mwrpc.gov.in/pcm/pa_cerc_q4_31122014.pdf · 3 vasai 220 the 100kv busbar protection scheme is...

fully,

...

'I1ffif mcnn:government of India~~~

Central Electricity Authority~~m~~

Western Regional Power Committee~ -~, Q;t~ aBr, ~ (~), ~ - 400 093

. I F-3, MIDC Area, Andheri (East), Mumbai - 400 093~ Phone: 022- 28209506, 28200195; 28200196; ~ Fax: 022 - 28370193

Website: www.wd)c.gov:.:in I E-mail: [email protected]@gmaiI.com

~

~ 11;« 0TI g 9001-2008

IS/ISO: 9001-2008~'1'8

NO. WRPc~ro~ectiO~1P A1201~1o2- 7 r Date: 25.02.2015I iI II

To iIi i

The Secretary, I! ith • I ,

CERC,4 Floorr Cha,nderlok qomplex, 36,

Janpath, New nfIllti 1110001. II I I

I

Sub: comPlianCe!Statur ofProteCit

r

lion aUdIt of Western Region for the quarter ending on 31.12.2014-

Reg. I .I I

I i,{ I

Sir / Madam, I' ~ ". I

Please fidd endlosed herewith the compliance status of protection audit carried out by

utilities (Mahar~shtralas on 39.11.2014, Chhattisgarh as on 31.12.2014 and Madhya Pradesh

as on 31.12.2014, NTPC as 011;:30.11.2014,PGCIL as on 31.12.2014) in Western Region as on

31.12.2014, as per Hon'ble Commission's order dated 05.03.2014 in petition no. 220/MP/2012.

Thanking you,

atyanarayan. S,SE (P), WRPC.

CC:1. COO, CTU, PGCIL, Saudamini, Plot No.2, Sector - 29, Gurgaon - 122001.

"

1 2 3 4 5 6 7 8 9 10 11

Yes/No

WhetherattendedYes/No

If notattended,

reason

Yes/No


If no, expecteddate to attend

1 Wardha 220Faulty Annuciators shall be replacedimmediately

Yes Yes 31.08.14Replaced on dt.15.09.2014

2 Hinganghat 220The annunciator of 220kV TSS-I &Warora are out of service which need tobe replaced immediately.


3 Warora 220The Differntial relay of 220/33kV 50MVAT/F-II shall be replaced


4 Khaperkheda 400 The NDR relay shall be replaced Yes Yes 31.08.14Replaced on dtd.07.06.2014

5 Koradi 400 The NDR relay shall be replaced Yes Yes 31.07.14Replaced on dtd.11.06.2014

6 Deepnagar GCR 220 LBB scheme is not in service Yes No 31.12.14 work is in progress

7 Girwali 400400kV PGCIL CKT I & II -Broken Conductor Detection is off.

Yes No Pertains to PGCIL

8 Girwali 400400kV PGCIL CKT I & II - ZONE 3 &ZONE 4 trip time is same to 1S .

Yes No Pertains to PGCIL

Present Status of Protection Audit Deficiencies (A & B type) in MSETCL for the year 2012-13 as on 19/12/2014

Sr.No.

Name of S/sidentified for

Protection Audit

S/svoltage

(kV)Observations of protection Audit

Deficiencies that can becorrected without

procurement (Category-A)

Deficiencies involvingprocurement (Category-B)

Present Status as on30/09/2014

Sr.No.


Protection Audit

S/svoltage


Expected date toattend

Present Status as on 30/09/2014

1 VASAI 220The ABB make SCADA is in service with standby PC not inworking condition. The GPS & SCADA timing is notmatching due to problem in GPS clock & system.

2 VASAI 220TF LV side data is not available at SCADA due tocommunication failure problems.

3 VASAI 220 The 100kV Busbar protection scheme is not in service. Mar-15Work is in progress.However 220kV Busbar scheme is in service.

4 PADGHE 400

Commissioning of 2 Nosof 220kV Hybrid PASS (GIS Bus-sectionalizer) at Padghe alongwith additional 220kV TBC,2 sets of PTs & shifting of 220kV side bay of ICT3 &strenthening of 400kV & 220kV Bus

Within 1 Year (Afterreceipt of material

at site)work is in progress.

