission vide its order dated 14.3.2012 directed the respondents to ensure that

the tariff petitions for determination of tariff is filed by the developers/owners of the

transmission line or by State Transmission Utilities where the transmission lines

are owned by them in accordance with the Central Electricity Regulatory

Commission (Terms and Conditions of Tariff) Regulations, 2009 by 30.4.2012. In

response to our directions dated 14.3.2012, the respondents have not filed tariff

petitions for determination of transmission tariff.

The Commission in its order dated 21.8.2012 had further directed as under:

"Owners of some of the Natural inter-State lines have filed the tariff petitions in compliance of Commission`s order dated 14.3.2012 and many of these Natural inter-State lines have sought time to file the tariff petitions as we directed. We hereby direct all the Natural inter-State lines owners, who are yet to file the tariff petitions, to file tariff petitions in accordance with the 2009 Tariff Regulations, along with the prescribed fees, before the 30.9.2012."


37

The respondents have not complied our directions contained in our order dated

14.3.2012 and 21.8.2012.

Meghalaya representative appreciated about the information highlighted to them

and stated that they will study the CERC Order and act accordingly.


D. 3.3 SLDC Up-gradation & Parallel Communication Scheme:

Me. ECL vide their letter dated 05.06.2013 had requested for an official intimation

pertaining to constituent-wise breakup of costs in respect of the SLD Up-gradation

Scheme and parallel communication scheme, if envisaged, for optimum utilization

of the SLDC Up-gradation scheme. They have intimated that they require this for

filing of ARR with the State Regulatory Commission.


The Committee requested POWERGRID to furnish the detail breakup in respect of

estimated cost for upgradation of existing SLDCs & Parallel Communication

Scheme to Assam, Meghalaya & Tripura.


D.4 Agenda from TSECL:

D.4.1 Construction of Transmission Line from Surjamaninagar to Silchar via P.K. Bari by PGCIL:

3 Nos. of 400 KV D/C line within and across the state of Tripura is constructed by

PGCIL for evacuation of power from Pallatana 726 MW CCGT.

These are:

a. 400 KV D/C line from Pallatana – Silchar- Byrnihat – Bongaigoan

b. 400 KV D/C line from Pallatana to Surjamaninagar (charged at 132 KV)

c. 400 KV D/C line from Silchar to P.K. Bari (to be charged at 132 KV)

Evacuation of power from Pallatana project to NER Grid is solely dependent on 400

KV D/C line from Pallatana to Bongaigoan via Silchar & Byrnihat line. This line

passes through deep forest area as well as hilly terrain of high wind zone. Further,

the area is also prone to storm & cyclone. As a result the reliability of above line


38

comes under threat particularly during monsoon making the evacuation of power

from this project vulnerable. Therefore, a reliable, alternative transmission system

with higher capability is required to ensure evacuation of power from Pallatana

project. Further, the concept of TTC and ATC has called for requirement of capacity

augmentation of Pallatana Transmission System.

Since 2 nos. of 400 KV D/C line i.e. Silchar to P.K. Bari & Pallatana to

Surjamaninagar are being constructed by PGCIL, the left out middle portion of

about 130 KM line from P.K. Bari to Surjamaninagar is essentially required to be

constructed by PGCIL for enhancing the transmission capability and reliability of

grid connectivity from Pallatana project.

The Committee may discuss for construction of the above missing link by PGCIL as part of ISTS.

Also due to declaration of ATC & TTC, the optimum utilization of generation

resources throughout the country is not taking place and as a result it has been

observed that some part of the country are remaining with surplus power while the

other regions are facing huge power shortage. As far as NER is concerned, the

region is hydro pre-dominant and water energy is spilled out sue to non-availability

of transmission corridor during monsoon. But beneficiary utilities are liable to pay

all applicable charges (Transmission, Generation & Operation etc.). In addition to

the above, handling of periodical/seasonal surplus power from up-coming projects

like Pallatana, Bongaigoan, Monarchak and Subansiri will become very critical

leading to uncertainty in making due to recovery of generation and transmission

charges etc. Therefore, it is required to review the situation for economic &

optimum load dispatch & schedule.

However, the Minutes of the meeting to review the inter-state works of

Comprehensive Scheme for Strengthening of Transmission System in NER &

Sikkim held at Guwahati on 30-10-2012 was decided as below after detailed

discussion regarding construction of Surajmaninagar-P. K. Bari 400 kV D/C line

Director (SP&PA), CEA informed that the Surjamaninagar- P. K. Bari 400 kV D/C

line (initially op. at 132 kV) was agreed as a part of evacuation system from

Monarchak GBPP (NEEPCO) in the standing committee meeting on Power System

Planning in NER held on 25-06-2008 to be implemented by TSECL. Subsequently,

TSECL has included this line in the scope of works for Comprehensive Scheme for


39

Strengthening of Transmission & Distribution System in NER & Sikkim for the state

of Tripura, the DPR for which had been prepared by POWERGRID. The issue of

implementation of this line was also discussed with Secretary (Power), Government

of Tripura on 14th March, 2012 in his chamber when a team of CEA and

POWERGRID visited Tripura to prioritize the scope of works to be covered under

tranche-I of the proposed World Bank assistance. It was decided to consider the implementation of this line under tranche-II / tranche- III of the World Bank assistance depending upon priority of Tripura. In view of the above, it was agreed that the Surjamaninagar- P. K. Bari 400 kV D/C line (initially op. at 132 kV) along with 400 kV P. K. Bari sub-station may be implemented as an intra-state system.


Members of the committee supported the view of Tripura regarding construction of

missing link i.e. Surjamaninagar- P. K. Bari 400 kV D/C line (initially op. at 132

kV) along with 400 kV P. K. Bari sub-station. Member Secretary (I/C) informed that

as per minutes of meeting held at Guwahati on 30.10.2012, it has also been

decided to consider the implementation of this line under tranche-II / tranche- III of

the World Bank assistance depending upon priority of Tripura. In view of the above,

it was agreed that the Surjamaninagar- P. K. Bari 400 kV D/C line (initially op. at

132 kV) along with 400 kV P. K. Bari sub-station may be implemented as an intra-

state system.

DGM, TSECL informed that World Bank funding is not firm up at present

The Committee requested NERPC to take up the matter in the next TCC/RPC meetings.

D.4.2 Energy Audit & Energy Account Circulation:

Energy Metering System for regional energy accounting are installed & maintained

by PGCIL. Energy audit in calibration of Energy Metering Systems has so far been

not found conducted and reports not circulated to any constituent/beneficiary.

Under ABT regime the accuracy of meter reading and compilation of meter data is

very much essential for satisfactorily settlement of commercial issues. It is

therefore, proposed to carry out calibration of all energy metering system by CPRI

and conduct energy audit by Third Party Agency (TPA).


40


After detailed deliberation, the Committee requested POWERGRID to carry out the

calibration of all energy meters, which are in operation for more than five (5) years,

through external agency as per requirement of CERC.

D.4.3 Effective & Gain Full Utilization of NER Surplus Power during Hydro Season:

Tripura informed that firm entitlement of power is not shown in day ahead by hydro

generators but schedule is released on the day of operation with much variation. As

a result there is wider mismatch between actual drawal and drawal schedule. The

surplus power is forced to sale through UI and frequency remained at 50.2 Hz and

above, resulting UI price in most of the time during monsoon. Had there been

proper planning of entitlement known on day ahead, the state utility could have

properly arrange for either bilateral sale or through exchange. The states are heavily

burden with higher energy charge in addition to capacity charge of generating

stations, but enable to earn corresponding revenue. Due to such improper

utilization of energy revenue earning by state utility, payment on account of power

purchase liability is becoming uncertain.

Deliberation of the Committee The Committee decided to take up the matter in the next TCC/RPC meetings.

D.5 Agenda from POWERGRID:

D.5.1 Signing of Transmission Service Agreement:

The TSA has already been signed by NEEPCO, Mizoram, Arunachal, Manipur,

Meghalaya and Nagaland.

During 13th NERPC Meeting, Assam intimated that the matter was under process

and they would sign the TSA within two months i.e., within Sept’12. Further

Tripura also agreed to sign the TSA. But till now, Assam and Tripura both have not

signed the TSA which is mandatory as per CERC norms.


41


Representatives from Assam and Tripura informed that the matter has been taken

up with Competent Authorities and they have agreed to sign the TSA. The matter

was also discussed in 20th CC meeting. The sub-committee requested POWERGRID

to contact the concerned person of Assam & Tripura for signing of the TSA.


