74th OCC Minutes

8/13/2019 74th OCC Minutes

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North Eastern Regional Power Committee

MINUTES OF THE 74th

OPERATION COORDINATION SUB-COMMITTEE MEETING

OF NERPC

Date : 08/06/2012 (Friday)

Time :10:30 hrs

Venue :Hotel Spice Route, Guwahati.

The List of Participants in the 74thOCC Meeting is attached at Annexure I

The meeting was started with welcome address by Shri N. C. Das, CGM, AEGCL. He

welcomed all the participants to the 74th OCC meeting and stated that ASEB is

honoured to host the 74thOCC meeting of NERPC in the Guwahati. Shri Das briefed

about the NER grid and mentioned that NER is dependent on power through ER

region. He requested all the participants to take part in the discussion to come to a

fruitful outcome of the meeting. He then requested Member Secretary I/C, NERPC

to proceed with the meeting.

Shri A.K. Mishra, Member Secretary I/C, NERPC welcomed all the participants to

the 74th OCC meeting and appreciated AEGCL for making nice arrangement forhosting the meeting.He informed the house that Shri B.Lyngkhoi has taken over

charge of SE (O) NERPC after his promotion and wished him all success in his new

assignment. He briefed about NER Power scenario of NER and stated that the last

month was very difficult & testing time for all. The Regional Energy requirement

had increased by about 6% & demand by about 2%, since NER grid experienced

about 100 MU energy short fall and 160 MW shortfall in demand. He informed

about a major grid disturbance occurred on 8/5/12 at 10:23 hours, causing

separation of NER grid from NEW grid and NER grid collapsed on load generation

mismatch. He appreciated RLDC who has made all efforts and restored the grid at

12:45 hrs. He expressed concerned about thelow level in most of the reservoirs in

the region and hence constituents have to plan their load management properly till

the hydro generations are picked up. He also stated that Palatana Project module#I

(363 MW) is likely to be commissioned in the month of July, 2012 and hence

requested all the constituents to be ready so that there should not be any


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Minutes of 74thOCC meeting held on 8thJune, 2012 at Guwahati

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transformation capacity & transmission constraints in evacuation of Power. He

informed the house about the share allocation from first module of Palatana Project

would be: Assam: 122 MW; Manipur : 22MW ; Meghalaya : 41MW; Nagaland :

14MW; Tripura : 100 MW; Arunachal Pradesh : 11MW; Mizoram : 11MW & OTPC:

50 MW. He requested NERLDC to carry out load flow study considering the first

module of Palatana Project and suggest remedial measures if any. He requested all

the constituents to provide the data to NERLDC as required by them for carrying

out the load flow study as early as possible.

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

take up the agenda items for discussion.

CONFIRMATION OF MINUTES OF 73rd MEETING OF OPERATION SUB-COMMITTEE OF NERPC.

SE(O), NERPC mentioned that the minutes of the 73rd OCC meeting held on 9th

May, 2012 at Imphal were circulated vide letter No. NERPC/AS/OCC/2012/1146-

1178 dated 21stMay, 2012.

No obse r v a t i o n s or c om men t s we r e r ec ei v ed f r om a ny o f t h e con s t i t u e n t s , t h e

m i n u t e s o f 7 3 r dOCC mee t i n g w as con f i r m ed .

SE (O), NERPC request ed NERLDC t o g i ve t h e p r esen t a t i on abou t t h e g r i d

p er f o rma n c e o f NER du r i n g t h e mon t h o f Ma y , 2 0 1 2 .

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, 12

The grid performance parameters for the month of May, 2012 as presented by

NERLDC during the meeting are given below:

i) Average frequencyduring May, 2012 was 49.76 Hz, as compared to 49.91 Hz inApril, 2012.