5 PADGHE 400Replacement of 220kV & 100kV static Busbar schemes byNumerical Busbar schemes.

Within 1 Year (Afterreceipt of material

at site)

Existing schemes are in service. However,replacement by Numerical scheme is planned.Pl. ref. **

6 BOISAR 220Replacement of 132kV Busbar protection schemes byNumerical Busbar schemes.

Existing scheme is in service. However,replacement by Numerical scheme is planned.Pl. ref. **

7 KALWA 400Replacement of 400kV Static Busbar protection schemesby Numerical Busbar schemes


8 KALWA 400Shifting of 500 MVA, 400/220kV ICT 1 from 400kV Kalwa IIss to 220kV Kalwa I ss

Completed.

9 URAN 220 All 220kV Control panels needs to be replaced.

The Control panels are very old & needreplacement. The scheme is being prepared byfield office. However, as existing panels are inservice, there is no urgency & will be replacedin a phased manner.

10 APTA 220Replacement of 100kV Busbar protection schemes byNumerical Busbar schemes.


11 APTA 220The C & R panels needs replacement with new ControlRoom.

The C & R panels are very old & needreplacement. The scheme is being prepared byfield office. However, as existing panels are inservice, there is no urgency & will be replacedin a phased manner.

Present Status of other issues identified during Protection Audit for system improvement in MSETCL for the year 2012-13as on 19/12/2014

ABB representative visited site on 23/07/2014 &in co-ordination with M/s ABB work will becompleted by Dec.-2014.

Dec.-2014

Sr.No.


Protection Audit

S/svoltage




12 KANDALGAON 220Replacement of 220kV Busbar protection schemes byNumerical Busbar schemes.


13 KANDALGAON 220Replacement of 100kV C & R panels, also replacement ofTF C &R panels.

Completed.

14 KANDALGAON 220Making LILO of 220kV Nagothane - Mahad line atKandalgaon.

The work is under progress & expected to becompleted by Dec. 2014.

15 NAGOTHANE 400Replacement of 400kV & 220kV Busbar protectionschemes by Numerical Busbar schemes.


16 KHARGHAR 400Replacement of 400kV & 220kV Busbar protectionschemes by Numerical Busbar schemes.


17 TROMBAY 220The work of shifting of 220kV C & R panels from old CR tonewly constructed CR by REL is to be taken on priority.

Mar-15Order is placed & work will be completed byMarch 2015.

18 Kaulewada 220Internal module problems in the exisitng Busbar scheme(ALSTOM-PBLSB). The scheme is maloperated in the pasthence needs to be replaced.


19 Bhandara 220The exisitng Busbar scheme (ABB-RADSS) hasmaloperated in the past due to RQDA module problemand hence needs to be replaced.


20 Kanhan 220 48V DC battery set must be replaced immediately 30.09.14Replacement planed. However, in the meantime set reconditioned between 25.03.2014 to31.03.2014

21 Ambazari 220 The deffective 220V DC battery sets shall be replaced 31.12.14

22 Ambazari 22048V DC set no:-1 efficiency observed as 60%. Battery setneeds replacement.

31.12.14

23 Ambazari 220The exisitng Busbar scheme (ABB-RADSS) hasmaloperated in the past due to RQDA module problemand hence needs to be replaced.


24 Khaperkheda 220The exisitng Busbar scheme (ABB-RADSS) hasmaloperated in the past due to RQDA module problemand hence needs to be replaced.


Sr.No.


Protection Audit

S/svoltage




25 Butibori-I 220The exisitng Busbar scheme (ABB-RADSS) hasmaloperated in the past due to RQDA module problemand hence needs to be replaced.


26 Khadka 400Electromechanical Relays of ICT to be replaced bynumerical one

31.03.15 Tender finalised & LOA issued.

27 Chalisgaon 220Electromechanical Relays of ICT to be replaced bynumerical one.

31.03.15 Tender finalised & LOA issued.

28 BBLR 40002 number of Distance Protection scheme to becommissioned

Will be done innext immediate

outage

Non-availability of outage is major constraint.Relays are available

29 Waghala 220 Line B/U electromechanical relays - 10 31.03.15 Order for retrofit of Back up relays is issued.

30 Akola 220Followg relays are non numerical: *Dist relays (132kVfeeders)- 5 nos. *B/U relays-5 nos *Diffl relays-3 nos.

--

> Disatnce Relay received and configured butpending for company representative/ engineer.The same are being retroffited by Nov. 2014.> Order placed by C.O. for Back up &Differential relays and are yet to be received atstore. Works expected to be completed by31.03.15.

