minutes of 89th occm

8/13/2019 Minutes of 89th OCCM

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No. NERPC/SE (O)/OCC/2013/ 5259-88 Dated: September 18, 2013

To,1. Managing Director, AEGCL, Bijuli Bhawan, Guwahati 781 0012. Director (Distribution), Me. ECL, Lumjingshai, Short Round Road, Shillong 793 0013. Director(Transmission), Me.PTCL, Lumjingshai, Short Round Road, Shillong 793 0014. CGM, (LDC), SLDC Complex, AEGCL, Kahelipara, Guwahati-781 0195. 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 1118. Engineer-in-Chief (P&E), Department of Power, Govt. of Mizoram, Aizawl 796 0019. Chief Engineer (P), Electricity Department, Govt. of Manipur, Keishampat, Imphal 795 00110.Chief Engineer (P), Department of Power, Govt. of Nagaland, Kohima 797 001 11.General Manager, TSECL, Agartala 799 00112.ED (O&M), NERTS, PGCIL, Dongtieh-Lower Nongrah, Lapalang, Shillong -793 00613.ED (O&M), NEEPCO Ltd., Brookland Compound, Lower New Colony, Shillong-79300314.ED (Commercial), NEEPCO Ltd., Brookland Compound, Lower New Colony, Shillong-79300315.ED (O&M), NHPC, NHPC Office Complex, Sector-33, Faridabad,Haryana-12100316.GM (Plant), OTPC, Badarghat Complex, Agartala, Tripura - 79901417.GM, NERLDC, Dongtieh, Lower Nongrah, Lapalang, Shillong -793 00618.Member Secretary, ERPC, 14 Golf Club Road, Tollygunge, Kolkata-70003319.Chief Engineer, GM Division, Central Electricity Authority, New Delhi 110066

Sub: Minutes of the 89thOCC Meeting held on 13thSeptember, 2013 at Shillong.

The Minutes of the 89thOCC Meeting of NERPC held on 13.09.2013 at Shillong Club,Shillong 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

/ Yours faithfully,

. / B. Lyngkhoi

/ Superintending Engineer

/ OperationCopy to:

Government of India

Ministry of Power

North Eastern Regional Power Committee

-. Meghalaya State Housing Finance Co-Operative Society Ltd. Building

, - Nongrim Hills, Shillong 793003.

ISO 9001:2008

Ph. No: 0364 - 2520050

Fax No: 0364 - 2520030Website: www.nerpc.nic.in


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North Eastern Regional Power Committee

MINUTES OF THE 89th

OPERATION COORDINATION SUB-COMMITTEE MEETINGOF NERPC

Date : 13/09/2013 (Friday)

Time :10:00 hrs

Venue :Shillong Club, Shillong.

The List of Participants in the 89thOCC Meeting is attached at Annexure I

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

I/C, NERPC. He welcomed Shri H.C. Phukan, CGM (LDC), AEGCL; Shri Mukul

Banerjee, GM (Plant), OTPC; Shri A. Patir, GM, NERTS and Shri T.S Singh, GM,NERLDC and stated that the forum will be benefited in resolving many important

issues by the presence of senior officers of constituents. He highlighted the forum

about the important decisions of the recently concluded 14th TCC meeting which

was held on 4thSeptember, 2013 at Agartala. Since NERPC meeting could not be

held due to unavoidable circumstances, the minutes of 14 th TCC has been

circulated to all the NERPC members as directed by Chairman, NERPC & Honble

Power Minister, Govt. of Tripura for approval. Some of the important decisions

taken during the 14thTCC meeting are the setting up of SLDCs in four (4) states

[Ar. Pradesh, Manipur, Mizoram and Nagaland] and upgradation/expansion of

SCADA/EMS in other three (3) states; establishment of OPGW based

communication link, construction of 400 kV P.K. Bari Surjamaninagar line asregional project. Further, he informed that IIT Guwahati has been requested to

assist the study group members of NERPC in various system studies associated

with NER network and state network. He also briefed about the recent orders

i d b CERC i l di th i i b CERC f i j ti f i fi t


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Minutes of 89thOCC meeting held on 13thSeptember, 2013 at Shillong

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

take up the agenda items for discussion.

CONFIRMATION OF MINUTES OF 88th MEETING OF OPERATION SUB-COMMITTEE OF NERPC.

S.E (O) informed that the minutes of 88th meeting of Operation Co-ordination Sub-

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

NERPC/SE (O)/OCC/2013/4696-4725 dated 16th August, 2013.

He informed that NERLDC vide letter No. NERLDC/GM/1278 dated 23.08.2013

wanted Item No. C.17 to be modified as below:

I t em No: C. 17 - M i n u t es r eco r d ed: DGM, POWERGRID informed that the all the

Energy Meters, which are in service, are less than 5 years old. He requested

NERLDC to list out the meters which are likely to complete 5 years of service so

that necessary action can be taken up by POWERGRID accordingly.

Minu t es t o be r eco r ded as : NERLDC does not maintain database on

procurement, installation dates of SEMs. Hence, testing schedule of SEMs is to be

drawn by CTU based on its record/database of procurement, installation

GM, POWERGRID informed that only few meters are more than 5 (five) years old

and stated that these meters will be tested, calibrated and replaced soon.

Th e Sub -comm i t t ee con f i r m ed t h e m i n u t es o f 88 t h OCCM o f NERPC as n o

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 AUG 13i) Average frequencyduring August, 2013 was 50.11 Hz as compared to 50.07 Hz

in July, 2013

ii) Minimum frequency in August, 2013 was 49.37 Hz as compared to 49.02 Hzrecorded in the previous month.

iii) Maximum frequencywas 50.64 Hz (11.08.13 at 06:09 hrs) as compared to 50.63Hz recorded in July, 2013.

iv) System frequencyremained within permissible range of 49.7 Hz to 50.2 Hz for75.46 % of the time, below 49.7 Hz for 1.08 % and above 50.2 Hz for 23.46 % of

the time as compared to 85.35 %, 0.15 % and 14.5 % respectively in the previous

month.

v) Regional peakdemand in August, 2013 was 2158 MW as compared to 1984 MWin July, 2013, an increase of 8.77 % over the previous month.

vi) Regional peak availability was 1920 MW as compared to 1973 MW in previousmonth, a decrease of 3 % over the previous month.

vii)Energy requirementwas 1156.76 MUs in August, 2013 compared to 1139.97MUs in July, 2013, an increase of 1.47 % over the previous month.

viii)Regional energy availabilitywas 1091.19 MUs compared to 1126.12 MUs in theprevious month, a decrease of 3% over the previous month.

ix) Rise in demand met was recorded in Manipur (1%), Assam (2%), Ar. Pradesh(7%), Meghalaya (1%), Mizoram (5%) & Nagaland (2%) over the previous month.

x) Drop in demand met was recorded in Tripura (5%) over the previous month viz.July, 2013.