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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ii) Minimum frequency in May, 2012 was 48.82 Hz (16.05.12 at 22:07 hrs) ascompared to 49.08 Hz recorded in the previous month.

iii) Maximum frequency was 50.75 Hz (27.05.12 at 18:04 hrs), as compared to50.66 Hz in April, 2012.

iv) System frequencyremained within permissible range of 49.5 Hz to 50.2 Hz for88.14 % of the time, below 49.5 Hz for 10.56 % and above 50.2 Hz for 1.30% of

the time as compared to 93.66 %, 2.24% and 4.10 % respectively in the previous

month.

v) Regional peakdemand in May, 2012 was 1851 MW as compared to 1822 MW inApril, 2012, an increase of 1.6 % over the previous month.

vi) Energy requirementwas 906.13 MUs in May, 2012 compared to 856.37 MUs inApril, 2012, an increase of 5.70 % over the previous month.

vii)Regional energy availabilityin May, 2012 was 807.21 MUs compared to 763.66MUs in the previous month, an increase of 5.81 % over the previous month.

viii)Rise in demand met was recorded in Assam (7.23%), Mizoram (6.15%), Manipur(3.38%) & Tripura (3.39%) over the previous month.

ix) Drop in demand met was recorded in Nagaland (12.62%), Ar. Pradesh (4.97%) &Meghalaya (4.83%) over the previous month viz. April, 2012.

x) Over Voltages at 400 kV substations were observed at Misa and Balipara, wheremaximum voltage observed were 428 and 424 kV respectively. No over voltage at

220 kV S/S was observed.

xi) No over Voltages were observed at 132 kV S/S.xii)No under Voltages were observed at 400 kV S/S, 220 kV S/S. Under voltage,

observed at 132 kV S/S at Aizawl, was 120 kV.

xiii)Regional Generation & Inter-regional Exchanges during the month of May,2012 compared to April, 2012 are given below:

SN Parameter April, 2012 March, 2012

REGIONAL GENERATION & INTER REGIONAL EXCHANGES (in MU)

1 Total Generation in NER (Gross) 583.965 535.608

2Total Central Sector Generation

in NER (Gross)333.629 308.607

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Inter-Regional Energy Exchanges

(a) NER - ER 1.54 0.41(b) ER - NER 232.68 250.14

(c) Net Import 231.14 249.73

Th e Sub -comm i t t ee no t ed a s above.


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Meanwhile, POWERGRID has already arranged the tower from MeECL and applied

shut down during the period from 23.04.2012 to 04.05.2012 for Line # 1 and from

06.05.2012 to 14.05.2012 for Line # 2 to carry out restoration on permanent basis.

The proposed shut down has already been approved in 72nd OCC and thus, the

job is expected to be completed by 15th May 2012.

CM, POWERGRID informed that they have availed shutdown from 15.05.12 to

24.05.12 to complete the above work and started erection of tower. Unfortunately

the work has to be postponed due to mismatch of foundation and the same will be

completed by 20thJuly, 2012.

The sub-committee viewed it very seriously and stressed POWERGRID to complete

the above work as early as possible.


C. 4 Implementation of Single-Phase Auto-Reclosure (SPAR) scheme forTransmission Lines:

The OCC Sub-committee reviewed the issue pertaining to SPAR and the status as

indicated during the 74th OCC meeting are given below:

SN Name of the Line OwnershipStatus as given on 73rd OCC

meeting.

1 220kV Kopili - Misa # I & II KHEP, NEEPCOWill be installed with 2ndnumerical relay which is yet tobe received.

2 220kV Salakati BTPS - I & II BTPS, AEGCLCkt#I- will be completed afterbay shifting of NTPC BongaigaonCkt #II- 3rdJune, 12

3 220kV Balipara Samaguri Samaguri, AEGCL One year

4 132kV Khandong Haflong KHEP, NEEPCO Order for CBs have been placedand the work is likely to becompleted by June, 20125 132kV Khandong Kopili KHEP, NEEPCO



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C. 5 Restoration of LILO of 132 KV Dimapur (Nagaland) Kohima (Nagaland) lineat 220/132 KV Dimapur (PG) S/S.

During 73rdOCC, EE, Dept. of Power, Nagaland informed that he would take up

the matter with competent authority so that POWERGRID would be able to

complete the LILO work at the earliest. During the meeting representative from

Dept. of Power, Manipur had given their consent to extend power supply from the

132 KV Karong - Kohima during the commissioning of LILO work at Dimapur

S/stn of POWERGRID.