31 Amravati 220

Followg relays are non numerical:*Dist relays- 2 nos.*B/U relays- 4 nos*Diffl relays-3 nos.

31.03.2015

> Distance Relay retrofitted>Order placed by C.O. for Back up &Differential relays and are yet to be received atstore. Works expected to be completed by31.03.15.

32 Badnera 220Followg relays are non numerical:*Dist relays- 2 nos.*B/U relays- 2 nos

31.03.2015

> Distance Relay retrofitted.>Order placed by C.O. for Back up relays andare yet to be received at store. Works expectedto be completed by 31.03.15.

33 Akola 220 Busbar scheme for 132kV bus is not provided Pl. ref. **However 220kV Busbar scheme is in service.

Note: ** Tender has been finalizaed for procurement of 76 Nos. of Busbar protection schemes at various EHV substations in MSETCL. Busbar Protectionschemes will be tentatively receved at site by 31/03/2015 & commissioning works will be taken up thereafter.

Sr.No. Particular Year of

AuditNo. of SSAudited

No. ofDefects

observed

No. ofdefects

attendedPending Defects

No. of defectsCategory

A

No. ofDefects

Category B

1 Logic check of 220/132 KV class substations 2008-09112

(132 KV -48220 KV-64 )

2652 2652 nil 2652 Nil

2 Logic check of 400 KV class substations 2009-10 9 1129 1129 nil 1129 Nil

1 Logic check of 220/132 KV class substations 2012-13121

(132 KV -47220 KV-74 )

1191 1191 nil 1191 Nil

2 Logic check of 400 KV class substations 2013-14 11 611 377 234 611 Nil

Remark:-(1) Audit of 121 nos. of 220/132 KV class substations is completed. All pending defects are atttended which falls in category A. (2) Audit of 11 nos. of 400 KV substations is completed. Following nos. of bays are pending at SS. (i) 400 KV Asoj- 10 nos. (ii) 400 KV Kosamba:- 3 nos. (III) 400 KV Vadavi- 1 nos.

Logic Check (Protection Audit Report) during year 2013-14Part-2

Part-1Logic Check (Protection Audit Report) during year 2008-09-10

Remark:- Audit was conducted during period 2008 to 2010 . All the defects have been successfully resolved.

No. of Defectsin Category A

AttendedYes/NO

Reason fornotattended


AttendedYes/NO


1 132KV Barwala 132 22/6/122 132KV Paliyad 132 19-20/6/123 220KV Dhasa 220 07/12/20124 220 KV Botad 220 17/7/20125 132KV Vallabhipur 132 21/6/126 220KV Otha 220 07/05/20127 220KV Savarkundla 220 16/7/20128 220KV Sagapara 220 07/06/20129 220KV Vartej 220 07/10/2012

10 220KV Anjar 220 22/11/201311 132 KV Samakhiyali 132 23/05/201212 220KV Shivlakha 220 26/12/201313 220 KV Kukma 220 25/12/201314 220KV Nakhatrana 220 20/12/201315 220KV Nanikhakhar 220 27/12/201316 220KV Tappar 220 23/12/201317 132KV Ankleshwar 132 24/9/1218 132KV Valia 132 23/8/1219 220KV Acchalia 220 29/9/1220 220 KV Wagra 220 09/06/201221 220KV Dahej 220 20/9/1222 220KV Kim 220 09/05/201223 220KV Zagadia 220 22/9/1224 220KV Haldarwa 220 09/07/201225 132KV Bharuch 132 18/9/1226 132KV Wankaner 132 14/02/201427 220KV Lalpar 132 02/07/201428 132KV Jasdan 132 15/02/201429 132KV Dhrol 132 02/04/201430 220KV Gondal 220 22/02/201431 132KV Vajdi 132 03/05/201432 220KV Nyara 220 26/02/201433 132KV Vikram 132 02/07/201434 220KV Morbi 220 02/05/2014

Format for Protection AuditName of Utility: Gujarat Energy Transmission Corporation Ltd.