xi) No Over Voltage at 400 kV Sub-Station wasobserved


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SN Parameter August, 2013 July, 2013

REGIONAL GENERATION & INTER REGIONAL EXCHANGES (in MU)

1 Total Generation in NER (Gross) 936.2 1024.25

2Total Central Sector Generation (Gross) 575.12 650.62

Total State Sector Generation (Gross) 361.08 373.63

3

Inter-Regional Energy Exchanges

(a) NER ER 13.41 30.56

(b) ER NER 187.8 146.56

(c) Net Import 174.39 116.0

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

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

State

A(


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Byrnihat Bongaigaon 400kV line January, 2014

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 progressMariani Mokokchung 220kV D/c line - works in progress

During the 14th TCC meeting, representative of OTPC informed that the Unit

tripped after re-synchronization due to rotor earth fault. However, the machine will

be resynchronized to the grid during middle of September, 2013. Regarding Unit#2,

he informed preliminary tests are in progress and the machine will be synchronized

by November 2013 for trail run. The declaration of CoD is expected by December

2013.

Del i b e r a t i o n o f t h e Comm i t t e e

OTPC representative informed that ONGC has carried out the cleaning of gas pipe

line and filters are to be changed, which will be completed by 15.09.2013. He stated

that after completion of work, OTPC will go for trial run again followed by integrated

DLN tuning and PPA test.

The committee enquired about the faulty gas compressor and the safety of the plant

to run with only single gas compressor.

GM, OTPC stated that the faulty gas compressor has already reached Hyderabad

and the status is not known how long it will take to rectify the compressor. He

requested all the constituents to help them in backing down their generation, if

required, during the trial run of the plant.

NEEPCO and NHPC stated that their reservoirs are full and sometimes spilling of

water is also taking place and hence backing down of their generations at this stage


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The Committee decided that since lean hydro season is approaching, OTPC can

avail the opportunity to complete trial run & PPA tests for declaration of CoD.

However, based on real time operation NERLDC will look into the matter to

accommodate the trial run operation of OTPC. NERLDC requested Generators &Constituents to co-operate for backing down of their generation, if required, for

accommodating Palatana generation for testing purposes and declaration of CoD.

The Committee also enquired about the low voltage of problem in the generating

station of NHPC at Loktak, which was raised during the 14thTCC meeting.

NHPC representative presented the voltage profile at the Loktak generating station

of NHPC, which was found to be within IEGC range. Further, he informed that

voltage profile has improved.

The Committee requested NHPC to send the relevant data to NERLDC viz. MVAR

generation, MW generation, position of GT tap and corresponding voltage profile

[particularly when voltage is less than 120kV] etc., so that NERLDC can study the

matter. NHPC agreed to submit the same.

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

C.2 Independent third party audit of protection system:The protection audit of the substations / generating stations in NER was completed

in February, 2013 and subsequently Detailed Project Report (DPR) was submitted to

CEA in June, 2013. The estimated cost projected in the DPR for rectification /renovations of substations / generating stations of seven states of the region is

about Rs. 816 crores. He also highlighted about the discussion in 2nd NPC meeting

held at Delhi on July 16, 2013 regarding funding from PSDF for renovation & up-

gradation of substations and generating station in NER During the meeting CEA


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During the 14th TCC meeting, the issue had been discussed in detailed. The

committee decided that the states should plan to take up renovation & up-gradation

of protection systems at the earliest without waiting for funding from PSDF. Since

constituents are not in a position to finalize the funding pattern, the committeerequested NERPC, on behalf of the region, to take up the matter with Ministry of

Power and DoNER for funding from Non-Lapsable Central Pool Resources (NLCPR)

Central.


SE (O) stated that consolidated project proposal for funding through NLCPR

(Central) are to be prepared for taking up renovation/rectification works. The

proposal is to be submitted on behalf of the region to MoP with copy to DoNER. The

upgradation/ renovations of substations / generating stations are essential for

safety, security and reliable operation of the system. Initiative should be taken for

taking up rectification work at the earliest without waiting for funding.


C.3 Details of Installations and self-certification (by STUs and CTUs) in respectof operationalisation of Under Frequency Relays (UFRs) in NER systems and

additional requirement of UFR and df/dt relays:

During 14th TCC meeting, the quantum of UFR based load shedding has been

approved by the Committee as decided in the 88 th& 13thPCC meeting as given

below:

SN Stages Frequency(in Hz)State-wise Load

SheddingTotal Load shedding

(in MW)

1 Stage-I 49.2

Arunachal = 5 MWAssam = 55 MW

Manipur = 5 MWMeghalaya = 15 MW 100


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3 Stage-III 48.8

Arunachal = 5 MWAssam = 55 MWManipur = 5 MWMeghalaya = 15 MWMizoram = 5 MW

Nagaland = 5 MWTripura = 10 MW

100

4 Stage-IV 48.6

Arunachal = 5 MWAssam = 55 MW

Manipur = 5 MWMeghalaya = 15 MW

Mizoram = 5 MWNagaland = 5 MW

Tripura = 10 MW

100

Total load shedding 400


The Sub-committee requested all constituents to identify and furnish the list of

feeders for above quantum of UFR based load shedding in their respective States

(Ar. Pradesh, Manipur, Mizoram & Nagaland 4 x 5 = 20 MW, Assam 4 x 55 =

220 MW, Meghalaya 4 x 15 = 60 MW and Tripura 4 x 10 = 40 MW) for all the

four (4) stages so that the same can be finalized in the next OCC/PCC meetings.

All constituents agreed to submit the list of feeders at the earliest.


C.4 Lines under long outagesThe status for restoration of these lines as informed in the 14thTCC meeting is as

follows:

a) 220kV BTPS Agia line (one ckt) [Since Nov97]: Material has already been


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

Ca s e 1 : When Pa l a t a n a u n i t t r i p s :

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

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 Badarpurof 132 kV Badarpur Panchgram line should be tripped.

iv. After these trippings an instant load of 80 MW will be relieved during off-peakhours & 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 : Wh en 40 0 k V Pa l a t an a -S i l c h er (D /C) l i nes t r i p

i. When both the ckts of 400 kV Palatana Silchar lines trips, a signal will begenerated 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 Badarpurend of 132 kV Badarpur Panchgram line should be tripped.

iv. After these trippings an instant load of 80 MW will be relieved during off-peakhours & 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 3 : 40 0 k V S i l c h a r By r n i h a t l i n e (w i t h gene r a t i o n a t Pa l l a t a n a )


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Mi t f 89th OCC ti h ld 13th S t b 2013 t Shill


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SPS will be reviewed from time to time after implementation for further

improvement based on the system requirement. The SPS will be reviewed again

when the second Unit at Palatana is connected to the NER grid.