POWERGRID informed that still DoP, Nagaland has not given the consent for the

above work. Status could not be updated as Nagaland representatives were not

present. MS I/C, NERPC stated that NERPC will take up the issue with DoP,

Nagaland to restore the LILO at the earliest.

Th e Comm i t t ee no t ed a s above .

C. 6 VSAT Communication:

During 73rdOCC meeting, AGM, NERLDC informed that VSAT commissioning has

not been accepted by them since the equipment supplied by vendor are not as per

specification. Further, he informed that they have asked them to carry out the

work as per specification or else the contract would be terminated and they would

seek other vendors to carry out the same work.

DGM, NERLDC stated that the vendor is trying to establish the links. The status

will be intimated in next OCC meeting.


C. 7 Demand for Assam & Arunachal Pradesh:

NERLDC informed that demand for state for Assam & Arunachal Pradesh (area

wise demand) & for others off-peak and peak demand, Generation Pattern of

States, Generation Pattern of ISGS, Outage Planning of transmission elements,

outage planning of generation elements for fifth month i.e. June, 12 to Oct 12 is

necessary. This information is required for calculation of TTC/ATC to facilitate

STOA.NERLDC also informed that in line with the decision of 71stOCC meeting

they have sent reminders to all the constituents.


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Assam informed that they have already furnished the data to NERLDC. AGM,

NERLDC stated that Assam had furnished only the data up to June, 2012 and the

same process should be furnished to them for other next fifth month also. Assam

agreed.

C. 8 Machine Data for Dynamic Simulation for NER Power System :

NERLDC informed that during the 69th OCC meeting, they have intimated that

they would undertake dynamic study of NER system for ensuring security and

stability of the grid. For this purpose, technical data of all generating units are

urgently required (especially Assam, Meghalaya & Tripura & ISGS). Accordingly,

NERLDC had circulated the proforma during the meeting and requested all the

constituents to submit the relevant information by January, 2012, but none of the

constituents have submitted the information.

In the meeting NERLDC stated that they have sent reminders to all concerned for

furnishing the same, but till date no constituents have given the above

information. The house was also informed that in case any data is not available,

the information may be put as not available so that standard values may be

considered by NERLDC.

C. 10 Transformer Tap Optimization required to operate the system withinpermissible voltage limit

NERLDC informed that transformer tap data are required to carry out system

study for operating the system within permissible voltage limit. Further, the format

for furnishing relevant transformer data was distributed by NERLDC long back and

it was requested to furnish the relevant data by February, 2012.

All constituent had furnished the relevant information except Ar. Pradesh &

Nagaland.

C. 15 Furnishing of element wise Protection details.

In the 73rdOCC meeting, AGM, NERLDC informed that the Protection datails have

not been received from any of the constituents even after reminder. These data are

required for limit checking of elements while conducting offline load flow study in

NER grid. All power utilities of NER for furnishing of element wise relay setting

details.


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D.7A. Data required for determination of TTC/ATC for fifth month.

(a) Area wise peak and Off-Peak demand of Assam

-Dhaligaon area, Depota area, Gohpur area, Upper Assam area, South Assam

area and Rest of Assam.

(b) Area wise peak and Off-Peak demand of Arunachal Pradesh

-Ziro area, Itanagar area, Khupi area.

(c) Peak and Off-peak demand of other states

- Manipur, Meghalaya, Mizoram, Nagaland, Tripura.

(d) Peak and Off-peak Generation of states.

(e) Peak and Off-peak Generation of ISGS.

D.7C. Data required for Load Flow Study for evacuation of Pallatana Power

- Load Flow Study for evacuation of Pallatana Power considering the ground reality isessential. Accordingly the current/latest status in respect of the following are

required:-

1. Relay Setting Details at each end i.e. CT & PT tap setting for protection.2. Whether lines can be kept in loop.3. Maximum loading Capacity of lines.

- These data have to be furnished by the constituents of 132 kV pocket i.e. Assam,Meghalaya, Tripura, Mizoram and POWERGRID by 11thJune, 12.

The sub-committee requested all the utilities to submit the above data

regarding Item No. C.7, C.8, C.10, C.15, D.7A & D.7C to NERLDC in time and

moreover once agreed, they should abide by that and it should not carry as

follow-up action in every OCC meetings.