Sr.No.

Name of CircleName of the Substationidentified for audit

S/SVoltage

(KV)

Date on which auditconducted/completed

Observations ofProtection Audit

Remark(Defect)

Deficiences that involves procurment(Category B)

Amreli

Circle/ substaionwise

observation reportenclosed herewith.

NA

No. of Defects:-77Attended(nos.):-77Pending(nos.):- 0

Anjar



NA


Nil NA

NANil9797

Bharuch



NA


Gondal



NA


NANil

NANil7878

Deficiences that can becorrected without procurment

(Category A)

77 77

35 35


AttendedYes/NO



AttendedYes/NO


Sr.No.


S/SVoltage

(KV)



Remark(Defect)



(Category A)

35 132KV Idar 132 19/6/1236 132KV Visanagar 132 20/6/12

06/10/201206/10/2012

39 220KV Bhutiya 220 27/6/1240 220KV Jamla 220 30/6/1241 220KV Vijapur 220 22/6/1242 220KV Dhansura 220 07/04/201243 132KV Talod 132 23/6/1243 132 KV Tilakwada 132 30/4/1344 132 KV Vasedi 132 05/03/201345 220KV Godhra 220 22/5/1346 132KV Dahod 132 05/07/201347 220KV Jambuva 220 24/05/201348 220KV Chandrapura 220 24/5/1349 220KV Gavasad 220 25-6-201350 132KV Gotri 132 07/02/201351 220KV Waghodia 220 30/6/201352 132KV J' Nagar 132 31-6-201353 132KV F"Nagar 132 06/11/201354 132KV Karjan 132 07/03/201355 132KV Manjusar 132 30-6-201356 132 KV Limkheda 132 06/02/201357 132KV Nandesari 132 07/04/201357 220KV Ranavav 220 20/02/201458 132KV Bhatia 132 21/02/201459 220KV Jamnagar 220 14/02/201460 132KV Khambhalia 132 14/02/201461 132KV Naghedi 132 14/02/2014

38 220KV Agiyol 220


28 28 Nil

Himmatnagar



NA


Jambuva



NA

No. of Defects:-125Attended(nos.):-125

Pending(nos.):-

Jamnagar



NA

93 93

NA

Nil NA

125 125 Nil NA


AttendedYes/NO



AttendedYes/NO


Sr.No.


S/SVoltage

(KV)



Remark(Defect)



(Category A)

62 132 KV Bhayavadar 132 18/8/1263 132KV Junagadh 132 09/07/201264 220KV Keshod 220 09/08/201265 132 KV Dhoraji 132 22/8/1266 220KV Motipaneli 220 24/08/201267 220KV Sardargadh 220 09/07/201268 220KV Visavadar 220 25/6/1269 132KV Haripur 132 26/6/1270 132KV Talala 132 27/6/1271 220KV Timbdi 220 07/02/201272 220 KV Kansari(Dhokalva) 220 07/04/201273 132 KV Patan 132 12/02/201374 132 KV Siddhpur 132 27/11/201375 220KV Kheralu 220 26/12/201376 220KV Sankhari 220 29/11/201377 220KV Chhatral 220 21/11/201378 220KV Mehsana 220 21/12/201379 220KV Mitha 220 12/10/201380 132 KV Sabarmati 132 05/12/201281 220KV Salejada 220 30/5/1282 132KV Ode 132 30/4/1283 132KV Undel 132 20/05/1284 220KV Kapadwanj 220 06/09/201285 220 KV Bhat 220 31/05/1286 132KV Narol 132 22/05/1287 132KV Chiloda 132 24/7/12

90 132KV Mahemdabad 13219/05/12,15/7/2012

91 220KV Khanpur 220 19/7/1292 132KV Nadiad 132 18/05/12

88 220KV Karamsad 220 29/4/12

89 220KV Ranasan 220

Junagadh



Mehsana



Nadiad

17/05/12


observationreport

enclosed herewith.

NA


Pending(nos.):-0

NA


NANo. of Defects:-41Attended(nos.):-41Pending(nos.):- 0

89 89 Nil NA

41 41 Nil NA

266 266 Nil NA


AttendedYes/NO



AttendedYes/NO


Sr.No.