During 14thTCC meeting, the committee requested OTPC to highlight action plan

for reducing the generation for implementation of proposed SPS. OTPC requested

NERLDC for providing certain information as desired by BHEL. Committee advised

OTPC to communicate NERLDC accordingly for getting the required information.

OTPC was requested for taking early action for implementation of SPS for safety &

security of the NER grid.


GM, NERTS informed that for SPS corresponding to Case I & IV will be madeoperational from 14.09.2013.

GM, NERLDC stated that the main concern is for SPS corresponding to Case II &

III above and requested OTPC to look into the matter for implementation at the

earliest.

GM (Plant), OTPC stated that such reduction of load at very short duration would

be difficult. However, he stated that no proposal has been received from BHEL.

However, BHELs representative will be requested to visit the site again and

discuss with NERLDC along with OTPC so that matter can be resolved at the

earliest. Subcommittee requested OTPC to resolve the issue at the earliest in

consultation with NERLDC & BHEL.


Minutes of 89th OCC meeting held on 13th September 2013 at Shillong


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SN Islanding Scheme Lines required to be openedUFR

LocationImplementing

Agency

1

ISLAND AT 48.80 Hz:Island comprising of

generating units ofAGBPP (Gas), NTPS(Gas) & LTPS (Gas) andloads of Upper Assamsystem & Deomali area(Ar. Pradesh)

[Total Generation:380-400MW and load:200MW (off peak)-

300MW (peak)]

(a) 220 kV New Mariani (PG) AGBPP

UFR-1[At NewMariani

(PG)]

POWERGRID(b)220 kV New Mariani (PG)

Misa

(c) 220 kV Mariani MisaUFR-2

[At Mariani,Samaguri ofAEGCL]

AEGCL(d)220 kV Mariani Samaguri(e) 132 kV Mokukchung Mariani(f) 132 kV Dimapur (PG)

Bokajan

UFR-3

[At Dimapur(PG)]

POWERGRID

2

ISLAND AT 48.20 Hz:Island comprising ofgenerating units ofAGTPP (Gas), generatingunits at Baramura(Gas), Rokhia (Gas) &

Gumati (Hydro) andloads of Tripura system& Dullavcherra area(Assam)

[Total Generation:150-160MW and load:110MW (off-peak)-150MW (peak)]

132 kV Palatana Udaipur UFR-1

[AtPalatana]

OTPC

132 kV Palatana Surjamani Nagar

132 kV Silchar DullavcherraUFR-2[At Silchar]

POWERGRID

132 kV AGTPP Kumarghat UFR-3[AtKumarghat]

POWERGRID132 kV P K Bari Kumarghat

3

ISLAND AT 47.90 Hz:Isolation of NER fromNEW grid at ER-NERboundary with rest ofthe generation and loadof NER

To be decided after system study

The islanding schemes 1 & 2 elaborated above have been agreed by TCC members

as decided in the 12th PCC meeting. GM (OS), POWERGRID suggested that while

finalizing the islanding scheme -1 (proposed at 48.8 Hz), 100MW of UFR based load

shedding proposed at 48.8Hz (as decided by NPC) should be taken into account and

adequate time delay should be provided for operation of UFR or df/dt relay.



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assistance. Necessary data will be furnished to Prof. Tripathy by NERLDC for

further action.


The Sub-committee decided to form a sub-group to look into the matter and discuss

in detail for implementation of the islanding scheme 1 &2.

The sub-group would comprise of representatives from Assam, Tripura, NEEPCO,

POWERGRID, NERPC, NERLDC & IIT, Guwahati. The nomination from various

organizations should reach NERPC before next OCC/PCC meeting so that further

action plan can be discussed in next OCC/PCC meeting.


C.7 Grid Security Expert System (GSES):SE (O), NERPC informed that during the 14th TCC meeting, the committee decided

to review again about the implementation of GSES after setting of SLDCs in all

states and establishment reliable communication link.

The i s sue i s k ep t i n a beyan ce f o r t h e t im e bei n g .


C.8 Release of day ahead drawal schedule based on actual requisition byConstituents instead of open and full capacity requisition:

In the 14th TCC meeting, GM, NERDC informed that requisition based scheduling

has been implemented on 27.08.2013 on 15 minutes time block (96 blocks in a day)

and so far no difficulties have been encountered



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Minutes of 89 OCC meeting held on 13 September, 2013 at Shillong


DGM, TSECL stated that requisition based scheduling has been implemented from

27th August, 2013; but sometimes as per their requisition the schedule was not

implemented.

DGM, NERLDC stated that during 88thOCC meeting all constituents had agreed for

full support and co-operation during the initial stage of implementation of

requisition based scheduling and the sub-committee had requested the constituent

states to bear with the problems likely to be encountered during initial phases and

co-operate with NERLDC for successful implementation. NERLDC also informed

that the technical minimum quantum declared by the generators will be followed by

them for scheduling purposes as it is difficult to cross check the figures furnished

by generators along with DC.

NERLDC requested Tripura to furnish the details of the communications sent to

NERLDC for revision of schedule so that the reason for not entertaining such

revision can be ascertained.

Sr. Manager, NEEPCO stated that MoP/CEA have set the annual generation target

and they have to achieve the target strictly and at the same time, ifmost of the

constituents are in under drawal mode, it will be very difficult not only to meet the

target but also will lead to financial loss to them.

DGM, TSECL again stated that revision of scheduling is not intimated by NERLDC

and requested NERLDC to intimate them whenever revision takes place. NERLDC

informed that all the revisions are posted in their web site as soon as it is done.

The Sub-committee enquired from other constituents if they have faced any

difficulty so far. All other constituents informed that no difficulty has been

encountered so far and agreed for providing all support to NERLDC. The Sub-


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f g p , g

transformer can only operate at Principal tap and there is no back up O/C+E/F

protection on 220kV side of transformer. However, all efforts are to be taken to

complete the work by July, 2013. The sub-committee had suggested that all

required protection should be in place before operation of the transformer.

During 88th OCC meeting and 12th PCC meeting, Sr. Manager, NEEPCO informed

that Kopili HEP is facing serious problem due to acidic nature of water and most of

the engineers are busy with restoration of the plant. However, all efforts will be put

by NEEPCO to complete all required tests at the earliest before bringing the

transformers into operation and parallel operation of above transformer is likely to

be completed by August, 2013.The relay co-ordination will be done in consultation

with PGCIL.


Sr. Manager, NEEPCO informed that the transformer was in charged condition

since 08.09.2012 and while attempt was made to load the transformer on

13.08.2013, the transformer got tripped. On inspection, it was found that the tap

changer vent of phase-B Transformer has exploded. Once the repair work is over,

further action will be initiated and status will be intimated to the forum in next

OCC meeting.