Member Secretary I/C requested all the constituents to bring to notice of

NERLDC about the difficulty faced while filling the required formats

circulated by NERLDC. NERLDC was also requested to come with all the

formats. The matter will be discussed in the next OCC meeting.


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C. 9 Looping arrangement of 132 KV Balipara Ranganadi - Nirjuli Gohpur -Balipara.

NERLDC informed that due to the grid problem which occurred due to tower

collapsed between ER and NER the test synchronization was deferred. He informed

that once the system is restored to normal, the test would be carried out.

NERLDC stated that the testing of looping arrangement will be carried out this

month and the status will be intimated in next OCC meeting.


C. 11 Powermap & Single Line Diagram (SLD) in NER.

In the 73rd OCC meeting, NERPC once again requested all Constituents,

particularly SLDCs, to submit the latest / updated Powermap (showing

geographical location, generating stations and interconnecting lines) & SLD of their

state covering 132kV and above voltage level as requested during the 71st OCC

meeting.

As suggested by the Sub-committee, NERPC had uploaded the current single line

diagram and powermap of the NER constituents in NERPCs website. Constituents

are requested to download the same form NERPCs website and do necessary

modification/updation, if any. The same may be sent to NERPC

Secretariat/handed over to NERPC in the next OCC meeting for compilation.

D.7B. Submission of data required for development of Power Atlas of NER & statesof NER

Letters vide Ref NERLDC/SOII/9767-81 dtd 19.03.12 & NERLDC/SOII/286-300

dtd 13.04.12 were sent to power utilities of NER for development of Power Atlas of

NER & states of NER by June, 2012 by NERLDC. The present status is as under:

- Manipur have furnished only power map & maximum demand met. Mizoram havefurnished power map & maximum demand met. Nagaland have furnished SLD,

power map, maximum demand met. Tripura have furnished SLD , maximum

demand met. Meghalaya have furnished SLD, Maximum, Minimum & Average

demand met, Hydro & Thermal Power Station details, Lines & Sub-Station details.

Assam have furnished SLD, maximum, minimum and average demand met,


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essential load, Hydro & Thermal Power Stations details, power map, Lines & Sub-

Station details. Arunachal Pradesh have furnished SLD, power map, maximum &

minimum demand met. POWERGRID have furnished Lines & Sub-Station details.

- Balance data from Assam, Arunachal Pradesh, Manipur, Meghalaya, Mizoram,Nagaland & Tripura to be furnished by 15thJune 12.

- AGBPP, AGTPP, Ranganadi, Kopili, Khandong, Kopili St II, Doyang, Loktak have tofurnish these data by 15thJune, 12.

Rega r d i n g I t em No . C.1 1 & D .7B a l l t h e c on s t i t u e n t s a g r eed t o f u r n i s h t h e

above da t a t o NERPC Sec r et a r i a t a s we l l as NERLDC a t t h e ea r l i e st .

C. 12 Status of completion of ongoing Transmission Lines in NER.

During the 73rd OCC meeting, NERPC Secretariat had circulated the proforma

regarding the status of various ongoing transmission schemes being

executed/implemented by POWERGRID/States/Other Agencies.

A l l t h e con st i t u e n t s a r e r eque st e d t o f u r n i s h t h e above da t a a t t h e ea r l i e st .

C. 13 Status of Generation Projects in NER

During the 73rd OCC meeting, NERPC Secretariat had circulated the proforma

regarding the status of Generating units to be commissioned/expected to be

commissioned by Central Utilities/States/Other Agencies.

A l l t h e con st i t u e n t s a r e r e que st e d t o f u r n i s h t h e above da t a a t t h e ea r l i e st .

C. 14 Review of Crisis Management Plan (CMP) of Ministry of Power

In the 73rd OCC meeting, NERPC stated that CEA vide their letter dated

27.04.2012 informed that Cabinet Secretariat periodically reviews the Crisis &

Disaster Management Plan (C&DMP) and during the last review in Ministry of

Power, it was indicated that updation/review is to undertaken in the months of

December and June. It is seen that only few utilities are submitting the reports of

mock drills to CEA. The utilities should conduct at least one mock drill during a


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quarter by creating emergent situation to which their plants/installations are

vulnerable and furnish the report to CEA. Further, it was mentioned that the

revised document on Crisis & Disaster Management Plan of the power sector to be

submitted by June, 2012.