D.4.2 Signing of Zero Date for Indemnification Agreement:

The Kameng HEP (4x150 MW) is being implemented by NEEPCO. The original

schedule of commissioning of Kameng HEP was Nov.’09, which was subsequently

revised to Dec’12. POWERGRID had undertaken construction of transmission line

for evacuation of Power from the above project. In Oct’11, NEEPCO has again

revised its commissioning schedule to June’16. The implementation work of

associated transmission system was slowed down to the maximum extent possible

& is now likely to be completed by Mar’14.

The Lower Subansiri HEP (8x250 MW) is being implemented by NHPC. The original

Sch. of commissioning of Lower Subansiri HEP was Dec’11, which subsequently

revised to Mar’12 / Dec’12 / Mar’13 / Dec’13. The implementation work of

associated transmission system being constructed by POWERGRID was slowed

down to maximum extent possible & is now likely to be completed by Dec’13. After

various meeting, NHPC agreed for Dec’13 as zero date, but signing of

Indemnification Agreement is still pending.

NEEPCO & NHPC have yet to sign zero date for Indemnification Agreement despite

regular follow-up by POWERGRID.


NEEPCO & NHPC representatives stated that the matter has to be decided by their

Competent Authorities, hence, requested NERPC to refer the issue to next

TCC/RPC meetings.



42

D.5 Agenda from NERLDC:

D.5.1 Telemetry Data/Voice Communication of Bongaigoan TPP:

NERLDC vide their letter dated 05.06.2013 had informed that the 1st Unit of

Bongaigoan TPP (3 x 250 MW) of NTPC is expected to be commissioned during

May/June, 2014. In this regard, this is to state that before commissioning of the

project, the connectivity conditions pertaining to Telemetry Data/Voice

Communication systems in terms of clause 4.6.2 of IEGC 2012 read with clause

6(3) of CEA (Technical Standards for connectivity of the Grid) Regulations, 2007 are

fully met and the real time data of the said project be made available in the SCADA

database of NERLDC along with voice communication systems at the time of

commissioning.

Deliberation of the Committee Since there was no representative from NTPC, the issue shall be discussed in the

next OCC meeting.


D.5.2 Draft Operating Procedure Jun13 of NER:

Updated Operating Procedure Jun13 of NER finalized and e-mailed to regional

entities of NER and is available in website of NERLDC.


For Information to members.

D.5.3 Monthly MU requirement & availability of each state of NER as per format:

Requirement Name of State Jun13 Jul13 Aug13 Sep13 Oct13

Arunachal Pradesh

Assam Manipur

Meghalaya Mizoram Nagaland Tripura


43

Availability

Name of State Jun13 Jul13 Aug13 Sep13 Oct13 Arunachal

Pradesh

Assam Manipur

Meghalaya Mizoram Nagaland

Tripura

These data required for system study, daily report, computation of TTC-ATC etc.


All constituents agreed to furnish the above data to NERLDC.


D.5.4 Accommodation of Palatana generation during high hydro period:

Pallatana generation is expected at any time. Monsoon has also set in and all the

reservoirs are in rising trend and all the hydro stations are expected to generate to

their full capacity. In such a scenario it might be a very difficult task to

accommodate the generation from Pallatana as this might lead to violation of export

ATC limit forcing us to back down generation in some stations.

Deliberation of the Committee All constituents did not agree to back down their generation during high hydro

period. However, committee decided that OTPC can generate upto limit as per

advice of NERLDC taking into consideration the real time operation of the grid.

DGM, NERLDC stated that they will not be in a position to allow injection of infirm

power to grid by Palatana beyond 31st July, 2013 without the approval of CERC as

the existing approval will expire on 31st July, 2013. For the benefit of the region, the

forum also requested OTPC to stabilize their machine before the next lean hydro

period.



44

D.5.5 Furnishing machine data as per format (format available at website of NERLDC)

It was discussed during 69th OCC meeting held on 10.01.12 and subsequent OCC

meeting that machine data as per format to be furnished by concerned

utilities/SLDCs for the purpose of dynamic study.

Enquiry Committee on Grid Disturbance on 30th July 12 & 31st July 12

recommended that Dynamic Security Assessment are to be carried out periodically.

As per new Manual on Transmission Planning Criteria Jan13 of CEA & Detailed

Procedure for Relieving Congestion in Real Time Operation of CERC, stability and

related studies for reliability need to be conducted.

At this stage, at least the machine data for unit size 25 MW and above are

essentially required. SLDCs and ISGS Stations NEEPCO & NHPC are requested to

please furnish machine data as per format (available at our website i.e

www.nerldc.org) for stability and related studies for reliability.

The machine data for unit size 25 MW and above may please be furnished by next

OCC meeting. If machine data are not available, the same may please be informed

by next OCC meeting.


All constituents agreed to furnish the above data to NERLDC.


D.5.6 Installation of SEM in Motonga end of Rangia-Motonga line:

For calculation of export & import of power through 132kV Deothang- Rangia

transmission line which is treated as one inter-Regional point between ER and

NER, it weekly SEM reading of both ends meter are required. Installation of meter

in Motonga ends in pending for quite some time.

Deliberation of the Committee NERTS/POWERGRID informed that installation of SEM at Motonga end of Rangia –

Motonga 132kV line will be completed by 15th July 2013.



45

D.5.7 Non-submission of weekly SEM readings by Deomali (Ar.Pradesh) & Rengpang (Manipur):

Rengpang and Deomali are drawal points of Manipur and Ar. Pradesh respectively.

Weekly SEM readings are not being received from these locations (occasional receipt

from Motonga) in spite of discussion/decision in CCM.

Deliberation of the Committee EE/SLDC, Itanagar informed that the DCD of Deomali is not working and requires

replacement. The Sub-committee requested POWERGRID to look into the matter for

early replacement. Manipur representative was absent so Rengpang issue could not

be discussed.


D.5.8 Installation of SEM in new 33 KV Khandong-Umrangsoo feeder/ Installation of one SEM in Kopili 132/33 kV new ICT/ Details of existing 33 KV system in Khandong to review SEM requirement:

In the 20th CCM of NERPC, it has been decided to install a new energy meter at the

newly drawn 33 KV feeder from 132 KV Khandong substation of NEEPCO to its

Umrangsu 33/ 11 KV Substation thereby separating the colony supply from

Umrangsu. This new meter would be the drawl point of APDCL. As per NEEPCO,

the existing 33 KV meter at the Umrangsu substation would now record the colony

and other consumption of NEEPCO.


The Sub-committee requested NERLDC for taking up the matter with NERTS /

POWERGRID so that installation of meters can be carried out at the earliest.


One SEM may be installed in the new ICT which is meant for Kopili auxiliary

consumption.


NERTS/POWERGRID informed that SEM has already been installed.



46

In view of above modifications, it is required to review metering requirement at

Khandong/Kopili-II. NEEPCO may submit SLD indicating 132/33 KV ICTs and 33

KV feeders of Khandong to review SEM requirement.

Currently installed meters are as below out of which only NP-5781-A and NP-5776-

A are used for accounting.

METER.NO C.T.RATIO P.T.RATIO PLACE OF INSTALLATION OF SEM NP-5783-A 0025 0300.0000 KHANDONG 33KV STN TRF NP-5775-A 0050 1200.0000 KHANDONG 132/33KV ICT NP-6155-A 0200 0300.0000 LV SIDE OF 132/33KV TRF NP-5776-A 0025 0300.0000 KOPILI STG-2 33KV STN TRF NP-6154-A 0200 0300.0000 33KV DAMSITE FDR(NEEPCO) NP-5781-A 0200 0300.0000 UMRANGSOO CONSUMPTION


The Sub-committee requested NERLDC for taking up the matter with NERTS /

POWERGRID so that installation of meters can be carried out at the earliest.


D.5.9 Procurement of SEM/DCD for 2013-14:

NERLDC has worked out requirement of SEM/DCD for 2013-14 which is attached.

Matter was discussed in 20th. CCM also and it was decided to place in OCC also.


DGM, POWERGRID informed the forum that procurement process takes

considerable time and so procurement of SEMs & DCD in every year will be a

difficult job. Accordingly, he requested NERLDC to finalize requirement for next 3 or

4 years so that procurement can be taken up soon. NERLDC agreed to look into the

matter and intimated accordingly.



47

D.5.10 Interoperability of DCD for collection of reading from L&T and Elster meters:

As there would be mix of L&T and Elster meters in different locations of NER, it is

necessary that same DCD should be able to extract reading from both meters.


The Sub-committee requested POWERGRID to procure the laptops instead of DCD

as laptops are cheaper than DCD as the same has already been discussed and

approved in the 19th CC meeting. Associated Software for both types of meters (L&T

and Elster meters) can be loaded in the laptop for down loading the data.

POWERGRID may explore such possibility.