C.12 Poor Availability of Auxiliary Supply at various Sub-stations of POWERGRIDin NER:

In line with the MOM of 87th OCC Meeting the issue has been taken up with

concerned utilities to look into the matter and improve the availability & reliability

of existing source from which auxiliary power supply is provided to following Sub



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f g p g

3 Kumarghat SS 80% AGM (CS & O), TSECL

4 Misa SS 20% The CGM (D), CAR

5 Balipara SS 75% The CGM (D), CAR

6 Badarpur SS 60% The CGM (D), LAR

CGM, LDC, AEGCL enquired from POWERGRID about the percentage mentioned

above, whether it is only the availability or the reliability also. Further, he requested

POWERGRID to intimate the quantum of auxiliary load requirement at each

substation mentioned above.

DGM, POWERGRID informed that both availability & reliability is necessary for

smooth operation of the grid. Regarding the quantum of load, he stated that there is

no change in requirement of auxiliary load in the above stations, however, the same

will be submitted to AEGCL.

CGM, LDC requested POWERGRID to keep in touch with the concerned person of

above substation and inform them about the non-availability of power supply as

and when it occurs and AEGCL will also pursue the matter for improvement in

availability of reliable auxiliary supply, which is required for the benefit of the grid.


GM, NERTS informed that the status is still the same, no further improvement till

date.

The Sub-committee requested POWERGRID to pursue with concerned constituents

so that the work could be completed at the earliest for the benefit of the grid.


i i f d f ili l i b i f



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SN S t a t i o nC ommun i c a t i o n

MadeS t a t u s / A ct i o n Pl a n

1 Bongaigaon CGM (D), LARApplied for a second source to DGM, APDCL,Kokrajhar. Response is being awaited tillnow.

APDCL m ay p l ease exp ed i t e2 Salakati CGM (D), LAR

3 KumarghatAGM (CS & O),

TSECL

Already has a 33 kV Connection apart fromthe existing 11 kV connection in use. The

33/0.4 kV Transformer is to becommissioned.

No issue

4 Misa CGM (D), CARApplied to SDO, Kathiatoli, for a secondsource. APDCL is to give estimate.

APDCL m ay p l ease exp ed i t e

SN S t a t i o nC ommun i c a t i o n

MadeS t a t u s / A ct i o n Pl a n

5 Balipara CGM (D), CAR

Applied to SDO, Balipara for a second source.

DGM PDCL, Tezpur confirmed that a 33 kVLine can be extended from Ghoramari S/S.Survey is to be conducted and estimate to beprepared.

APDCL m ay p lease exp ed i t e

6 Badarpur CGM (D), LAR

Applied to DGM, APDCL, Panchgram for asecond 33 kV connection, who has confirmedits feasibility but yet to submit cost estimateto POWERGRID.

APDCL m ay p lease exp ed i t e

7 DimapurThe Addl. Chief

Engineer,DoP, NL

Applied to Ex. Engr, Dimapur who hasconfirmed verbally that there is no provision

for a second source.I s sue ma y be d i scussed

8 Haflong CGM (D), LAR

Applied to AGM, APDCL, Haflong who hasconfirmed that there is no provision for a new33 kV connection. However he has confirmed

that a 33 kV connection is possible from the132/33 kV Haflong Grid Substation and

requested to take up the matter with AGM,AEGCL, Silchar.

AEGCL m ay p lease comm en t

Chi f E iTaken up with P&E Deptt. and it is confirmed

h d 11 kV i i ibl



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CGM, LDC requested POWERGRID to keep in touch with the concerned person of

above substation and inform them about the non-availability of power supply as

and when it occurs and AEGCL will also pursue the matter for improvement in

availability of reliable auxiliary supply, which is required for the benefit of the grid.

DGM, TSECL informed that their proposal has already been communicated and

requested POWERGRID to take up the matter with concerned authority so that the

work can be completed at the earliest. EE, SLDC, Ar. Pradesh also agreed with the

proposal of Tripura. He also requested POWERGRID to take up the matter with

concerned authority of DoP, Ar. Pradesh for early necessary action.

Since no representatives from Mizoram & Nagaland were present in the meeting,

the Sub-committee requested POWERGRID to take up the issue directly with them.


Same status as item C.12 above.


C.14 Long outage of Transformers at BTPS:During the 86th OCC meeting, Assam had informed that one transformer (160

MVA, 220/132 KV) & one 80 MVA, 220/132 KV transformer at BTPS was under

shutdown


CGM, LDC, AEGCL informed that outage of the transformer was so long because

the (1x160MVA, 220/132kV) transformer failed during the warranty period and it

was dispatched to the factory of M/s EMCO. He informed that repaired

f i lik l h h i d i i i f h



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C.15 Monthly MU requirement & availability of each state of NER as per format:Requirement

Name of State Jun13 Jul13 Aug13 Sep13 Oct13

ArunachalPradesh

Assam

Manipur

Meghalaya

Mizoram

Nagaland

Tripura

AvailabilityName of State Jun13 Jul13 Aug13 Sep13 Oct13

ArunachalPradesh

Assam

Manipur

Meghalaya

Mizoram

Nagaland

Tripura

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

During the 87th OCC meeting all constituents have agreed to furnish the data as

per format above, but till date no constituents have submitted the data.


DGM, NERLDC informed that the above data have not been received by them, he

once again requested all the constituents to submit the same at the earliest.

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



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D. N E W I T E M S

D.1 Proforma for Operational StatisticsThe 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, drawalschedules and entitlements of constituents.

(v) Details of major reservoirs in NER.

Th e oper a t i o n a l s t a t i c s wer e shown i n t h e p r e sen t a t i o n b y NERLDC.


D.2 State-wise anticipated peak demand/requirement, shortage for September-December, 2013 & January, 2014.

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 eq u i r emen t / Av a i l a b i l i t y (w i t h o u t Pa l l a t a n a g en e r a t i o n ) f o r

t h e mon t h s o f Sep t ember t o D ec ember , 2 0 1 3 & J a n u a r y , 2 0 1 4 .

A. Peak Demand

SN. State

Peak

Demand

(MW)

Sep 13

Peak

Demand

(MW)

Oct 13

Peak

Demand

(MW)

Nov 13

Peak

Demand

(MW)

Dec 13

Peak

Demand

(MW)

Jan 14

1 Ar. Pradesh 130 130 130 130 120

2 Assam 1300 1350 1350 1350 1300


24/40



25/40


Sr. Manager, NEEPCO informed that the expert of Mitsubishi Corporation (MC)

Inspection Technical Advisor (TA) could not reach site due to VISA problem and the

scheduled program of Inspection got delayed. The unit is expected to be ready by

September 2013.

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

Shutdown of Complete Plant for 7(seven) days: For Revamp, Renovation &

Modernization works of Gas Booster Station of AGBPP following works in the

common area are to be attended:

A. Final gas line piping connection works (to be carried out by CEIPL):

(a) Installation of Station inlet scrubber,

(b) Installation of common engine fuel filter system

(c) Installation of all gas flow meters.

B. Works to be carried out by Dresser Rand

(a)Common discharge header modification,(b) Installation of 4nos of isolation valves in each individual unit with spectacle

blind and spool piece.