Member Secretary (I/C) stressed to constituents to submit the report on mock drill

exercise to CEA. The format for submitting the data is enclosed at Annexure-C.14.

A l l c o n s t i t u e n t s a g r e e d t o d o t h e mo c k d r i l l e x e r c i s e a n d s u bm i t t h e

r e po r t s .

C. 16 Draft operating Procedure of NER:

In the 73rdOCC meeting, AGM, NERLDC informed that the latest Draft Operating

Procedure has been prepared by them and the same had been circulated to all the

constituents. He requested that any comments if any, should be given before

25.05.2012, otherwise, the same would be treated as final.

NERLDC informed that the document was finalized after incorporation of

comments/information received from NERPC, NEEPCO and NHPC as per

discussion on last OCC meeting. The document was sent to all the power utilities

of NER and the same was available on the website www.nerldc.org.


C. 17 Distribution of PSS/E Software application:

In the 73rdOCC meeting, AGM, NERLDC requested the constituents to nominate a

nodal officer with contact details including e-mail id for receipt of this PSS/E-

software and other matters relating to training, signing of license agreement etc.

NERLDC stated that they have not received the nominations from any constituents

except MeECL. SE(O), NERPC stressed the constituents to nominate their nodal

officers and receive the PSS/E-software, which will enable them to carry out load

flow studies of their system for PoC charges calculations.

A l l t h e c on s t i t u en t s a g r eed t o n om i n a t e t h e i r n o d a l o f f i c er a t t h e ea r l i e st .


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C. 18 Telemetry of Data:

In the 73rdOCC meeting, AGM, NERLDC stated that it has been observed that on

many occasion specially during disturbances; data from most of the locations are

not available due to 48 volt DCPS failures at important wide band locations like

Kopili, Misa Badarpur etc resulting in avoidable delays in restoration of the

system. He requested all the concerned party to ensure availability of data on

continuous basis.

SE (Comml), NERPC stated that all the constituents should maintain their battery

system in healthy condition and as per CEA regulation two sets of battery &

charger should be provided. Further he stressed that under ULDC scheme utility

should include one back-up battery bank for reliability.

A l l t h e co n st i t u e n t s a g r e ed t o k eep t h ei r b a t t er y s y st em h ea l t h y .

C. 19 FGMO/RGMO:

In the 73rd OCC meeting, AGM, NERLDC stated that as per direction of Honble

CERC all the Hydro generators above 10 MW capacity should have FGMO/RGMO

in operation. All concerned who have not yet implemented the same are requested

to kindly implement and give feedback at the earliest.

NERLDC stated that they have received the data from all the utilities.


C. 20 Running of State Estimator:

In the 73rd OCC meeting, AGM, NERLDC stated that due to non-availability of

data as required by NERLDC running of state estimator and achieving correct

estimated values has become very difficult. The same is very essential for

maintaining smooth operation in case of occasional RTU failures. He requested the

concern constituents to ensure data availability.

A l l t h e con st i t u e n t s ag r eed t o k eep t h ei r RTUs ava i l a b l e .


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C. 22 Low Voltage at Loktak S/Station:

During the 73rdOCC meeting, representative from NHPC stated that low voltage is

prevailing in Loktak S/Stn, even though there was no inductive load nearby

Loktak. They requested the Sub-committee to look into this and find out the

reason of low voltage.

NHPC representative stated that their site engineers are collecting the voltage

profile and will send it to NERLDC. Further, he stated that during peak hours due

to low voltage problem, field current has to be increased which leads to higher

current in generators and they gets tripped on over current. After detailed

discussion the sub-committee suggested NHPC to check their excitation system

and AVR settings. NHPC agreed to look into the matter and informed the status to

the sub-committee.


D. N E W I T E M S

D. 1 Proforma for Operational Statistics -NERPC

The proforma for operational Statistics are as given in Annexure below:

Annexure D.1 (i) Schedule Vs Actual Generation.

Annexure D.1 (ii) Peak Demand: Schedule Vs Actual.