S/SVoltage

(KV)



Remark(Defect)



(Category A)

93 220KV Bhilad 22094 220KV Talangpore 220 08/06/201395 220KV Ambheta 220 25/5/1396 132KV Atul 132 16/05/1297 132 KV Bhestan 132 06/10/201398 220KV Ichhapore 220 06/07/201399 220KV Mota 220 05/11/2013

100 220KV Navasari 220 22/5/13101 220KV Vapi 220 09/02/2013102 220KV VAV 220 05/09/2013103 220 KV Thavar 220 09/05/2012104 220KV Tharad 220 09/01/2012105 132 KV Deesa 132 09/06/2012106 220KV Deodar 220 09/11/2012107 220KV Jangral 220 25/8/12108 220KV Palanpur 220 22/8/12109 220KV Radhanpur 220 14/9/12110 220KV Agarthala 220 29/8/12111 132KV Dhandhuka 132 29/1/2013112 132KV Sitagadh 132 30/1/2013113 132KV DHANKDHRA 132 23/1/2013114 220KV Halvad 220 25/1/2013115 220KV Limbdi 220 31/1/2013116 220KV Viragam 220 28/02/2013117 220 KV DUDHREJ 220 02/02/2013118 220 KV RAJPAR 220 02/05/2013119 220 KV BALA 220 02/06/2013120 220 KV ADALSAR 220 23/01/2013121 220 KV DHANKI 220 03/05/2013


Pending(nos.):-0

Navsari



NA


Palanpur



NA


Surendranagar



NA120 120 Nil NA

90 90 Nil NA

52 52 Nil NA

Remarks

Yes /No


If notattended,reason

Yes /No


If no,expecteddate toattend

400 KVKhedamara

400/ 220KV

NTPC/PGCIL& CSPTCLEngineers

19 - 20Feb'13 DC leakage to be monitored Yes Yes

220 KVBemetara

220/ 132KV

CSPTCLEngineers 13.03.13

1. Carrier protection is not available..2. 2nd DC battery set is not available.3. GPS time synchronizing facility is notavailable.4. M II protection for 220 KV feeder notavailable.5. DC leakage to be monitored.

S.No.5 Yes - Yes for S.No.

1 to 4 No 31.03.15 -

220 KV Gurur 220/ 132KV


1. Carrier protection is not available..2. M II protection for 220 KV feeder notavailable.3.DC leakage to be monitored.


1 & 2 No 31.03.15 -

220 KV Sohela 220/ 132KV


1. Carrier protection is not available..2. GPS time synchronizing facility is notavailable.3. M II protection for 220 KV feeder notavailable.4. DC leakage to be monitored.


1 to 3 No 31.03.15 -

220 KVBhatapara

220/ 132KV


1. Carrier protection is not available..2. 2nd DC battery set is not available.3. GPS time synchronizing facility is notavailable.4. M II protection for 220 KV feeder notavailable.5. DC leakage to be monitored.6. LBB protection not available.


1 to 6 except 5 No 31.03.15 -

220 KV Mopka 220/ 132KV


1. Carrier protection is not available..2. 2nd DC battery set is not available.3. GPS time synchronizing facility is notavailable.4. M II protection for 220 KV feeder notavailable.5. DC leakage to be monitored.6. LBB protection not available.7. Synchronization trolly not available.


1 to 7 except 5 No 31.03.15 -

PROTECTION AUDIT DEFFICIENCIES/OBSERVATIONS COMPLIANCE [As on 31.12.2014]Name of Utility : CHHATTISGARH POWER TRANSMISSION COMPANY LIMITED

Name of S/Sidentified for

protectionaudit

S/Svoltage

Name of 3rdparty

protectionaudit agency

Date onwhich auditconducted

Observations of protection audit

Deficiencies that can be correctedwithout procurement (Category-A)

Deficiencies involving procurement(Category-B)

220 KV Banari 220/ 132KV




1 to 6 except 5 No 31.03.15 -

220 KV Siltara 220/ 132KV




1 to 7 except 5 No 31.03.15 -

220 KV Doma,Raipur

220/132KV




1 to 4 No 31.03.15 -

220 KVParaswani

220/132KV



S.No.2&5 Yes - Yes for S.No.