(c)Radiography/ hydro test, painting etc. for modified lines.

As such, shutdown of the complete Power Plant is required for seven days w.e.f.23rd Oct to 30th 2013. At present, contribution to the Grid from the Plant is 180

MW depending on the ambient temperature. The actual date of shutdown may vary

by a day or two depending on the arrival of man and materials at Site.



26/40

D.4 Puja load in TripuraTripura have to receive about 150 MW power during Durga Puja w.e.f 10.10.13 to

19.10.13 from the Grid. That time own generation from Tripura may be 100MW.

Demand has gradually increased since last April 2013. Necessary action for

arranging additional power is being taken up. Open access for bi-lateral transaction

may be 30 MW power from Me.ECL, 60MW from NVVN and 25 MW power from

Mizoram. NERLDC may ensure necessary arrangement to meet 270 MW power

during Puja by Tripura especially during 16.00 hrs to 24:00 hrs.


DGM, NERLDC stated that purchase of power from Me.ECL may not be helpful to

Tripura due to transmission constraints in 132 kV pocket. As per the study carried

out by NERLDC, Tripura can draw only 100 MW during peak hours of PUJA days.

He stated that the quantum of power purchased by Tripura from Mizoram will be

added up to their drawal quantum and so they should pursue with Mizoram to get

maximum power from them. He also requested Tripura to adhere to their drawal

quantum by avoiding over drawal for the safety and security of the grid.

The Sub-committee requested Tripura to pursue with Mizoram and the status will

be reviewed again in the next OCC meeting before the Puja festival.

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

D.5 Outage Planning Transmission elementsAfter detail discussion the sub-committee approved the shutdown as proposed by

POWERGRID, ENCIL and AEGCL September/October, 2013 is given in Annexure



27/40

transmission elements for the month of October & November 2013 for discussion in

90thOCC meeting to be held in 1stweek of October, 2013. The Sub-committee has

also requested to all the agencies that shutdown period and timing granted in the

OCC meeting should be strictly adhered to avoid difficulties in the operation of grid.

Further, the Sub-committee have decided that in case of daytime shutdown, the

transmission elements should be brought back into service as per approved shut

down programme and the line should be charged by 16:00 Hrs sharp. No planned

shutdown, other than those approved in OCC meeting, of transmission

elements and generating unit will be entertained anymore unless it is of

emergency nature. In this regard, NERPC has already communicated number

of times. The subcommittee has decided to follow the planned shutdown

programme as approved in OCC forum strictly and requested all constituents

of the region to co-operate.


D.6 Estimated Transmission Availability Certificate (TAC) for the month of July,2013.

The Estimated Transmission System Availability for the month of July, 2013,

furnished by PGCIL, is 99.9604%. The detail outage data for calculation ofTransmission System Availability furnished by PGCIL, is at Annexure D.17. NER

constituents are requested to kindly communicate their views and observations, if

any, by 27th September, 2013 so that Final TAC for the month of August, 2013

may be finalized by NERPC Secretariat.


D.7 Major grid disturbances in the previous month (August, 2013 )



28/40

D.8 Any other item:

D.9 Date & Venue of next OCC meeting

It is proposed to hold the 90th OCC meeting of NERPC on first week of October,

2013. As per roaster, Mizoram will be the host for 90th OCC meeting. The exact

venue will be intimated in due course.

The meeting ended with thanks to the Chair.

*************



29/40

Annexure-I

List of Participants in the 89thOCC meeting held on 13/09/2013

SN Name & Designation Organization Contact No.

1. No Representatives Ar. Pradesh

2. Sh. H.C. Phukan, 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, SLDC Assam 09864116176

7. Sh. K. Goswami, AGM, Com-T Assam 09864020019

8. Sh. G.K. Bhuyan, AGM, (Protection) Assam 09954055295

9. Sh. Budha Chandra Sharma, EE Manipur 09436020911

10. Sh. A. Kharpan, SE, Me. PTCL Meghalaya 09436117802

11 Sh. R. Syiem, SE, Me. PTCL Meghalaya 09863065704

12. Sh. M. Marbaniang, SE, (T&T) Meghalaya 09436110759

13. Sh. F.E. Kharshiing, SE, SLDC Meghalaya 09863063375

14. No Representatives Mizoram

15. Sh. Nitovi Wotsa, EE (E) Nagaland 09436004928

16. Sh. A. Jakhalu, EE (Trans) Nagaland 09436002696

17. Sh. A. Gan. Chaudhuri, DGM (C&T) Tripura 09436139311

18. Sh. B. Debbarma, DGM (SO) Tripura 09436450501

19. Sh. T. S. Singh, GM NERLDC 09436302717

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

21. Sh. A. Mallick, CM (SO-II) NERLDC 09436302720

22. Sh. B.R Medhi, Dy. Manager NERLDC 09436335379

23. Sh. Rahul Chakrabarti, Engineer NERLDC 09402507543

24. Sh. A. Patir, GM NERTS 09436302529

25. Sh. Madhavan, Manager NERTS 09436335250

26. Sh. P.C. Barman, DGM NEEPCO 09435144141

27. Sh. D. Choudhury, Sr. Mgr NEEPCO 09435339747

28. Sh. Bhaskar Goswami, Sr. Mgr. NEEPCO 09436163983


30/40


31/40

Duration of Outage and Attributable ToName of the Element Ckt NoReason of OutageCategoryd/ lh


32/40

OutageSl.

No.

RestorationReason of OutageCategory

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

Sub-Total 00 00 00 00 00 00: : : 40 21:

Grand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand Total 00 00 0000 00: :: 00 111 : 22

Page 2 of 2

POWER GRID CORPORATION OF INDIA LIMITED


33/40

Exception Report

OPERATION SERVICE DEPARTMENT, NERTS, SHILLONG

MONTH : AUGUST-13

OutageSl.No.

RestorationDuration of Outage and Attributable To

Name of the Element Ckt No

Reason of OutageCategory

Hrs. Mns.

Outage undercategories of

Deemed Available

Hrs. Mns.

Sys.Const/Naturalcalamities/

Miltant activities

Hrs. Mns.

OtherConstituents

Hrs. Mns.