D.5.11 Return of one no. Energy Meter from Udaipur Sub-station:

TSECL had taken one no. energy meter from POWERGRID on returnable basis

which had been installed at Banduwar/Udaipur S/S end for metering drawal by

Palatana from TSECL. Now, Palatana-Udaipur 132 KV line is an injection point of

Palatana and SEM at Udaipur end may be treated as check meter as per Metering

Regulations. The SEM installed is being used for Accounting and may be

regularized accordingly.


The Sub-committee decided that the meter installed by POWERGRID at

Banduwar/Udaipur S/S end for metering drawal by Palatana from TSECL may be

treated as check meter as per Metering Regulations and the meter need not be

returned back by TSECL to POWERGRID.



48

D.6 Generation Planning (ongoing and planned outages)

The daily availability for hydro stations was reviewed in the meeting as per the

present water level of different reservoir which is as given below:

Khandong – 1.08 MU

Kopilli – 2.16 MU

Kopili- II- 0.528 MU

Ranganadi - (subject to inflow)

Doyang – 0.2325 MU

Loktak - 2.52 MU

The shutdown proposal of NEEPCO as approved by the committee is given below:

1. STG #2 of AGBPP – was already under shutdown from 24.06.2013. The shutdown

has been extended w.e.f. 26.07.2013 for a period of 6 months to take up the

balance maintenance works.

2. STG #1 of AGBPP – w.e.f. 04.08.2013 for 30 days (subject to confirmation by

Japanese Technical Advisors from MHI)


D.7 Outage Planning Transmission elements

After detail discussion the sub-committee approved the shutdown proposal for

July/August, 2013 as given in Annexure – D.7.


D.8 Estimated Transmission Availability Certificate (TAC) for the month of June, 2013.

The Estimated Transmission System Availability for the month of June, 2013,

furnished by PGCIL, is 99.9604%. The detail outage data for calculation of

Transmission System Availability furnished by PGCIL is at Annexure D.8. NER

constituents are requested to kindly communicate their views and observations, if

any, by 26th July, 2013 so that Final TAC for the month of June, 2013 can be

issued.



49

D.9 Major grid disturbances in the previous month (June, 2013 )

As intimated by NERLDC, there was no major grid disturbance during the month

of June, 2013.


D.10 Any Other Item: (a) Procurement of Netbooks/Laptops instead of DCDs:

During 20th CC meeting, NERTS representative informed that action for

procurement of lap tops could not be taken up as details viz. number of laptops,

location where laptops are to be provided etc. has not been finalized. In 19th CC

meeting, NERTS had agreed to go for lap tops (in place of DCDs) in next round of

procurement.

During 20th CC meeting, the representative of Assam suggested that spare DCDs /

laptops with required software should be made available along with internet facility

in nearby area / at a centralized location to meet any contingency requirement.


The Sub-committee requested POWERGRID to procure the laptops instead of DCD

as laptops are cheaper than DCD as the same has already been discussed and

approved in the 19th & 20th CC meetings. POWERGRID was also requested to

finalize the quantities in consultation with NERLDC.


(b) Concurrence on AMR Project:

During 20th CC meeting, it was agreed that PGCIL will give detail presentation

along with back up arrangement to take care of failure of AMR in next OCC

meeting.


50


DGM, POWERGRID informed that presentation of above AMR Project will be given

in the next OCC meeting.


(c) Replacement of L&T Make Energy Meters:

62nos. L&T meters are to be replaced by newly delivered meters which will reach

POWERGRID Shillong by 25.06.13 and target for replacement is by Aug’13.

During 20th CC meeting, NERTS representative requested that a central

coordinator for each state may be nominated as it will be difficult to manage many

coordinators (one for every station). It was agreed that nominee from each SLDC

will be the central coordinator and he will be responsible for identifying the

official(s) for each station within the state. The name of the central coordinator /

official is to be submitted in next OCC meeting.


The names of central co-ordinator for replacement of L&T meters are given below:

State Name & Designation Contact No. Ar. Pradesh To be nominated soon

Assam Sh. Jatin Baishya, AGM, LDC 09435041494

Meghalaya Sh. B. wankhar, EE (M) 09436105914

Manipur To be nominated soon

Mizoram To be nominated soon

Nagaland Sh. Atoho Jakhalu, EE (T) 09436002696

Tripura Sh. Mrinal Paul, Mgr, SLDC 09436137022



51

(d) Press conference/ press release for highlighting major shutdown of ISGS:

During 20th CC meeting, APDCL representative stated that on many occasions,

due to reduction in availability of Power, as a result of shutdown of generating

stations, SLDC used to resort to load shedding which results in public protests.

He suggested that NERPC may publish or announce such planned outages so that

the consumers are aware of the situation and appreciate the requirement of load

management.


After detailed deliberation, the Sub-committee decided that any shutdown of

generating stations or lines which affect in reduction of availability of power shall be

made available/flashed in NERPC website and constituents are requested to take

necessary action accordingly.


(e) Reactive Power Planning

The STU are requested to submit to CEA the reactive power management Schemes

in their state in consultation with RPCs.


Constituents informed that the reactive power management scheme has not been

planned so far. However, they will look into the matter and intimate accordingly.


(f) Proper functioning of UFR

As per decision of NPC, RPCs had to ensure healthiness of UFRs and df/dt relays

through regular inspection in a year of about one-third number of total relays

installed in their respective region. RPCs had also to furnish the status of

healthiness of UFRs and df/dt relays installed in the region to CEA on quarterly

basis.

Constituents are requested to inform the status of healthiness of these relays for

the quarter ending June 2013 in OCC meeting. So that same can be intimated to

CEA.


52


SE (O) informed that the above information is being received only from Assam,

Mizoram and Tripura regularly. He requested all the constituents to furnish the

same monthly so that the same can be forwarded to CEA.


(g) Ring fencing of Load dispatch Centres:

The separation of SLDC, both financially and administratively, from other activities

is desirable with a view to making the State load Despatch Centres independent &

impartial.


Constituents in NER informed that at present SLDC is under the same umbrella of

Transmission Division and have not fully independent.

SE, SLDC, Meghalaya informed that separate Aggregate Revenue Requirement

(ARR) for FY 2013-14 was already approved by the State Commission. Further, he

stated that separate Account to operate as a Small Business Unit (SBU) for SLDC

has been notified by the Govt. of Meghalaya on 18.06.2013. Also he informed that

barring few engineers who have joined SLDC recently, all engineers working in

SLDC from AE and above have been trained in basic operator level at PSTI

Bangalore during the last two years and five engineers are certified as system

operator. The latest status would be intimated accordingly.

The Sub-committee requested NERPC to take up the issue with CEA/NPC meeting

regarding the incentives to operating staffs/ officers of SLDCs.


(h) Suggestion regarding implementation of CEA Regulations:

Committee may suggest possible methods to ensure the implementation of CEA’s

regulations.


53


Member Secretary I/C requested all the constituents to go through the CEA’s

Regulations and suggest possible methods to ensure the implementation of CEA’s

regulations.


(i) Poor Availability of Auxiliary Supply at various Sub-stations of POWERGRID in NER:

In North Eastern Region, POWERGRID is operating and maintaining its EHV

transmission consisting of 16 nos. of substations spread over in all the seven

states of the region. Further, these stations play a significant role for evacuation of

power from major generation plants viz. Ranganadi HEP, Kathalguri Thermal

Plant, Kopili & Khandong HEP, Loktak HEP, RC Nagar Thermal Plant & Pallatana

GBPP to the rest of the NER Grid.

Now, for smooth operation and maintenance of these Sub Stations reliable

auxiliary power supply from states is required. Presently, auxiliary power supply in

most of the stations is provided by concerned SEBs at 33kV or 11kV through HT

feeders. However, it has been observed that availability / reliability of auxiliary

power supply provided in many stations is poor as indicated below:

SN Substation Availability / Reliability Source

1 SALAKATI 60% 11 kV Feeder from 33/11 KV Salakati (APDCL) S/s

2 KUMARGHAT 80% 11 kV Feeder from 132/33/11 KV PK Bari (TSECL) S/s

3 MISA 20% 11 kV Feeder from 33/11 KV Kathiatoli (APDCL) S/s

4 BALIPARA 75% 11 kV Feeder from 33/11 KV Balipara (APDCL) S/s

5 BADARPUR 60% 11 kV Feeder from 33/11 KV Panchgram (APDCL) S/s

6 BONGAIGAON 60% 11 kV Feeder from 33/11 KV Salakati (APDCL) S/s


54

Hence, all the concerned SEBs / DoPs as above are requested to look into the

matter and enhance the Availability / Reliability of Auxiliary power supply to the

Sub Stations of POWERGRID so that POWERGRID can give more reliable service to

the Region.