1,3& 4 No 31.03.15 Second battery setcommissioned.

220 KV Urla 220/ 132KV




1 to 6 except 5 No 31.03.15

220 KVThelkadih

220/132KV

CSPTCLEngineers

1. Carrier protection is not available.2. 2nd DC battery set is not available.3. GPS time synchronizing facility is notavailable.4. M II protection for 220 KV feeder notavailable.5. DC leakage to be monitored.


1 to 4 No 31.03.15 -

220 KVBarsoor

220/132KV



S.No.2&5 Yes - Yes for S.No.

1 & 3,4& 6 No 31.03.15 Second battery setcommissioned.

220 KV Bhilai 220/132KV


1. Carrier protection is not available.2. M II protection for 220 KV feeder notavailable.3. DC leakage to be monitored.4. LBB protection not available.


1 to 4 except 3 No 31.03.15 -

220 KVKotmikala

220/ 132KV




1 to 7 except 5 No 31.03.15 -

220 KV Raigarh 220/ 132KV



S.No.5 Yes - Yes forS.No.

1 to 7 except 5 No 31.03.15 -

1. Separate two sets DC system isrecommended for switchyard protection No Yes Estimate and Requisition for

separate DC source has been2. Carrier Protection is out of service. Yes Yes, for 220

kV KorbaRest feeder'scarrier prot.

For carrier protection panel/cardsprocurement required.

3. Disturbance Recorder and SERs arenot available. Yes Estimate processed for approval.

Tendering is under progress

4. Old THR make Static DPR relaysneeds to be replaced by numerical relays Yes NA NA Tenders vetted & proposal sent

for final approval

5. Auto re-closer is not available. Yes NoAuto reclose of 220 KV Korba-Budipadar ckt-3 is checked & putin service.

6. Bus Bar Differential scheme is notavailable. Yes

7. All relay settings are verified andfound to be generally in order. Yes Yes

8. Multiple Earthing is not found in CTsecondary. Yes Yes

9. PSB feature is Enabled for Z2, Z3,and Z4. Yes Yes

10. Synchronizing Panel is available forall feeders except Budhipadar Feeder No- Yes Yes

1) Two independent source of 220 V DCare available in Switchyard.No DC

YES YES

Name of Utility : CHHATTISGARH POWER GENERATION COMPANY LIMITED

220 KV KTPS,Korba (E) 220 KV

M.K.BanchhorCSPTCL,

N.P.DewanganNTPC,

N.K.BizoraCSPGCL,G.P.Rai

CSPGCL,S.C.Chakrabor

ty CSPGCL

25.04.2013

220 KVDSPMTPS,

Korba220 KV

Third PartyProtectionAudit was

carried out bySE(ET&I-I)

HTPS,CSPGCL,Representati

ve ofNTPC,EE,CSPTCL,EE(Testing),DSPMTPS,

CSPGCL

25.04.2013

2) All relay settings are verified & foundgenerally in order. YES YES

3)Dual channel carrier protection isavailable in all 220 KV feeders but keptout

YES No

Due to nonavailability ofPanel atremote end.4) DRs are available in Numeric relays

and SER is available. YES YES

5)Multiple earthing of CT secondary coreis not available. CT secondary earthing YES YES

6) 01 no synchronising trolley is available& in working condition. YES YES

7)PSB feature is enabled & in blockingcondition for Z2,Z3 & Z4. YES YES

8) Auto reclose is available but presentlykept out. YES No As carrier

protection is9) Bus Bar differential scheme isavailable but presently kept out. YES No To be

checked1) Non availability of Main-II protection Yes2) Non availability of Auto reclosescheme. Yes

3) Non availability of B/B differential &LBB protection Yes No 31.10.2014

Bus Bar protection panel hasbeen installed & laying of cablesis in progress.

4)GPS is available however no relay issynchronised with it. Yes No 31.05.2014 Relays have been synchronised

with new GPS.5) Replacement of ABCB with SF6breakers & commissioning of isolatorsequential operation with ABCB opening. Yes No 31.03.2016

Replacement of ABCB with SF6breakers is included in the scopeof work of R&M of stationproposed in year 2015-16

1) Second DC system is recommended . Yes No 31.03.2016 Proposed in the year 15-16 inRefurbish Scheme.