Annexure D.1 (iii) Integrated Operation of the system.

Annexure D.1(iv) Details of DC, schedules and injections from Central sectorstations, drawal schedules and entitlements ofconstituents.

Annexure D.1 (v) Details of major reservoirs in NER.



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D. 2 State-wise anticipated peak demand/requirement, shortage for June, July,August, September & October, 2012.

Th e s u b-Comm i t t ee r evi ew e d & f i n a l i z ed t h e a n t i c i p a t e d p ea k

d emand / en e r g y r e q u i r em en t / A va i l a b i l i t y f o r t h e mon t h s o f J u n e , J u l y ,

A ugu s t , Sep t embe r & Oc t o ber , 20 12 .

A. Peak Demand

B. Peak Availability


S.No. State

Peak

Demand

(MW)

Jun 12

Peak

Demand

(MW)

Jul 12

Peak

Demand

(MW)

Aug 12

Peak

Demand

(MW)

Sep 12

Peak

Demand

(MW)

Oct 12

1 Ar. Pradesh 110 110 110 110 110

2 Assam 1050 1050 1100 1100 1150

3 Manipur 100 100 110 105 110

4 Meghalaya 260 260 270 265 270

5 Mizoram 70 70 70 70 75

6 Nagaland 105 105 105 110 110

7 Tripura 210 195 225 230 250

Region 1835 1890 1990 1990 2075

S.No. State

Peak

Availability

(MW)

Jun 12

Peak

Availability

(MW)

Jul 12

Peak

Availability

(MW)

Aug 12

Peak

Availability

(MW)

Sep 12

Peak

Availability

(MW)

Oct 12

1 Ar. Pradesh 70 65 110 110 110

2 Assam 800 800 1050 1050 1050

3 Manipur 70 70 100 105 105

4 Meghalaya 190 185 200 210 2205 Mizoram 45 40 70 70 70

6 Nagaland 75 70 100 105 105

7 Tripura 130 120 170 165 175

Region 1380 1350 1800 1815 1835


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D. 3 Generation Planning (ongoing and planned outages)

The daily availability for hydro stations as given in the meeting is given below.

Khandong 0.132 MU

Kopilli 0.490 MU

Ranganadi - (subject to inflow)

Doyang 0.099 MU

Loktak - 0.315 MU

There was no shutdown proposal for generating station/units from any of the

constituents.


D. 4 Outage Planning Transmission elements

The Sub-committee stressed all the utilities to submit the shutdown proposal

latest by 30th of preceding month. After detail discussion the sub-committee

approved the shutdown proposal for May/June, 2012 as given in Annexure D.4.


D. 5 Estimated Transmission Availability Certificate (TAC) for the month ofJanuary, 2012.

The Estimated Transmission/System Availability for the month of May, 2012

furnished by PGCIL is 99.9619 % as per details at Annexure D. 5. NER

constituents were requested to give their comments and observations, if any, by

29thJune, 2012 so that Final TAC for the month of May, 2012 can be issued.

Th e sub -Comm i t t ee no t ed as a bove.

D. 6 Major grid disturbances in the previous month (May, 2012 )

There was one major grid disturbance of category GD-V during the month of May,

2012. The sub-committee discussed the cause of the disturbance in detail. The

detail study on the disturbance is attached at Annexure D.6.



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D. 7 Agenda items by NERLDC

D. Draft List of Important Elements of NER

- As per clause no 5.2. c of IEGC, List of Important Grid Elements of NER has beenprepared by NERLDC and uploaded in their website.

- All are requested to furnish comments & views, if any.

A l l t h e con st i t u e n t s ag r eed t o go t h r o ugh t h e l i s t o f Gr i d E l emen t s o f NER

and w i l l g i v e t h ei r c omm en t s, i f a n y .

E. Voice & Data Communication and SCADA integration i.r.o. Pallatana projectand ATS

- The issue has been taken up at RPC forum for ensuring the same & follow upaction also taken up by NERLDC. Status may be confirmed by respective

organizations (OTPC/CTU).