The Sub-committee suggested POWERGRID to write to the constituents directly to

resolve the issue. Please refer to item (j) also.


(j) Provision of 2nd Source for Auxiliary Supply at various Sub-stations of POWERGRID in NER:

For ensuring uninterrupted auxiliary supply at POWERGRID Substations in NER,

second connectivity from different source is required. The list of Sub Station with

proposed 2nd Source is indicated below:

SN Substation Proposed second

source of Auxiliary power

From

1 HAFLONG 33 KV Feeder AEGCL may suggest a source Station

2 SALAKATI 33 KV Feeder AEGCL may suggest a source Station

3 AIZWAL 33 KV Feeder 132/33 KV Luangmual S/s or any other alternate source identified by P&E, Mizoram

5 KUMARGHAT 33 KV Feeder 132/33KV PK Bari (TSECL) S/s

6 NIRJULI 33 KV Feeder DoP, AP may suggest a source Station

7 MISA 33 KV Feeder AEGCL may suggest a source Station

8 DIMAPUR 33 KV Feeder DoP, Nagaland may suggest a source Station

9 BALIPARA 33 KV Feeder AEGCL may suggest a source Station

10 BADARPUR 33 KV Feeder AEGCL may suggest a source Station

11 BONGAIGAON 33 KV Feeder AEGCL may suggest a source Station

12 SILCHAR 33 KV or 11 KV Feeder

AEGCL may suggest a source Station


55

It is proposed that execution of installation of requisite HT feeders & substation for

the second auxiliary power supply is carried out by the concerned SEBs as deposit

work of POWERGRID. It is requested that concerned SEBs / DoPs may identify the

alternate sources, under intimation to concerned POWERGRID substation, &

submit the estimate for supply & execution of the work at the earliest.


The Sub-committee suggested POWERGRID to write to the constituents directly to

identify the second source of auxiliary supply that can be made available in above

mentioned substations of POWERGRID to ensure uninterrupted auxiliary supply.

Accordingly the POWERGRID can take up the erection work.


(k) Diversion of various Transmission Lines on Pile foundation due to change in River Course:

Various Transmission Lines of POWERGRID in NERTS are becoming vulnerable

from time-to-time due to frequent change in river course. In such cases, PGCIL is

providing temporary embankment protection as immediate measure through

boulder sausage, spars, porcupine etc. However, in case the protection does not

work, necessary diversion of line is done on pile foundation if safe space for normal

foundation is not available.

The Tower Locations in the following transmission lines of NER had become

vulnerable due to unabated erosion caused by change in river course.

Transmission Line Location No. Remarks

132KV S/C Gohpur-Nirjuli line 73, 74 & 75 Endangered due to erosion by River Chessa

220KV D/C Balipara-Samaguri line 29 & 30 Endangered due to erosion by River Jorasor

400KV D/C Ranganadi-Balipara line 42 Endangered due to erosion by River Dikrong

Despite implementation of various Temporary Bank protection works, erosion

could not be arrested and the said tower locations became prone to collapse in the

year 2011. Considering the criticality of the above locations, immediate action for


56

shifting the locations on Pile Foundation was taken by POWERGRID. As on date,

the shifting work of above vulnerable locations in 132KV S/C Gohpur-Nirjuli line

& 220KV D/C Balipara-Samaguri line has been completed while that for loc.42 in

400KV D/C Ranganadi-Balipara line is in progress & is expected to be completed

by July’13.

Subsequently, the following tower locations have been rendered vulnerable by

unpredicted change in course of rivers flowing in their vicinity resulting erosion in

the year 2012 & 2013.

Transmission Line Location No. Remarks

400KV D/C Misa-Mariani line (charged at 220KV) 585,586,587 Endangered due to erosion by

River Doyang

400KV D/C Balipara-Bongaigaon line 288 Endangered due to erosion by River Bhola

400KV D/C Ranganadi-Balipara line 45,58, 65,66,67 Endangered due to erosion by River Dikrong

Embankment protection provided i.r.o. these locations from time to time have

failed to withstand the water surge & resultant erosion during monsoon. In order

to avert tower collapse, POWERGRID has taken action for shifting these locations

also on Pile Foundation.

Accordingly, the vulnerable stretch from loc. No. 585 to loc.587 of 400KV D/C

Misa-Mariani line and Loc. 288 of 400kV Balipara-Bongaigaon Line is being shifted

on Pile Foundations. Further, work for Pile Foundation for Loc. No. 45, 58, 65, 66

& 67 of 400KV D/C Ranganadi-Balipara line is presently in progress.

Deliberation of the Committee For kind information only.

(l) Inputs for Computation of PoC Charges and Losses for Quarter-3 (Oct’13 to Dec’13) of 2013-14, as per CERC Sharing of Inter-state Transmission Charges and Losses Regulations, 2010:

For computation of PoC Charges and Losses for Quarter-3 (Oct’13 to Dec’13) of

2013-14, as per CERC Sharing of Inter-state Transmission Charges and Losses

Regulations, 2010, all DICs and ISTS Licensees of NER are requested to furnish

Technical and Commercial Data for above period, as per specified Formats (I, II

and III). Letter No. NERLDC/SOII/135-48 dtd. 08/07/13, is issued in this regard.


57


All the constituents and generators were requested to furnish the details as early

as possible like earlier occasions. Everybody agreed to furnish.


(m) Energy Generation Data Management from Renewable Energy Sources:

In reference to meeting of CEA dated 31st May 2013 on above subject, constituents

of NER are requested to furnish data of Renewable Energy Sources (RES) in their

system to NERLDC on monthly basis, in appropriate format (Annexure).


NERLDC distributed the format in the meeting and requested the constituents to

furnish the details of Energy Generation from Renewable Energy Sources(RES) for

State’s own or embedded RES on monthly basis to NERLDC. NERLDC is

responsible for Central RES data. They will compile and send consolidated report

to appropriate authority.


D.4 Date & Venue of next OCC meeting

It is proposed to hold the 88th OCC meeting of NERPC on 8th August, 2013

(Thursday). As per roaster, Mizoram will be the host for 88th OCC meeting. The

exact venue will be intimated in due course.

The meeting ended with thanks to the Chair.

*************


58

Annexure-I List of Participants in the 87th OCC meeting held on 09/07/2013

SN Name & Designation Organization Contact No. 1. Sh. Tarik Mize, EE(E), SLDC Ar. Pradesh 09436059758

2. Sh. N.C. Das, CGM, SLDC Assam 09435559447

3. Sh. P. K. Sarma, GM, Com-T Assam 09435344083

4. Sh. B. C. Bordoloi, DGM, SLDC Assam 09435045675

5. Sh. J. K. Baishya, AGM, SLDC Assam 09435041494

6. Sh. A. K. Saikia, AGM Assam 09864116176

7. Sh. J.P.Choudhury, AGM, Comml Assam 09954055295

8. No Representatives Manipur

9. Sh. A. Kharpan, SE, Me. PTCL Meghalaya 09436117802

10 Sh. R. Syiem, SE, Me. PTCL Meghalaya 09863065704

11. Sh. F. E. Kharshiing, SE, SLDC Meghalaya 09863066960

12. Sh. T. Gidon, EE, SLDC Meghalaya 09774479956

13. Sh. Zoramdina, AE, SLDC Mizoram 08415901755

14. Sh. Peter VL Malsawma, AE, SLDC Mizoram 08974287650

15. Sh. S.L. Asangba Tikhir, SDO Nagaland 08974363552

16. Sh. B. Debbarma, DGM (SO) Tripura 09436450501

17. Sh. Debabrata Pal, Sr. Mgr Tripura 09436500244

18. Sh. Sankar Chandhini, Sr. Mgr Tripura 09436503239

19. Sh. N. R. Paul, DGM NERLDC 09436302723

20. Sh. Anupam Kumar, Engineer NERLDC 09436335379

21. Sh. P. Kanungo, DGM NERTS 09436302823

22. Sh. P. C. Barman, DGM (E/M) NEEPCO 09435144141

23. Sh. D. Choudhury, Sr.Mgr. (E/M) NEEPCO 09435339747

24. Sh. D.Goswami, Sr.Mgr. (E/M) NEEPCO 09435577655

25. Sh. A.Kalita, Sr.Mgr. (E/M) NEEPCO 09435339831

26. Sh. R.Saikia, Manager (E/M) NEEPCO 09435339834

27. Sh. R. C. Singh, Mgr (E) NHPC 09436894889

28. Sh. P. Saha, Advisor (O&M) OTPC 08974728670

29. Sh. S.K. Ray Mohapatra, MS I/C NERPC 09818527857

30. Sh.B. Lyngkhoi, SE (O) NERPC 09436163419

31. Sh. Lalrinsanga, AS NERPC 09436161886

32. Sh. S. M. Jha, EE (O) NERPC 09831078162

33. Sh. D. K. Bauri, EE (O) ERPC 09863317236

Annexure-C.8

Annexure-C.8(Page 1/2)

