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System Planning DepartmentCurrently, Grid Impact Study (GIS) for new generation projectsis the main focus of System Planning Department (SPD). heGIS analy!es the effect of new connection to "#$ Grid toensure satisfactory operation of the "#$ Grid in conformitywith the "#$ Grid Code% re&uirement for additionaltransmission lines, reinforcement in the networ', andre&uirement for the installation of capacitors and reactorsare recommended.

SPD also identifies constraints in the grid that could poseoperational ris' and that reduces efficiency due to outagesin the Integrated "epal Power System (I"PS). SPD alsodeelops transmission configurations for eacuating powerfrom planned generation projects. or this, different technicalstudies such as load flow, short circuit, steady and transientsta*ility are carried out.

$s a part of the preparation of the Corporate DeelopmentPlan +-, SPD prepared "#$/s new 0oad orecast for thene1t + years starting 2 +-+3- incorporating Goernmentof "epal/s macro4economic indicators and "#$/s target newconnection rates. $ short term monthly Capacity and #nergy5alance was also prepared considering the new load forecast,

e1isting projects, projects that are firmly in place forimplementation as well as the scope for import.

SPD also assists other departments of "#$ *y proidingnecessary data and gie suggestions regardingimplementation of planned projects. he department wasalso actiely inoled in the 6IC$ assisted "ationwide 7aster

Transmission and System Operation

Business Group

  ransmission and System 8peration 5usiness Group is entrusted with the 'ey responsi*ilities of  generation and transmission system planning, system operation, operation and maintenance of  national grid and trading of power. It is headed *y a General 7anager. he System Planning Department  carries out load forecasting, generation e1pansion planning and transmission system planning of  the power system of "epal while System 8peration Department performs the operation planning  and real time system operation. Similarly, Grid 8peration Department carries out oerall operation  and maintenance of national grid and Power rade Department e1ecutes the trading of power with  Independent Power Producers and also carries out the *usiness actiities of power e1change and

  trading of power with India.

Plan Study on Storage4type 9ydroelectric Power Deelopmentin "epal that is *eing studied *y 64Power as the consultant.In 2 +-+3-, System Planning Department carried outnum*er of technical studies at the re&uest of "#$/s differentdepartments. "ota*le among them are:

0oad flow analysis of 0ahan4;upani transmission line.

ransmission line study for Samundratar4rishuli 9u*.

ransmission line study for 5ha'tapur45aneswor -+'<underground ca*le transmission system.

0oad flow study of =pper rishuli /$/ 9ydroelectricProject.

0ine energi!ation and synchroni!ation study for theChamelia ( 7>) 9ydropower Project.

Preliminary transmission system study for the >est SetiStorage 9ydropower Project (?@ 7>)

A+"epal #lectricity$uthority

$ 2#$; I" ;#<I#> 4ISC$0 2#$; +-+3-

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In 2 +-+3-, System Planning Department completed Grid Impact Study for the following hydropower projects to *edeeloped *y the priate sector.

0ist of GIS conducted projects in 2 +-+3-

S.".

-+A@B?----+--A-@-B-?--++-++++A+@+B

+?

"ame of Projects

Puwa Ehola4-0ower Solu 9PP6ogmai Ehola S9PPGhatte Ehola 9PP7aya Ehola 9PPEhare Ehola 9#P"yam "yam Ehola S9PP=pper Solu Ehola 9PP=pper 5alephi4$ 9#P5alephi4$ 9#PIwa Ehola 9PP7ai Cascade Ehola S9PP=pper Ehimti4II 9PP5agamati S9PP5u'u Ehola S9PPSisa Ehola F$F S9PPSardi Ehola 9#PEhani Ehola - 9PPSolu Ehola (Dudh'oshi) 9#P=pper rishuli4- 9PPEaruwa Ehola 9PP;upse EholaDar*ang 7yagdi Ehola 9#P=pper Piluwa Ehola 4 + 9PPSa*ha Ehola4$ 9PP=pper Daraudi4- 9#P

=pper 9ewa Ehola S9PP

Capacit ( 7>)