DGM, NERLDC stated that voice & Data communication and SCADA integration for

Palatana Project and its ATS is required to be completed for grid operation as the

project is scheduled to be commissioned by July, 2012. The status could not be

updated as OTPC & NETC representatives were not present. The status would be

reviewed again in the next OCC meeting.


F. Schedule of commissioning of bays, lines reactors, transformers along withresponsibilities i.r.o. Pallatana Project and ATS

- Details of responsibilities of different organizations at different locations i.r.o.installation & commissioning of bays, lines, reactors, transformers etc alongwith

schedules of commissioning are required for better co-ordination.

A l l t h e con st i t u e n t s ag r eed t o f u r n i s h t h e above i n f o rm a t i o n t o NERLDC.


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G. UFR load shedding in NER-

- NLDC requested for enhancing the UFR load shedding quantum to 500 MW in NERto arrest frequency fall. Members may please discuss.

Th e sub -c omm i t t e e h a s no t a g r eed t o enh an ce t h e UFR l o ad shedd i n g t o 500

MW i n NER a s t h e ma x imu m demand o f t h e r eg i o n i s on l y a b ou t 2 1 0 0 MW .

D. 8 Date & Venue of next OCC meeting

It is proposed to hold the 75thOCC meeting of NERPC on 6thJuly, 2012 (Friday). As

per roster POWERGRID would be the host for 75thOCC meeting.

POWERGRID informed that the venue would be intimated soon to NERPCSecretariat.

The meeting ended with thanks to the Chair.

*******


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Annexure-I

List of Participants in the 74thOCC meeting held on 08/06/2012

SN Name & Designation Organization Contact No.

1. No Representative Ar. Pradesh

2. Sh. N. C. Das, CGM, AEGCL Assam

3. Sh. A .C. Sharma, CGM, UAZ Assam 09435061838

4. Sh.M.K.Sarma, DGM, APGCL Assam 09864072816

5. Sh. D. Kalita, AGM, AEGCL Assam 09435121605

6. Sh. J. Baishya, DGM, AEGCL Assam

7. Sh.D. Bhagawati, AGM, CAR Assam 09864012509

8. Sh. K. Goswami, AGM, Comml Assam 09864020019

9. Sh. M.K. Adhikari, DGM, Comml Assam 09864049287

10. Sh. M.K. Chetri, SE (T&T), HQ Meghalaya

11. Sh. F. Kharshiing, EE, SLDC Meghalaya 09863066960

12. Sh. H. Lalnunsanga Mizoram

13. No Representative Manipur

14. No Representative Nagaland

15. Sh. Debabrata Pal, Sr. Manager Tripura 09436500244

16. Sh. S.B.Debbarma, Manager Tripura 09436453401

17. Sh. N.R.Paul, DGM NERLDC 09436302723

18. Sh. Anupam Kumar, Engineer. NERLDC 09436335379

19. Sh. P. Kanungo, CM NERTS 09436302823

20. Sh. B. Goswami, Sr. Mgr. (O&M) NEEPCO 09436163983

21. Sh. B. B. Das, Sr. Mgr. (E) NEEPCO 09436304964

22. Sh. Y. Surjamani Singh, Mgr. NHPC 09436894857

23. Sh. A.K. Mishra, Member Secretary I/C NERPC 09402134275

24. Sh. S.K. Ray Mohapatra, SE (Coml) NERPC 09818527857

25. Sh.B. Lyngkhoi, SE (O) NERPC 09436163419

26. Sh. D.K. Bauri, EE NERPC 09863317236

.ooOoo.


21/22

Annexure-D.4

Shutdown Programme for the month of June, 2012

as approved in the74th OCCM held on 08.06.2012 at Guwahati.

S/D PROGRAM FOR POWERGRID TRANSMISSION LINES & ITS ASSOCIATED BAYS:

S/N Name of Tr. Lines Date Time PurposeAreas / Feeders

Affected

1 132kV Haflong -Jiribam 14.06.12 to25.06.12 Continuous S/D

For shifting of vulnerable

location No. 157 affectedby landslide

132kV Haflong -Jiribam

2132kV Aizawl-

Jiribam

26.06.12 to

03.07.12Continuous S/D

For shifting of vulnerablelocation No. 197 affected

by landslide

132kV Aizawl-

Jiribam

3

220 kV Misa-Kopili-I(Subject toavailability of

other 2 ckts)

17.06.12 to27.06.12

8:00 to 16:00 Hrs

Shutdown required for

replacement of defective

insulator strings.