(ALL FIGURES ARE IN MW)SL.NO. PARTICULARS Apr-13 May-13 Jun-13 Jul-13 Aug-13 Sep-13 Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14

1. AR. PRADESH

i) MAX POWER REQUIREMENT 130 106 128 117 113 135 132 114 110 111 112 113

ii) NET POWER AVAILABILTY 113 117 118 121 121 119 128 118 95 95 94 113iii) SURPLUS(+)/DEFICIT(-) -17 11 -10 4 8 -16 -4 4 -15 -16 -18 0iv) SURPLUS(+)/DEFICIT(-) in % -13.08 10.38 -7.81 3.42 7.08 -11.85 -3.03 3.51 -13.64 -14.41 -16.07 0.002. ASSAM i) MAX POWER REQUIREMENT 1170 1253 1304 1330 1368 1296 1280 1327 1340 1273 1144 1253ii) NET POWER AVAILABILTY 806 884 866 955 955 941 1046 963 854 829 829 877iii) SURPLUS(+)/DEFICIT(-) -364 -369 -438 -375 -413 -355 -234 -364 -486 -444 -315 -376iv) SURPLUS(+)/DEFICIT(-) in % -31.11 -29.45 -33.59 -28.20 -30.19 -27.39 -18.28 -27.43 -36.27 -34.88 -27.53 -30.013. MANIPUR i) MAX POWER REQUIREMENT 99 101 112 129 137 146 133 135 123 144 124 128ii) NET POWER AVAILABILTY 103 106 111 121 123 120 140 132 110 107 108 117iii) SURPLUS(+)/DEFICIT(-) 4 5 -1 -8 -14 -26 7 -3 -13 -37 -16 -11iv) SURPLUS(+)/DEFICIT(-) in % 4.04 4.95 -0.89 -6.20 -10.22 -17.81 5.26 -2.22 -10.57 -25.69 -12.90 -8.594. MEGHALAYA i) MAX POWER REQUIREMENT 338 329 339 316 294 292 317 332 328 369 367 345ii) NET POWER AVAILABILTY 234 243 321 357 359 358 338 279 248 241 232 240iii) SURPLUS(+)/DEFICIT(-) -104 -86 -18 41 65 66 21 -53 -80 -128 -135 -105iv) SURPLUS(+)/DEFICIT(-) in % -30.77 -26.14 -5.31 12.97 22.11 22.60 6.62 -15.96 -24.39 -34.69 -36.78 -30.435. MIZORAM i) MAX POWER REQUIREMENT 69 73 78 76 75 79 79 82 73 72 71 82ii) NET POWER AVAILABILTY 74 77 80 86 87 86 92 87 77 75 74 80iii) SURPLUS(+)/DEFICIT(-) 5 4 2 10 12 7 13 5 4 3 3 -2iv) SURPLUS(+)/DEFICIT(-) in % 7.25 5.48 2.56 13.16 16.00 8.86 16.46 6.10 5.48 4.17 4.23 -2.446. NAGALAND i) MAX POWER REQUIREMENT 86 73 120 123 108 92 125 105 111 117 107 115ii) NET POWER AVAILABILTY 80 89 100 106 110 108 114 98 84 82 81 85iii) SURPLUS(+)/DEFICIT(-) -6 16 -20 -17 2 16 -11 -7 -27 -35 -26 -30iv) SURPLUS(+)/DEFICIT(-) in % -6.98 21.92 -16.67 -13.82 1.85 17.39 -8.80 -6.67 -24.32 -29.91 -24.30 -26.097. TRIPURA i) MAX POWER REQUIREMENT 204 200 219 215 265 246 298 264 239 232 210 251ii) NET POWER AVAILABILTY 155 158 156 172 154 169 268 257 243 236 238 246iii) SURPLUS(+)/DEFICIT(-) -49 -42 -63 -43 -111 -77 -30 -7 4 4 28 -5iv) SURPLUS(+)/DEFICIT(-) in % -24.02 -21.00 -28.77 -20.00 -41.89 -31.30 -10.07 -2.65 1.67 1.72 13.33 -1.99

8. NORTH-EASTERN REGION i) MAX POWER REQUIREMENT 2096 2135 2300 2306 2360 2286 2364 2359 2324 2318 2135 2287ii) SIMULTANEOUS MAX DEMAND/ 1996 2033 2190 2196 2248 2177 2251 2247 2213 2208 2033 2178

REQUIREMENT CONSIDERING1.05 AS DIVERSITY FACTOR

iii) NET POWER AVAILABILTIY 1490 1594 1669 1827 1818 1810 2025 1842 1630 1586 1577 1674

iv) SURPLUS(+)/DEFICIT(-) -506 -439 -521 -369 -430 -367 -226 -405 -583 -622 -456 -504

v) SURPLUS(+)/DEFICIT(-) in % -25.35 -21.59 -23.79 -16.80 -19.13 -16.86 -10.04 -18.02 -26.34 -28.17 -22.43 -23.14

ABSTRACT OF STATEWISE/SYSTEMWISE/ POWER REQUIREMENT -vs-AVAILABILITY IN NORTH EASTERN REGION FOR THE PERIOD FROM APRIL' 2013 TO MARCH' 2014

NERPC, Shillong 7 LGBR 2013-14

Annexure-C.8

Annexure-C.8(Page 2/2)

(ALL FIGURES ARE IN MU)SL.NO. PARTICULARS Apr-13 May-13 Jun-13 Jul-13 Aug-13 Sep-13 Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14

1. AR. PRADESH

i) ENERGY REQUIREMENT 57.60 45.34 55.68 59.79 60.90 62.38 62.73 51.57 54.78 51.60 49.31 43.81

ii) NET ENERGY AVAILABILTY 29.75 43.38 51.87 71.35 71.60 56.52 49.91 38.39 34.39 31.22 27.83 33.17iii) SURPLUS(+)/DEFICIT(-) -27.85 -1.95 -3.80 11.55 10.70 -5.86 -12.82 -13.19 -20.39 -20.38 -21.47 -10.64iv) SURPLUS(+)/DEFICIT(-) in % -48.35 -4.30 -6.83 19.32 17.57 -9.39 -20.43 -25.57 -37.22 -39.49 -43.55 -24.282. ASSAM i) ENERGY REQUIREMENT 480.60 573.25 609.52 668.89 699.27 635.29 617.54 547.42 607.09 574.81 478.68 538.87ii) NET ENERGY AVAILABILTY 378.19 431.25 509.55 605.50 614.37 553.96 540.49 460.28 420.20 389.88 353.85 389.73iii) SURPLUS(+)/DEFICIT(-) -102.41 -142.00 -99.97 -63.40 -84.91 -81.32 -77.05 -87.13 -186.89 -184.93 -124.83 -149.13iv) SURPLUS(+)/DEFICIT(-) in % -21.31 -24.77 -16.40 -9.48 -12.14 -12.80 -12.48 -15.92 -30.78 -32.17 -26.08 -27.683. MANIPUR i) ENERGY REQUIREMENT 32.56 35.40 44.10 52.89 57.57 56.70 58.29 56.33 53.75 58.29 44.99 45.06ii) NET ENERGY AVAILABILTY 40.11 47.14 54.71 72.95 73.25 64.18 66.64 52.44 49.97 46.97 42.79 48.00iii) SURPLUS(+)/DEFICIT(-) 7.55 11.74 10.62 20.07 15.68 7.47 8.35 -3.89 -3.78 -11.32 -2.20 2.94iv) SURPLUS(+)/DEFICIT(-) in % 23.18 33.16 24.08 37.94 27.23 13.18 14.33 -6.91 -7.04 -19.42 -4.90 6.544. MEGHALAYA i) ENERGY REQUIREMENT 157.24 158.14 138.32 152.07 141.43 139.16 163.22 167.09 168.46 185.86 165.68 168.29iv) NET ENERGY AVAILABILTY 122.65 151.70 189.66 253.90 260.71 242.06 216.80 147.52 135.61 122.77 107.65 112.41v) SURPLUS(+)/DEFICIT(-) -34.59 -6.44 51.34 101.83 119.28 102.91 53.58 -19.56 -32.86 -63.09 -58.03 -55.89vi) SURPLUS(+)/DEFICIT(-) in % -22.00 -4.07 37.12 66.96 84.34 73.95 32.83 -11.71 -19.50 -33.95 -35.02 -33.215. MIZORAM i) ENERGY REQUIREMENT 29.60 33.21 32.17 37.38 38.36 36.95 39.25 38.77 36.44 37.05 32.44 38.08ii) NET ENERGY AVAILABILTY 29.41 34.60 41.76 50.64 50.36 43.98 50.21 43.40 41.83 40.33 37.53 40.98iii) SURPLUS(+)/DEFICIT(-) -0.19 1.40 9.60 13.26 11.99 7.03 10.96 4.63 5.40 3.28 5.09 2.90iv) SURPLUS(+)/DEFICIT(-) in % -0.63 4.21 29.83 35.48 31.26 19.03 27.91 11.95 14.81 8.85 15.70 7.616. NAGALAND i) ENERGY REQUIREMENT 44.71 34.12 48.64 54.78 47.46 56.63 59.87 53.25 47.33 53.83 44.08 46.74ii) NET ENERGY AVAILABILTY 30.04 37.45 50.35 66.19 69.42 62.29 56.86 43.42 39.05 35.31 32.20 35.54iii) SURPLUS(+)/DEFICIT(-) -14.67 3.33 1.70 11.41 21.96 5.67 -3.02 -9.82 -8.28 -18.52 -11.88 -11.19iv) SURPLUS(+)/DEFICIT(-) in % -32.81 9.77 3.50 20.83 46.26 10.01 -5.04 -18.45 -17.50 -34.41 -26.95 -23.957. TRIPURA i) ENERGY REQUIREMENT 88.94 99.12 91.90 102.89 111.31 107.21 110.03 97.19 106.16 112.21 84.84 103.83iv) NET ENERGY AVAILABILTY 59.82 66.56 73.49 88.21 88.51 79.53 110.16 102.84 100.90 96.91 87.85 97.09v) SURPLUS(+)/DEFICIT(-) -29.12 -32.56 -18.41 -14.68 -22.81 -27.68 0.12 5.65 -5.27 -15.30 3.01 -6.74vi) SURPLUS(+)/DEFICIT(-) in % -32.74 -32.85 -20.03 -14.27 -20.49 -25.82 0.11 5.82 -4.96 -13.64 3.55 -6.49