  @  +  ?.B  @  -A.  +A.-  B  -  B  -.B  .    ?  +  B  +.  A  A  B  +-B  +  A  +@  A.?+  .  -

  .@

Connection Su*station

  Goda' su*station.  ingla su*station.  Goda' su*station.  Singati su*station  5aneshwor su*station  Singati su*station  rishuli 5 9u* su*station  ingla su*station.  0amosangu su*station.  5ara*ishe su*station.  Ea*eli su*station  Goda' su*station.  Garjang su*station  Eule'hani I switchyard  Garjang su*station  Solu 9#P switchyard  9emja (5ans'ot) su*station  Singati su*station  ingla su*station.  rishuli 5 9u* su*station  9emja (5ans'ot) su*station  Dana su*station  Dana su*station  5aneshwor Su*station  5aneshwor Su*station  "ew 7arsyangdi su*station

  5aneshwor Su*station

Grid Impact Study for the *ul' load of -+ 7> of GhorahiCement Industry to *e connected at 0amahi su*4station wasalso carried out.

System 8peration Department$s in the past years, 0oad Dispatch Centre has *een wor'inground the cloc' to 'eep the operation of the Integrated "epalPower System (I"PS) on the right trac' through the use ofcomputer *ased Superisory Control and Data $c&uisition(SC$D$) system.

he aaila*ility of real time data and *etter communicationsystem hae improed the oerall aaila*ility of power stationsand transmission lines and has helped to minimi!e the timere&uired for restoration of the power system in case of *lac'4outs, there*y reducing loss of reenue. he total completesystem outage time has *een reduced significantly from-,-@ minutes in 2 +--3-+ to @A minutes in 2 +-+3-.0oad shedding was restricted to a ma1imum A hours perwee' per customer as against the anticipated --+ hours perwee' per customer.

A "epal #lectricity

$uthority

$ 2#$; I" ;#<I#> 4ISC$0 2#$; +-+3-

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AA"epal #lectricity$uthority

  $ 2#$; I" ;#<I#> 4 ISC$0 2#$; +-+3-

or the continued smooth functioning of the system, it isnecessary that the data ac&uisition from the power stationsand su*stations *e updated according to the latestchanges3modifications in the respectie stations. he trainedmanpower in the 0DC has *een a*le to 'eep the data up4to4date in the SC$D$ software in the 0DC. 5esides the regular

maintenance wor's, new *ays from upgraded su*stations,new power stations 0ower 7odi 5ijayapur, new su*stationsPathlaiya Syangja hae *een integrated into the SC$D$software. $round ;s.- million reenue is *eing receiedannually *y leasing (to "epal elecom and other priatecompanies) the fi*ers from the fi*er optic ca*le.

Grid 8peration Departmenthe Grid 8peration Department is responsi*le for transmittingrelia*le and &uality power from distant generators to ariousload centers. It also proides connection facilities to IPPs and5ul' Consumers at different oltage leels *y entering intoConnection $greement as per the "#$ Grid Code. $nothermain function of the Department is to loo' after the operation

of BB '< -+ '< su*stations and transmission lines *ycarrying out routine and *rea'down maintenance such as:up4gradation, e1tension, replacement and reha*ilitationwor's including installation of necessary reactiecompensation e&uipment. =nder this Department there arediision offices in Eathmandu, 9etauda and 5utwal and*ranch offices in Duha*i, Po'hara and $ttaria.

7ajor >or's performed in 2 +-+3- are as

follows:

a. ransformer =pgrading, Compensation and

  Su*station ;einforcement >or's (Completed)  his department has e1ecuted num*er of transformer  reinforcement and upgrading wor's in arious  su*stations. =p4gradation and reha*ilitation of power  system e&uipment and installation of shunt capacitor  *an's in different su*stations are *eing carried out to  cope with the increased demand and low oltage leel,  ransformers that are *eing replaced are installed in  other su*stations after necessary oerhauling and  maintenance. ;elocation of power transformers in  different su*stations is a cost effectie way of load  management. he department has also completed some  of the connection facilities for eacuating power from  power plants owned *y the Independent Power

  Producers (IPPs).

  <arious wor's e1ecuted *y this department hae  supported to reduce forced outage rate caused *y  inade&uate transformation capacity. he department

carried out and completed following major up4gradation  and reinforcement wor's in 2 +-+3-.