220 kV Misa-Kopili-I

4

220 kV Misa-

Kopili-II(Subject to

availability ofother 2 ckts)

28.06.12 to

08.07.12

08:00 to 16:00 Hrs

Shutdown required for

replacement of defective

insulator strings.

220 kV Misa-

Kopili-II

5400kV Balipara-

Bongaigaon-I

12.06.12 to

19.06.1208:00 to 16:00 Hrs To facilitate shifting of

208-loc.211 of the linenecessitated as a result of

Railway Tract Gauge

Conversion being carriedout by Indian Railways.

400kV Balipara-

Bongaigaon-I

6400kV Balipara-

Bongaigaon-II

20.06.12 to

27.06.1208:00 to 16:00 Hrs

400kV Balipara-

Bongaigaon-II

7132 kV Badarpur

-Jiribam

12.06.12 to

13.06.1208:00 to 16:00 Hrs

To facilitate stringing of

132 kV Silchar-Hailakandi

line

132 kV Badarpur -

Jiribam

S/D PROGRAM FOR AEGCL TRANSMISSION LINES & ITS ASSOCIATED BAYS:

8220kV Agia

Sarusajai I&II29.06.12 to

08.07.1208:00 to 16:00 Hrs Maintenance Works

220kV Agia

Sarusajai I&II

9132 kV Dimapur-

Bokajan12.06.12 09:00 to 16:00 Hrs Maintenance Works

132 kV Dimapur-

Bokajan

S/D PROGRAM FOR AEGCL SUB-STATIONS / BAYS / ICTS/ REACTORS

S/N Name ofElements

Date Time Purpose Areas / FeedersAffected

Sarusajai S/S

1220 kV SarusajaiBus

10.06.12 07:00 to 15:00 HrsRepairing & Maintenance

Works220 kV SamaguriBus

Samaguri S/S

2220 kV Samaguri

Bus I &II

In consultation

withNERLDC

For 2:30 HoursMaintenance of weak jumpers

& brunt clamps

220 kV Samaguri

Bus I &II


22/22

Annexure-D.4

S/D PROGRAM FOR POWERGRID SUB-STATIONS / BAYS / ICTS/ REACTORS

S/N Name of

Elements

Date Time Purpose Areas / Feeders

Affected

Balipara S/S

3

220/132 kV, ICT

(NEEPCO)Subject to consentof Ar. Pradesh

19.06.12 to21.06.12 08:00 to 16:00 Hrs Annual Maintenance Works

220/132 kV, ICT

(NEEPCO)

4

132 kV Khupi Bay

(NEEPCO)Subject to consent

of Ar. Pradesh

One day alongwith the above

S/D08:00 to 16:00 Hrs Annual Maintenance Works

132 kV Khupi Bay

(NEEPCO)

Bongaigaon S/S

5

400kV, 50 MVARBus Reactor-IISubject to real time

conditions

18.06.12 09:00 to 17:00 HrsInstallation of LA in view of

change in design parameters

400kV, 50 MVAR

Bus Reactor-II

Nirjuli S/S (Subject to conscent of Ar. Pradesh)

6 10 MVA, 132/33kV ICT-I 11.06.12 08:00 to 16:00 Hrs 10 MVA, 132/33 kVICT-I

710 MVA, 132/33kV ICT-II

12.06.12 08:00 to 16:00 Hrs10 MVA, 132/33 kVICT-II

S/D PROGRAM FOR NEEPCO SUB-STATIONS / BAYS / ICTS/ REACTORS

8

Kopili Switch yard

(old portion)(Unit #IV will beavailable to grid

through 132 kVSystem by

sectionalizing the bus)

Three days (inconsultation

withNERLDC)

09:00 to 19:00 Hrs

Replacement of R-PhaseMOCB of Kopili-Misa-III

along with replacement ofsupport insulator of jumper etc.

Kopili Switch yard

(old portion)

74th OCC Minutes

Documents

Transcript of 74th OCC Minutes