8. NORTH-EASTERN REGION i) ENERGY REQUIREMENT 891.25 978.57 1020.3 1128.7 1156.32 1094.3 1110.9 1011.60 1074.01 1073.64 900.02 984.67ii) NET ENERGY AVAILABILITY 689.98 812.09 971.39 1208.7 1228.2 1102.5 1091.1 888.29 821.94 763.38 689.71 756.92iii) SURPLUS(+)/DEFICIT(-) -201.27 -166.48 -48.93 80.05 71.90 8.22 -19.87 -123.31 -252.07 -310.3 -210.31 -227.75v) SURPLUS(+)/DEFICIT(-) in % -22.58 -17.01 -4.80 7.09 6.22 0.75 -1.79 -12.19 -23.47 -28.90 -23.37 -23.13

ABSTRACT OF STATEWISE/SYSTEMWISE/ ENERGY REQUIREMENT -vs-AVAILABILITY IN NORTH EASTERN REGION FOR THE PERIOD FROM APRIL' 2013 TO MARCH' 2014

NERPC, Shillong 8 LGBR 2013-14

8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 7 8 9Areas/Feeders affectedAug/13Jul/13

1.TRANSMISSION LINES

SN Name of Element Time

LIST OF APPROVED SHUTDOWN OF ELEMENTS FOR THE MONTH OF July-13 & Aug-13

220 kV Birpara-Salakat-I 0900 to 1700 Hrs insulator replacement220 kV Birpara-Salakat-II 0900 to 1700 Hrs insulator replacement220 kV Misa-Byrnihat-D/C132KV Imphal-Ningthoukhong (Manipur SEB)

Cont. SD:27.07.2013 (8:00 Hrs) to 30.07.2013 (16:00 Hrs)

132KV Imphal-Ningthoukhong (Manipur SEB)

132KV Loktak-Imphal-II line 8:00 to 16:00 Hrs 132KV Loktak-Imphal-II line

132KV Khliehriat-Khliehriat-I 8:00 to 16:00 Hrs 132KV Khliehriat-Khliehriat-I

Subject to concent from Manipur & LOKTAK generation will be backdown

132KV Khliehriat-Khliehriat-I 8:00 to 16:00 Hrs 132KV Khliehriat-Khliehriat-I

220KV Agia-BTPS line(AEGCL) 8:00 to 16:00 Hrs 220KV Agia-BTPS line(AEGCL)

132KV Kumarghat-PK Bari line 8:00 Hrs to 16:00 Hrs 132KV Kumarghat-PK Bari line

400KV Misa-Balipara-I 10:00 to 14:00 Hrs 400KV Misa-Balipara-I

400KV Misa-Balipara-II 10:00 to 14:00 Hrs 400KV Misa-Balipara-II

132KV Badarpur-Jiribam 8:00 to 16:00 Hrs 132KV Badarpur-Jiribam

ATC MAY BE AFFECTED

132KV Badarpur-Jiribam 8:00 to 16:00 Hrs 132KV Badarpur-Jiribam

132KV Silchar-Badarpur-I 8:00 to 16:00 Hrs 132KV Silchar-Badarpur-I

132KV Silchar-Badarpur-II 8:00 to 16:00 Hrs 132KV Silchar-Badarpur-II

220KV Salakti-BTPS-I 10:00 to 13:00 Hrs 220KV Salakti-BTPS-I

220KV Salakti-BTPS-II 10:00 to 13:00 Hrs 220KV Salakti-BTPS-II

132KV Dimapur-Imphal line 8:00 to 16:00 Hrs 132KV Dimapur-Imphal line

ATC MAY BE AFFECTED

ATC MAY BE AFFECTED

132KV Dimapur-Imphal line 8:00 to 16:00 Hrs 132KV Dimapur-Imphal line

400KV Balipara-Ranganadi-I Cont. SD: 09.07.2013(8:00 Hrs) to 10.07.2013(16:00 Hrs)

400KV Balipara-Ranganadi-I

400KV Balipara-Ranganadi-II 8:00 to 16:00 Hrs 400KV Balipara-Ranganadi-II

400KV Balipara-Bongaigaon-I(i)8:00 to 16:00 Hrs(ii)10:00 to 14:00 Hrs

400KV Balipara-Bongaigaon-IATC AFFECTED

400KV Balipara-Bongaigaon-II (i)8:00 to 16:00 Hrs(ii)10:00 to 14:00 Hrs 400KV Balipara-Bongaigaon-II

132KV Aizawl-Kolasib line Cont.SD: 18.07.2013 (8:00 Hrs) to 20.07.2013(16:00 Hrs) 132KV Aizawl-Kolasib line

132KV Umtru-Sarusajai line 132KV Umtru-Sarusajai line

132KV Umtru-Kahlipara line 132KV Umtru-Kahlipara line

132KV Khandong-Haflong line 9:00 Hrs to 13:00 Hrs 132KV Khandong-Haflong line

ATC AFFECTED

Cont.SD: 20.07.2013 (8:00 Hrs) to 21.07.2013(16:00 Hrs)

132KV Khandong-Haflong line 9:00 Hrs to 13:00 Hrs 132KV Khandong-Haflong line

132KV Gohpur-Nirjuli line 8:00 Hrs to 15:00 Hrs

2. SUBSTATION400KV Balipara Substation

400/220 KV, 315 MVA ICT 10:00 to 10:45 Hrs 400/220 KV, 315 MVA ICT

220/132KV, 50MVA ICT(NEEPCO) 8:00 to 16:00 Hrs 220/132KV, 50MVA ICT(NEEPCO)

0800 to 1500

132KV Khupi bay 8:00 to 16:00 Hrs 132KV Balipara-Khupi line

220/132KV Dimapur Substation

220/132KV, 100MVA ICT-1 8:00 to 16:00 Hrs 220/132KV, 100MVA ICT-1

132KV Dimapur(state) Bay 8:00 to 16:00 Hrs 132KV Dimapur-Dimapur line

400KV Bongaigaon Substation

CONCENT WILL BE GIVEN BY SLDC NAGALAND LATER

400KV Main Bus-1 8:00 to 16:00 Hrs All feeders shall remain in service through Bus-2

400KV Main Bus-2 8:00 to 16:00 Hrs All feeders shall remain in service through Bus-1

400KV Balipara-1 Main Bay 8:00 to 16:00 Hrs 400KV Balipara-Bongaigaon-I

400/220 KV, 315 MVA ICT 10:00 to 10:45 Hrs 400/220 KV, 315 MVA ICT

132KV Nirjuli Substation

33KV Feeder-I 8:00 to 16:00 Hrs 33KV Feeder-I33KV Feeder-I 8:00 to 16:00 Hrs 33KV Feeder-I