POWERGRID

Date Time Date Time

BADARPUR_KOLASIB

1 00 00 00 00 00 18 LNCC: : :03/08/2013 21:10 03/08/2013 21:28tripped during heavy lightning00 00:

Sub-Total 00 00 00 00 00 18: : : 00 00:

AIZWAL_KUMARGHAT

2 01 32 00 00 00 00 OMST: : :17/08/2013 10:15 17/08/2013 11:47SD of main bus at Aizawl for Isolator

rectification works00 00:

3 00 00 00 00 00 07 LNCC: : :17/08/2013 16:29 17/08/2013 16:36A bamboo bush fell upon line due to

landslide loc.85-8600 00:

4 00 05 00 00 00 00 LEFT: : :25/08/2013 21:55 25/08/2013 22:00Transient E/F00 00:

Sub-Total 01 37 00 00 00 07: : : 00 00:

AIZWAL_ZEMEBAK # 2

5 00 00 00 00 00 00 OSFD: : :07/08/2013 15:40 07/08/2013 17:08ESD taken by Zemabawk, Mizoram01 28:



Sub-Total 01 29 00 00 00 00: : : 01 28:

BADARPUR-BADARPUR

7 00 00 00 00 00 00 OSFD: : :05/08/2013 18:43 05/08/2013 20:43ESD of Main Bus taken by AEGCL02 00:

Sub-Total 00 00 00 00 00 00: : : 02 00:

BADARPUR_JIRIBAM

8 00 0000 29

00 00

OMSU: : :27/08/2013 19:00 27/08/2013 19:29

SD of Main Bus taken for attending

dama ed dro er connectin ICT state00 00:

Sub-Total 00 00 00 29 00 00: : : 00 00:

BADARPUR_KHLIERIAT

9 00 00 00 00 00 02 LNCC: : :03/08/2013 17:32 03/08/2013 17:34Tripped during heavy lightning00 00:

Sub-Total 00 00 00 00 00 02: : : 00 00:

BADARPUR_KUMARGHAT

10 00 00 00 00 00 07 LNCC: : :24/08/2013 00:52 24/08/2013 00:59Line section patrolled, no abnormality00 00:

Sub-Total00 00 00 00

0007

: : : 00 00:

DIMAPUR_IMPHAL

Page 1 of 8

Duration of Outage and Attributable ToName of the Element Ckt NoReason of OutageC t


34/40

OutageSl.No.


Hrs. Mns.


Deemed Available

Hrs. Mns.


Miltant activities

Hrs. Mns.

OtherConstituents

Hrs. Mns.

POWERGRID

Date Time Date Time

11 00 00 00 00 00 00

SCSD: ::08/08/2013 08:15 08/08/2013 17:09

SD taken for upgradation of existing CTs

with CTs of hi her ratio 600/108 54:

12 00 00 00 10 00 00 OMSU: : :15/08/2013 13:14 15/08/2013 13:24disturbance in Manipur state system00 00:


14 00 29 00 00 00 00 OMST: : :26/08/2013 03:37 26/08/2013 04:06LBB operation in 132KV side00 00:

15 00 00 00 00 00 00 SCSD: : :31/08/2013 05:12 31/08/2013 08:30Main Bus SD at Imphal for facilitating bay

extn work03 18:

Sub-Total 00 38 00 10 00 00: : : 12 12:

DOYANG_DIMAPUR # 1

16 00 00 00 00 00 16 LNCC: : :11/08/2013 15:21 11/08/2013 15:37Tripped on direct lightning stroke00 00:

17 00 00 00 00 08 56 LNCC: : :26/08/2013 03:14 26/08/2013 12:10Rph Insulator decapped at loc. 188 dur to00 00:

18 02 38 00 00 00 00 OMST: : :29/08/2013 12:41 29/08/2013 15:19SD taken for checking/testing of DPR &

other schemes00 00:

Sub-Total 02 38 00 00 09 12: : : 00 00:

DOYANG_DIMAPUR # 2

19 00 00 00 00 00 20 LNCC: : :11/08/2013 15:21 11/08/2013 15:41Tripped on direct lightning stroke00 00:

20 00 00 00 00 04 46 LMAC: : :19/08/2013 07:33 19/08/2013 12:19 A tree from uphill side felled by villagers inthe s an 227-2800 00:

21 00 00 00 00 00 18 LMAC: : :19/08/2013 12:40 19/08/2013 12:58tree from uphill sidse felled by villagers00 00:

22 00 39 00 00 00 00 OMST: : :26/08/2013 03:37 26/08/2013 04:16LBB operation in 132KV side00 00:

Sub-Total 00 39 00 00 05 24: : : 00 00:

IMPHAL_IMPHAL

23 00 00 00 00 00 20 GGDC: : :13/08/2013 16:02 13/08/2013 16:22Tripped on protn against fault in

downstream Mani ur s stem00 00:

24 00 00 00 13 00 00OMSU

: : :15/08/2013 11:02 15/08/2013 11:15

Tripped on fault in state downstream line

00 00:

25 00 00 00 25 00 00 OMSU: : :22/08/2013 17:34 22/08/2013 17:59Fault in state downstream fault00 00:

26 00 00 00 12 00 00 OMSU: : :22/08/2013 20:03 22/08/2013 20:15Dfault in state downstream system00 00:

27 00 00 00 25 00 00 OMSU: : :23/08/2013 14:30 23/08/2013 14:55Downstream fault in state system00 00:

28 00 00 00 08 00 00 OMSU: : :23/08/2013 16:40 23/08/2013 16:48do00 00:

29 00 00 00 14 00 00 OMSU: : :23/08/2013 19:40 23/08/2013 19:54do00 00:

30 00 00 00 14 00 00 OMSU: : :26/08/2013 12:18 26/08/2013 12:32 Fault in downstream state line00 00:

Page 2 of 8

Duration of Outage and Attributable ToName of the Element Ckt NoReason of OutageC t g


35/40

OutageSl.No.


Hrs. Mns.


Deemed Available

Hrs. Mns.


Miltant activities

Hrs. Mns.

OtherConstituents

Hrs. Mns.

POWERGRID

Date Time Date Time

31 00 0000 00

00 00

SCSD: : :31/08/2013 05:08 31/08/2013 08:42

Main Bus SD at Imphal for facilitating bay

extn work03 34:

Sub-Total 00 00 01 51 00 20: : : 03 34:

JIRIBAM_AIZWAL


33 00 00 00 00 00 08 LNCC: : :23/08/2013 12:47 23/08/2013 12:55Tripped due to falling of bamboo from00 00:

34 00 00 00 00 00 08 LNCC: : :23/08/2013 20:23 23/08/2013 20:31tripped during lightning with LA counter

incr. at AZL end00 00:

35 00 00 00 00 00 17 LNCC: : :23/08/2013 20:34 23/08/2013 20:51lightning, LA counter incr at AZL end00 00:

36 00 00 00 00 00 19 LNCC: : :23/08/2013 20:57 23/08/2013 21:16do00 00:

37 00 08 00 00 00 00 LPPT: : :27/08/2013 12:46 27/08/2013 12:54Phase to Phase fault00 00:

38 00 00 00 38 00 00 OMSU: : :27/08/2013 18:58 27/08/2013 19:36SD of Main Bus taken for attending


Sub-Total 00 15 00 38 00 52: : : 00 00:

JIRIBAM_HAFLONG


40 00 00 00 00 00 21 LNCC: : :26/08/2013 01:22 26/08/2013 01:43 Insulator flashover at loc.254,255 & 257 dueto li htnin LA counter incr. at JBM end00 00:

41 00 00 00 37 00 00 OMSU: : :27/08/2013 18:57 27/08/2013 19:34SD of Main Bus taken for attending


42 00 00 00 00 01 18 LNCC: : :29/08/2013 10:29 29/08/2013 11:47SD taken for replacement of Insulator strings

at loc.257 dama ed due to li htnin00 00:

Sub-Total 00 11 00 37 01 39: : : 00 00:

JIRIBAM_LOKTAK # 2

43 00 00 00 00 00 06 LNCC: : :04/08/2013 00:55 04/08/2013 01:01tripped during heavy lightning00 00:

44 00 00 00 00 00 05GGDC

: : :09/08/2013 08:17 09/08/2013 08:22

Tripped on overcurrent protn

00 00:

45 00 00 00 00 00 10 GGDC: : :13/08/2013 16:02 13/08/2013 16:12Tripped due to problem in Manipur grid00 00:

46 00 00 00 00 00 14 GGDC: : :15/08/2013 14:36 15/08/2013 14:50Due to overloading subsequent to

disturbance in Mani ur s stem00 00:

47 00 10 00 00 00 00 LPPT: : :17/08/2013 09:38 17/08/2013 09:48Phase to Phase fault00 00:

48 00 00 00 00 00 04 GGDC: : :17/08/2013 11:11 17/08/2013 11:15Tripped due to overloading00 00:

49 00 00 00 08 00 00 OMSU: : :27/08/2013 13:39 27/08/2013 13:47Tripped due to fault in Jiribam-Poilapool line00 00:

50 00 00 00 42 00 00 OMSU: : :27/08/2013 18:55 27/08/2013 19:37 SD of Main Bus taken for attendingdama ed dro er connectin ICT state00 00:

Page 3 of 8


36/40

Duration of Outage and Attributable ToName of the Element Ckt NoReason of OutageCategoryO tage nderS s Const/Nat ralOtherPOWERGRID


37/40

OutageSl.No.

RestorationgCategory

Hrs. Mns.


Deemed Available

Hrs. Mns.


Miltant activities

Hrs. Mns.

OtherConstituents

Hrs. Mns.

POWERGRID

Date Time Date Time

68 00 00 00 00 00 00 SCSD: : :22/08/2013 08:0422/08/2013 16:50

do08 46:

69 00 00 00 00 00 00 GOMD: : :22/08/2013 16:50 23/08/2013 14:55kept open as per instruction of NERLDC22 05:

Sub-Total 00 00 00 00 00 00: : : 49 51:

KUMARGHAT_R C NAGAR


71 00 00 00 00 00 00 LCSD: : :25/08/2013 08:01 25/08/2013 18:27SD taken for facilitating stringing of Silchar-

Pkbari line10 26:

Sub-Total 00 06 00 00 00 00: : : 10 26:

LOKTAK_IMPHAL # 2

72 00 00 00 00 00 00 LCSD: : :09/08/2013 08:17 09/08/2013 16:23SD taken for replacement/tightening of

existin um ers in the line08 06:

73 00 00 00 00 00 00 LCSD: : :10/08/2013 08:25 10/08/2013 16:33do08 08:

74 00 00 00 00 00 05 GGDC: : :13/08/2013 16:02 13/08/2013 16:07Tripped due to problem in Manipur grid00 00:

75 00 00 00 14 00 00 OMSU: : :15/08/2013 13:14 15/08/2013 13:28Disturbance in Manipur state downstream

s stem00 00:

76 00 00 00 14 00 00 OMSU: : :15/08/2013 14:36 15/08/2013 14:50Due to disturbance in state downstream fault00 00:

77 00 00 00 00 00 06 LNCC: : :17/08/2013 11:11 17/08/2013 11:17 Rph Insulator at loc.12 damaged due toli htnin00 00:

78 00 00 00 00 03 52 LNCC: : :19/08/2013 12:00 19/08/2013 15:52Rph Insulator string at loc.12 damaged due

to li htnin00 00:

79 00 00 00 00 00 00 SCSD: : :31/08/2013 05:14 31/08/2013 08:32Main Bus SD at Imphal for facilitating bay

extn work03 18:

Sub-Total 00 00 00 28 04 03: : : 19 32:

NIRJULI-RANGANADI

80 00 00 00 24 00 00 OMSU: : :05/08/2013 06:11 05/08/2013 06:35Tripped on fault beond line jurisdiction00 00:

Sub-Total 00 00 00 24 00 00: : : 00 00:

KOLASIB-AIZAWL




83 10 36 00 00 00 00 OSPT: : :25/08/2013 11:50 25/08/2013 22:26SD taken for bay maintenance work at

Kolasib end00 00:


Sub-Total 12 25 00 00 00 00: : : 00 00:

RANGANADI-ZIRO

Page 5 of 8

Duration of Outage and Attributable ToName of the Element Ckt NoReason of OutageCategoryOutage underSys Const/NaturalOtherPOWERGRID


38/40

OutageSl.No.

RestorationgCategory

Hrs. Mns.


Deemed Available

Hrs. Mns.


Miltant activities

Hrs. Mns.

OtherConstituents

Hrs. Mns.

POWERGRID

Date Time Date Time

85 00 00 00 24 00 00 OMSU: : :04/08/2013 12:5604/08/2013 13:20

Tripped due to downstream fault in state

line Ziro-Da orizo00 00:

Sub-Total 00 00 00 24 00 00: : : 00 00:

KHANDONG_KOPILI # 2

86 00 00 00 00 00 03 GGDC: : :02/08/2013 13:17 02/08/2013 13:20tripped on overloading00 00:

87 00 00 00 00 00 12 GGDC: : :03/08/2013 16:56 03/08/2013 17:08tripped on overcurrent protn00 00:

88 00 00 00 00 00 05 GGDC: : :03/08/2013 17:32 03/08/2013 17:37do00 00:

Sub-Total 00 00 00 00 00 20: : : 00 00:

SILCHAR-SRIKONA-I #1

89 07 51 00 00 00 00 OSPT: : :09/08/2013 08:54 09/08/2013 16:45AMP S/D00 00:

Sub-Total 07 51 00 00 00 00: : : 00 00:

SILCHAR-SRIKONA-II #2

90 08 13 00 00 00 00 OSPT: : :10/08/2013 08:49 10/08/2013 17:02AMP S/D00 00:

Sub-Total 08 13 00 00 00 00: : : 00 00:

BALIPARA_TEZPUR

91 00 00 00 00 00 00 OSFD: : :01/08/2013 13:02 01/08/2013 18:20 Bus-SD availed by AEGCL05 18:

92 00 00 01 09 00 00 OMSU: : :02/08/2013 06:34 02/08/2013 07:43fault beyond POWERGRID line jurisdiction00 00:

93 00 00 01 09 00 00 OMSU: : :10/08/2013 10:41 10/08/2013 11:50Fault beyond POWERGRID jurisdiction00 00:

Sub-Total 00 00 02 18 00 00: : : 05 18:

KATHALGURI_MARIANI

94 00 00 00 00 00 00 OSFD: : :06/08/2013 10:40 06/08/2013 15:14ESD taken by AEGCL for Isolator


95 00 00 01 36 00 00OMSU: :

:10/08/2013 12:01 10/08/2013 13:37

SD taken by Kathalguri(NEEPCO)00 00:

Sub-Total 00 00 01 36 00 00: : : 04 34:

MISA_DIMAPUR # 1

96 07 48 00 00 00 00 OSPT: : :24/08/2013 08:52 24/08/2013 16:40SD taken for tightening of jumpers along the

line00 00:

Sub-Total 07 48 00 00 00 00: : : 00 00:

MISA_DIMAPUR # 2

97 08 20 00 00 00 00 OSPT: : :25/08/2013 08:29 25/08/2013 16:49SD taken for tightening of jumpers along the

line00 00:

Sub-Total 08 20 00 00 00 00: : : 00 00:MISA_KATHALGURI

Page 6 of 8

Duration of Outage and Attributable ToName of the Element Ckt NoReason of OutageCategoryOutage underSys.Const/NaturalOtherPOWERGRID


39/40

OutageSl.No.

Restorationg y

Hrs. Mns.


Deemed Available

Hrs. Mns.


Miltant activities

Hrs. Mns.

OtherConstituents

Hrs. Mns.

POWERGRID

Date Time Date Time

98 00 00 04 05 00 00 OMSU: : :12/08/2013 11:0912/08/2013 15:14

SD by NEEPCO00 00:

Sub-Total 00 00 04 05 00 00: : : 00 00:

MISA_MARIANI

99 00 00 00 00 00 00 OSFD: : :06/08/2013 10:29 06/08/2013 16:30SD taken by AEGCL for rectification of

Isolator06 01:

100 00 00 00 00 01 01 LNCC: : :26/08/2013 03:54 26/08/2013 04:55Tripped due to lightning, delay in charging00 00:

Sub-Total 00 00 00 00 01 01: : : 06 01:

MISA_SAMAGURI # 1

101 00 00 00 00 00 00OSFD

: : :01/08/2013 13:02 01/08/2013 17:49Bus SD availed by AEGCL

04 47:

102 00 00 00 00 00 19 LNCC: : :02/08/2013 01:27 02/08/2013 01:46No abnormality found during patrolling,

li htnin sus ected00 00:

Sub-Total 00 00 00 00 00 19: : : 04 47:

MISA_SAMAGURI # 2

103 00 00 00 00 00 00 OSFD: : :01/08/2013 13:02 01/08/2013 17:51Bus-SD availed by AEGCL04 49:

Sub-Total 00 00 00 00 00 00: : : 04 49:

BALIPARA_BONGAIGAON # 1

104 00 00 00 00 09 46 LNCC: : :29/08/2013 08:05 29/08/2013 17:51 SD taken in connection with shifting ofloc.288 affected b erosion on Pile Fdn00 00:

105 00 00 00 00 08 04 LNCC: : :30/08/2013 08:26 30/08/2013 16:30do00 00:

Sub-Total 00 00 00 00 17 50: : : 00 00:

BALIPARA_BONGAIGAON # 2

106 03 04 00 00 00 00 SRMT: : :13/08/2013 20:25 13/08/2013 23:29Relay maloperation at Balipara end00 00:

107 00 00 00 00 00 17 LNCC: : :25/08/2013 19:57 25/08/2013 20:14Bph Insulator at loc.767 damaged due to

severe li htnin stroke00 00:

108 00 00 00 00 00 24

LNCC: ::27/08/2013 09:08 27/08/2013 09:32

transient tripping on account of lightning.00 00:

Sub-Total 03 04 00 00 00 41: : : 00 00:

MISA_BALIPARA # 1

109 00 00 00 00 00 00 SCSD: : :22/08/2013 08:38 22/08/2013 16:32Installtion of REL670 DPR at Balipara S/s07 54:

Sub-Total 00 00 00 00 00 00: : : 07 54:

MISA-BALIPARA #2

110 00 09 00 00 00 00 OMST: : :22/08/2013 09:09 22/08/2013 09:18line tripped during testing of Misa-Balipara-

I at Misa end00 00:

111 00 00 00 00 00 00 SCSD: : :23/08/2013 08:32 23/08/2013 16:20 SD taken for installation of REL670 DPR atBali ara end07 48:

Page 7 of 8

O t R t ti

Duration of Outage and Attributable ToName of the Element Ckt NoReason of OutageCategoryOutage underSys.Const/NaturalOtherPOWERGRID


40/40

OutageSl.No.

Restoration

Hrs. Mns.

gcategories of

Deemed Available

Hrs. Mns.

y /calamities/

Miltant activities

Hrs. Mns.

Constituents

Hrs. Mns.Date Time Date Time

Sub-Total 00 09 00 00 00 00: : : 07 48:

BALIPARA-RANGANADI # 1

112 00 00 00 00 00 00 LVRD: : :01/08/2013 00:00 01/08/2013 19:02H/T for vol. regu. On RLDC instruction vide

code 426019 02:

113 00 00 00 00 00 00 LVRD: : :02/08/2013 00:50 02/08/2013 08:20h/T for vol. regu. On RLDC instruction vide

code 427707 30:

114 00 00 00 00 299 35 LNCC: : :02/08/2013 08:20 14/08/2013 19:55SD for shifting of condr from ERS to new00 00:


code 437908 46:

116 00 00 00 00 10 52 LNCC: : :16/08/2013 08:35 16/08/2013 19:27SD taken for shifting of condr from ERS to

new tower on Pile fdn00 00:


code 437907 08:

118 00 00 00 00 06 18 LNCC: : :17/08/2013 06:44 17/08/2013 13:02SD taken for shifting of condr from ERS to00 00:


code 443118 46:


code 444616 57:

121 00 00 00 00 00 00 LVRD: : :25/08/2013 03:07 25/08/2013 16:47h/T for vol. regu. On RLDC instruction vide13 40:

Sub-Total 00 00 00 00 316 45: : : 91 49:

BALIPARA-RANGANADI # 2



code 437517 09:

124 00 00 00 00 58 49 LNCC: : :18/08/2013 08:07 20/08/2013 18:56SD taken fro shifting of condr from ERS to

new tower on Pile fdn00 00:

125 00 00 00 00 00 00 LVRD: : :24/08/2013 04:19 24/08/2013 18:02h/T for vol. regu. On RLDC instruction vide13 43:

Sub-Total 00 19 00 00 58 49: : : 30 52:

Grand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand TotalGrand Total 56 543 3744 46: :: 23 319 : 14

Page 8 of 8

minutes of 89th occm

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