4 ;eplacement of e1isting -+3 '<, ?.@ 7<$ transformer  at 0amahi S3S with a new 7<$ transformer.4 Installation of new -+3 '< transformer *ay and  shifting of ?.@ 7<$ transformer from $ttaria S3S at 0am'i

  S3S.4 Shifting of 3-- '<, + 1 ?.@ 7<$ transformers from  $narmani S3S each to $ttaria S3S and 0am'i S3S.4 Shifting of 3-- '<, 7<$ transformer from $ttaria S3S  to 0amahi S3S.4 ;eplacement of -+3 '<, ?.@ 7<$ transformer at $ttaria  S3S with a - 7<$ transformer.4 ;einforcement of circuit *rea'ers at arious su*stations.4 Installation of fre&uency relays at arious su*stations.4 ;epair and Installation of 3-- '<, @ 7<$ transformer  at Dhal'e*ar S3S.

*. ollowing major up4gradation reinforcement wor's for su*station are

initiated and are currently under progress4 Installation of new -+3 '<, 7<$ transformer *ay  at Chandranigahpur S3S.4 Installation of new BB3-- '<, ++.@ 7<$ - 7<$  transformer *ays at Cha*el and Patan S3S respectiely.4 Installation of new 3-- '<, -B.B 7<$ transformer to  replace e1isting 7<$ transformer at Chanauta S3S.4 Installation of new -+3 '<, B 7<$ transformer *ay  at Duha*i S3S.4 Installation of new -+3-- '<, 7<$ transformer at  Po'hara S3S.4 Installation of new 3-- '<, -B.B 7<$ transformer at  Damauli S3S.4 Installation of new 3-- '<, -B.B 7<$ transformer at

  Eohalpur S3S.4 Installation of new 3-- '<, -B.B 7<$ transformer at  $ttaria S3S.4 Installation of new 3-- '<, -B.B 7<$ transformer at  Dhal'e*ar S3S.4 Installation of new 3-- '<, -B.B 7<$ transformer at  5utwal S3S.

c. ;elay esting and #nergy 7eter esting >or's  esting and cali*ration of more than +A energy meters  hae *een carried out *y the 7eter esting Group of this  Department in arious Grid su*stations including some  of the meters installed in power plants owned *y the  IPPs.

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A@ "epal #lectricity

$uthority

$ 2#$; I" ;#<I#> 4 ISC$0 2#$; +-+3-

d. Grid Connection $greement  he Department has entered into the Grid Connection  $greements with IPPs with a total com*ined capacity  of ?.?+ 7>.

e. ;outine 5rea'down 7aintenance >or's  ;outine 7aintenance wor's were carried out as per  schedule for su*stations and transmission lines.  5rea'down 7aintenance wor's were also carried out as  per re&uirement.

Power rade DepartmentPower rade Department is responsi*le for trading of electricpower *oth in domestic and cross *order mar'et. It is thesingle window interface of "#$ with Independent PowerProducers (IPPs) for processing their application for PowerPurchase $greement (PP$). unctions of Power radedepartment may *e *roadly classified into three categories:

a. PP$ processing and #1ecution unction:

  his function coers PP$ processing actiities up to and  including its e1ecution.

*. PP$ Implementation and 7onitoring unction:  his function includes PP$ administration after its  e1ecution till commercial operation.

c. 8perational $dministration unction of PP$s:  his function includes PP$ administration after  commercial operation.

$ total of projects deeloped *y the IPPs with theircom*ined capacity of A-,? '> were commissioned in 2

+-+3-. his is a significant num*er as compared to thepreious year. Projects that were commissioned are: 5ijayapur4- (A,A- '>), Solar Power Station (BA. '>), Siuri Ehola(A,@ '>), 0ower 7odi4- (, '>), Siprin Ehola (,B@ '>),Cha'u Ehola (-,@ '>), 7iddle Cha'u (-, '>) , adi Ehola(hapre') (@, '>) and Charnawoti Ehola (,@+ ' >). >ith

these nine projects, the total num*er of IPP owned projectsthat are in operation reached with their com*ined installedcapacity of ++ 7>. Similarly +B projects of IPPs with theircom*ined capacity of ? 7> were noted to *e underconstruction.

During 2 +-+3-, A new PP$s with their com*ined capacity

of +A 7> were concluded. >ith this, the total num*er ofPP$s concluded so far till 2 +-+3- stands at -A@ with theircom*ined capacity -,+ 7>.

$part from @ 7> import under the Power #1change$greement with India, a short term PP$ for the import of +7> power from 6anuary -, +- to $pril , +- wasconcluded with PC India 0imited.