33KV Feeder-II 8:00 to 16:00 Hrs 33KV Feeder-II

33KV Feeder-IV 8:00 to 16:00 Hrs 33KV Feeder-IV

132KV Imphal(State) Substation

132KV Main Bus 6:00 Hrs to 8:00 Hrs i)132 KV Dimapur-Imphal line ii) 132KV Imphal-Loktak-II iii) 132KV Imphal-Imphal

132 KV Main Bus at Kopili HEP (NEEPCO)

9:00 to 13:00 Hrs

132KV PK Bari(TSECL) Substation

132KV Main Bus 9:00 to 14:00 Hrs All feeders connected to PK Bari(TSECL) S/s

132KV Haflong Substation

132KV Haflong bay 8:00 to 16:00 Hrs 132KV Haflong-Haflong(state) line

SUBJECT TO AVABILITY OF 132 kV P.K.BARI-DHARMANAGAR-DULLAVECHERRA

132KV Haflong bay 8:00 to 16:00 Hrs 132KV Haflong-Haflong(state) line

400KV Misa Substation

400/220KV, 315 MVA ICT-II 8:00 to 16:00 Hrs 400/220KV, 315 MVA ICT-II

132 kV PKBARI-dharamanagr 0900 TO 1600132 kV PKBARI-DHARAMANAGER133 kV R.C.Nagar-Kumarghat132 kV PKBARI-Kailshar

'0900 Hrs of 4th aug to 1600 Hrs of 05th Aug

: Daytime Shutdown

: Continuous ShutdownAnnexure - D.11 (i, ii &iii)

Exception Report

POWER GRID CORPORATION OF INDIA LIMITED

OPERATION SERVICE DEPARTMENT, NERTS, SHILLONG

MONTH : JUNE-13

OutageSl. No.

Restoration

Duration of Outage and Attributable To Name of the Element Ckt No

Reason of OutageCategory

Hrs. Mns.

Outage under categories of

Deemed Available

Hrs. Mns.

Sys.Const/Natural calamities/

Miltant activities

Hrs. Mns.

Other Constituents

Hrs. Mns.

POWERGRID

Date Time Date Time

BADARPUR_KOLASIB

1 00 00 00 52 00 00 OMSU: : :01/06/2013 10:41 01/06/2013 11:33Yph LA failure at 132/3KV Xformer bay at

Kolasib.00 00:

Sub-Total 00 00 00 52 00 00: : : 00 00:

BADARPUR-BADARPUR

2 00 00 01 42 00 00 OMSU: : :02/06/2013 17:15 02/06/2013 18:57Yph CT of Lumsnong bay at panchgram

blast00 00:

Sub-Total 00 00 01 42 00 00: : : 00 00:

BADARPUR_KHLIERIAT

3 00 00 00 00 00 00 LCSD: : :01/06/2013 08:06 01/06/2013 17:32SD taken for strengthening of jumpers along

the line for enhanced loadability09 26:

4 00 00 00 00 00 00 LCSD: : :02/06/2013 08:15 02/06/2013 16:58do08 43:

5 00 00 00 00 00 00 LCSD: : :03/06/2013 08:16 03/06/2013 17:07do08 51:

6 00 00 00 00 00 00 LCSD: : :04/06/2013 08:27 04/06/2013 16:10do07 43:

7 00 00 00 05 00 00 OMSU: : :12/06/2013 10:30 12/06/2013 10:35Tripped due to downstream fault00 00:

8 00 00 00 00 00 00 LCSD: : :22/06/2013 08:12 22/06/2013 16:44do08 32:

9 00 00 00 00 00 00 LCSD: : :23/06/2013 08:18 23/06/2013 15:44do07 26:

10 00 00 00 00 00 00 LCSD: : :24/06/2013 08:50 24/06/2013 16:54do08 04:

11 00 00 00 00 00 00 LCSD: : :25/06/2013 08:52 25/06/2013 16:19do07 27:

Sub-Total 00 00 00 05 00 00: : : 66 12:

BADARPUR_KUMARGHAT

12 00 00 00 00 09 52 GGDC: : :13/06/2013 08:09 13/06/2013 18:01SD taken for attending jumpers burnt during

overloading of the line00 00:

Sub-Total 00 00 00 00 09 52: : : 00 00:

DIMAPUR_IMPHAL

13 00 00 00 00 00 12 LNCC: : :14/06/2013 15:47 14/06/2013 15:59Tripped due to heavy lightning00 00:

14 01 18 00 00 00 00 OMST: : :16/06/2013 11:37 16/06/2013 12:55SD taken for clearing tree branch brought

near condr during storm00 00:

Page 1 of 5

OutageSl. No.

Restoration



Hrs. Mns.


Deemed Available

Hrs. Mns.


Miltant activities

Hrs. Mns.

Other Constituents

Hrs. Mns.

POWERGRID

Date Time Date Time

15 00 00 00 08 00 00 OMSU: : :17/06/2013 12:10 17/06/2013 12:18Tripped on protn against fault in LOK-

Ningthoukong line00 00:



Sub-Total 01 18 00 23 00 12: : : 00 00:

DOYANG_DIMAPUR # 1

17 00 00 00 00 00 00 SCSD: : :26/06/2013 10:51 26/06/2013 14:18SD taken for installation of Distance Protn

relay03 27:

Sub-Total 00 00 00 00 00 00: : : 03 27:

DOYANG_DIMAPUR # 2

18 00 00 05 00 00 00 OMSU: : :26/06/2013 13:08 26/06/2013 18:08CB auto tripped at Doyang end only, delay

in charging from Doyang end00 00:

19 04 21 00 00 00 00 OMST: : :29/06/2013 10:35 29/06/2013 14:56SD taken for rectification of Distance

Protection Relay00 00:

Sub-Total 04 21 05 00 00 00: : : 00 00:

GOHPUR_NIRJULI

20 00 00 00 00 00 23 LNCC: : :22/06/2013 08:22 22/06/2013 08:45Tripped due to reduced clearance with

landmass in between span 103-04(landslide)00 00:

Sub-Total 00 00 00 00 00 23: : : 00 00:

JIRIBAM_AIZWAL

21 08 50 00 00 00 00 OMST: : :20/06/2013 08:00 20/06/2013 16:50SD taken for repairing of condr in betn

loc.162-6300 00:

Sub-Total 08 50 00 00 00 00: : : 00 00:

JIRIBAM_LOKTAK # 2

22 00 11 00 00 00 00 LPPT: : :11/06/2013 10:53 11/06/2013 11:04tripped on lightning00 00:

23 00 00 00 16 00 00 OMSU: : :17/06/2013 12:10 17/06/2013 12:26Tripped due to fault in Lok-Ningthoukong

line00 00:

24 00 00 00 10 00 00 OMSU: : :19/06/2013 06:30 19/06/2013 06:40"00 00:

25 00 00 00 00 02 25 LNCC: : :28/06/2013 11:00 28/06/2013 13:25SD taken for clearing of tree fallen near

loc.148 during storm00 00:



Sub-Total 00 11 00 44 02 25: : : 00 00:

KHANDONG_HAFLONG

27 00 00 00 00 23 32 LNCC: : :04/06/2013 11:18 05/06/2013 10:50Yph Insulator decapped at loc.59 during

lightning00 00:

Sub-Total 00 00 00 00 23 32: : : 00 00:

KHANDONG_KHLIERIAT I

28 00 00 00 00 00 22 LNCC: : :19/06/2013 12:55 19/06/2013 13:17Tripped during heavy lightning00 00:

Page 2 of 5

OutageSl. No.

Restoration



Hrs. Mns.


Deemed Available

Hrs. Mns.


Miltant activities

Hrs. Mns.

Other Constituents

Hrs. Mns.

POWERGRID

Date Time Date Time

29 00 00 28 56 00 00 OMSU: : :29/06/2013 19:04 01/07/2013 00:00Bph CVT blast at Khandong end00 00:

Sub-Total 00 00 28 56 00 22: : : 00 00:

KHANDONG_KHLIERIAT # 2

30 00 00 00 00 00 22 LNCC: : :19/06/2013 12:55 19/06/2013 13:17Tripped during heavy lightning00 00:

Sub-Total 00 00 00 00 00 22: : : 00 00:

KHANDONG_KOPILI # 1

31 02 04 00 00 00 00 OMST: : :14/06/2013 13:17 14/06/2013 15:21for replacement of Density Monitor Switch

of CB at Kopili end00 00:

Sub-Total 02 04 00 00 00 00: : : 00 00:

KHLIERIAT_KHLIERIAT

32 00 00 00 04 00 00 OMSU: : :13/06/2013 15:09 13/06/2013 15:13Tripped on protn against fault in NEHU-

KHLT(MeECL) line00 00:

33 00 00 01 53 00 00 OMSU: : :14/06/2013 11:00 14/06/2013 12:53Tripped due to fault in Meghalaya system00 00:

Sub-Total 00 00 01 57 00 00: : : 00 00:

KUMARGHAT_R C NAGAR

34 00 08 00 00 00 00 LPPT: : :08/06/2013 13:47 08/06/2013 13:55Phase to Phase fault00 00:

Sub-Total 00 08 00 00 00 00: : : 00 00:

LOKTAK_IMPHAL # 2

35 00 00 00 00 02 43 GGDC: : :01/06/2013 10:59 01/06/2013 13:42Yph jumper at loc.115 burnt00 00:

36 00 00 00 10 00 00 OMSU: : :16/06/2013 11:55 16/06/2013 12:05Tripped due to downstream fault00 00:

37 00 00 00 10 00 00 OMSU: : :17/06/2013 12:10 17/06/2013 12:20tripped on protn against fault in LOK-




Sub-Total 00 00 00 40 02 43: : : 00 00:

NIRJULI-RANGANADI

39 01 12 00 00 00 00 LEFT: : :08/06/2013 13:17 08/06/2013 14:29Transient E/F00 00:

Sub-Total 01 12 00 00 00 00: : : 00 00:

KOLASIB-AIZAWL

40 00 00 00 39 00 00 OMSU: : :01/06/2013 09:10 01/06/2013 09:49Tripped due to fault in 132/33KV Xformer

at KOL S/s00 00:

41 00 00 00 52 00 00 OMSU: : :01/06/2013 10:41 01/06/2013 11:33Yph LA burst at 132/33KV Transformer bay

at KOLasib S/s00 00:

42 00 10 00 00 00 00 LEFT: : :24/06/2013 16:20 24/06/2013 16:30Transient E/F00 00:

Page 3 of 5

OutageSl. No.

Restoration



Hrs. Mns.


Deemed Available

Hrs. Mns.


Miltant activities

Hrs. Mns.

Other Constituents

Hrs. Mns.

POWERGRID

Date Time Date Time

43 00 00 08 53 00 00 OMSU: : :24/06/2013 16:30 25/06/2013 01:23Line could not be restored from

Kolasib(MSEB) end due to adverse weather 00 00:

Sub-Total 00 10 10 24 00 00: : : 00 00:

KHANDONG_KOPILI # 2

44 00 00 00 39 00 00 OMSU: : :29/06/2013 19:04 29/06/2013 19:43Bph CVT in Khlt-I bay at Khandong end

blast00 00:

Sub-Total 00 00 00 39 00 00: : : 00 00:

SILCHAR-BADARPUR-II #2

45 00 00 00 00 01 54 LNCC: : :04/06/2013 11:45 04/06/2013 13:39ESD taken for clearing of bamboos leaning

towards line after cyclone00 00:

Sub-Total 00 00 00 00 01 54: : : 00 00:

BALIPARA_TEZPUR

46 02 01 00 00 00 00 OMST: : :29/06/2013 17:54 29/06/2013 19:55SD taken for replacement of Yph CVT at

BLP end00 00:

47 00 00 03 13 00 00 OMSU: : :29/06/2013 19:55 29/06/2013 23:08line could not be restored due to Isolator

problem at Samaguri(AEGCL) end00 00:

Sub-Total 02 01 03 13 00 00: : : 00 00:

MISA_MARIANI

48 00 00 00 00 117 15 LNCC: : :01/06/2013 00:00 05/06/2013 21:15SD taken for shifting of conductor from

ERS to new towers at loc.678-79 ( due to 00 00:

Sub-Total 00 00 00 00 117 15: : : 00 00:

BALIPARA_BONGAIGAON # 1

49 00 08 00 00 00 00 LEFT: : :24/06/2013 22:07 24/06/2013 22:15left00 00:

Sub-Total 00 08 00 00 00 00: : : 00 00:

BALIPARA_BONGAIGAON # 2

50 00 00 00 00 00 00 SCSD: : :18/06/2013 11:35 18/06/2013 11:49Line opened for facilitating S/D of line

reactor at Balipara S/s(gasket replacement & 00 14:

Sub-Total 00 00 00 00 00 00: : : 00 14:

BALIPARA-RANGANADI # 1

51 00 00 00 00 00 00 LVRD: : :09/06/2013 01:09 10/06/2013 17:59H/T for vol. regu. On RLDC instruction vide

code 383840 50:

52 00 00 00 00 09 10 LNCC: : :22/06/2013 10:03 22/06/2013 19:13SD taken to facilitate erection of new tower

at loc.42 on Pile Foundation00 00:

53 00 00 00 00 00 00 LVRD: : :23/06/2013 05:08 23/06/2013 08:26h/T for vol. regu. On RLDC instruction vide

code 394603 18:

54 00 00 00 00 09 36 LNCC: : :23/06/2013 08:26 23/06/2013 18:02do00 00:


code 395507 38:

56 00 00 00 00 10 17 LNCC: : :24/06/2013 08:17 24/06/2013 18:34SD taken to facilitate shiftring of loc.42 on

Pile foundation00 00:

Page 4 of 5

OutageSl. No.

Restoration



Hrs. Mns.


Deemed Available

Hrs. Mns.


Miltant activities

Hrs. Mns.

Other Constituents

Hrs. Mns.

POWERGRID

Date Time Date Time


code 396906 58:

58 00 00 00 00 10 25 LNCC: : :25/06/2013 08:25 25/06/2013 18:50SD taken for shifting of loc.42 on Pile fdn00 00:


code 397908 02:



62 00 00 00 00 10 12 LNCC: : :28/06/2013 08:04 28/06/2013 18:16SD taken for shifting loc.42 on Pile

foundation00 00:

63 00 00 00 00 09 57 LNCC: : :30/06/2013 08:17 30/06/2013 18:14SD availed for shifting of loc.42 on Pile

foundation00 00:

Sub-Total 00 00 00 00 77 26: : : 66 46:

BALIPARA-RANGANADI # 2


code 382042 55:

65 00 00 00 00 09 05 LNCC: : :17/06/2013 10:20 17/06/2013 19:25SD taken to facilitate shifting of loc.42 on

Pile foundation00 00:

66 00 00 00 00 09 08 LNCC: : :18/06/2013 09:01 18/06/2013 18:09do00 00:

67 00 00 00 00 08 35 LNCC: : :19/06/2013 09:23 19/06/2013 17:58do00 00:

Sub-Total 00 00 00 00 26 48: : : 42 55:

Grand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand Total 20 263 1454 35: :: 23 179 : 34

Page 5 of 5

Exception Report of Bus Reactors

POWER GRID CORPORATION OF INDIA LIMITED

OPERATION SERVICE DEPARTMENT, NERTS, SHILLONG

MONTH : JUNE-13

OutageSl.

No.

Restoration



Hrs. Mns.

Outage under

categories of

Deemed Available

Hrs. Mns.

Sys.Const/Naturalc

alamities/ Miltant

activities

Hrs. Mns.

Other

Constituents

Hrs. Mns.

POWERGRID

Date Time Date Time

BR_BONGAIGAON (50MVAR) # 1

1 00 00 00 00 00 00 SCSD: : :15/06/2013 09:24 15/06/2013 13:08SD taken for testing & commissioning of

Control switching relay as per approval of 03 44:

Sub-Total 00 00 00 00 00 00: : : 03 44:

BR_SILCHAR(63MVAR) #2

2 00 00 00 00 00 00 SVRD: : :04/06/2013 18:07 05/06/2013 04:30h/T for vol. regu. On RLDC instruction vide

code 380410 23:


code 381109 51:


code 381915 20:


code 382404 25:


code 382806 01:


code 389904 31:


code 390642 30:

9 00 00 00 00 00 00 SVRD: : :19/06/2013 18:25 20/06/2013 00:28H/T for vol. regu. On RLDC instruction vide

code 392806 03:


code 393206 23:


code 393503 31:


code 394303 56:


code 396012 52:


code 397312 24:


code 3986101 15:

Sub-Total 00 00 00 00 00 00: : : 239 25:

BR_SILCHAR(63MVAR) #1


code 388756 34:


code 391104 36:

Page 1 of 2

OutageSl.

No.

Restoration



Hrs. Mns.

Outage under

categories of

Deemed Available

Hrs. Mns.

Sys.Const/Naturalc

alamities/ Miltant

activities

Hrs. Mns.

Other

Constituents

Hrs. Mns.

POWERGRID

Date Time Date Time


code 399304 40:


code 401005 01:

Sub-Total 00 00 00 00 00 00: : : 70 51:

Grand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand Total 00 00 0000 00: :: 00 314 : 00

Page 2 of 2

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