2) To renovate/retrofit Main-I & Main-IIProtection with numeric relays in all outgoing feeders.

Yes

Main-I & Main-II Protection withnumeric relays in all out goingfeeders completed on28.12.2014

3) Carrier Protection is not in service. 02 no. havebeencommissioned in KEB-KWB interconnectors

Yes No 31.03.2016

In KEB-KWB interconnector I & IIcarrier protection has been takenin service.In KW-DSPMI/C,action from DSPM isawaited.Other 3 feeders fallsunder CSPTCL scope

4) Disturbance Recoder and SER s arenot available.

Yes No 31.03.2015

Bay control panels for SCADAsystem have been received .M/sABB is being persuaded tocommission the same as earlyas possible.

5) Non availability of Auto reclosescheme. Yes No 30.03.2015

Scheme is ready from KWBend,waiting for consent forconnected sub stations.

6) Non availability of B/B differential Yes No 31.03.2015 Work under progress. 7) Non availability of LBB protection Yes YES LBB has been kept in service8)GPS is available however no relay issynchronised with it. Yes No 31.03.2015

After commissioning of SCADApanel, Relays will besynchronised.GPS facility isavailable in SCADA.

ABB Make Relay & controlpanels equipped with Main-I &Main-II protection and Autoreclose of feeders have been

Korba WestTPS 220 KV

NTPC &CSPTCL

Engineers26.04.2013

Korba WestTPS 400 KV

NTPC &CSPTCL

Engineers26.04.2013

220 KVDSPMTPS,

Korba220 KV

Third PartyProtectionAudit was

carried out bySE(ET&I-I)

HTPS,CSPGCL,Representati

ve ofNTPC,EE,CSPTCL,EE(Testing),DSPMTPS,

CSPGCL

25.04.2013

Yes/NoWether

attendedYes/No

if notattendedreason

Yes/NoWether

attendedYes/No

if no, expecteddate to attend

1. Time synchronisation problem of protective relays with GPS Yes Yes NIL NIL NIL NIL2. Providing of Separate Event Logger NIL NIL NIL YES NO 4 months WORK IN PROGRESS3. Providing of adequate fire protection system. Yes Yes NIL NIL NIL NIL4. Replacement of 220KV Static Bus Bar system with Numeric NIL NIL NIL YES YES NIL5. Providing of additional Backup element on 315MVA TF -III Yes Yes NIL NIL NIL NIL1. Replacement of 1No 132KV NGEF SF6 CB of BHEL Bay Yes Yes NIL NIL NIL NIL2. Replacement of Electromechanical O/C & E/F relays of Incomerswith numerical relays.

Yes Yes NIL NIL NIL NIL

3. Provision for taking REF protection in Circuit on 160MVA,3x40MVA and 100MVA Transformers


4. Providing of Additional wave trap on 220KV Inter Connector-II Yes Yes NIL NIL NIL NIL1. LBB scheme to be taken in service Yes Yes NIL NIL NIL NIL2. Providing of 220KV Bus Bar Protection Scheme NIL NIL NIL YES YES NIL3. LAs leakage Current measurement to be done Yes Yes NIL NIL NIL NIL1. Replacement of Static/Electromechanical DPR by Numerical relays Yes Yes NIL NIL NIL NIL2 Commissioning of new 600AH 48V Battery Charger Yes Yes NIL NIL NIL NIL3 Synchronisation of GPS system with protection of 132KV Traction-I& II feeders


1. Zone-III setting of 220KV Gwalior-Bina-I & II to be reviewed Yes Yes NIL NIL NIL NIL2 Extending GPS time synchrinising facility to all panels Yes Yes NIL NIL NIL NIL3 220KV Bus Bar scheme to be provided NIL NIL NIL YES YES NIL4. Providing of NIFPS on 3x40MVA 220/132KV Transformer NIL NIL NIL YES NO 6 months5. Providing of DG set NIL NIL NIL YES NO 6 months Procurement in process1. 33KV, 25MVAr reactor of 315MVA Tr-I to be taken back inservice by replacement of R phase 33KV Bushing and repair of 33KVCB.


2 Oil leakage from B phase Turret of 400KV Bushing of 315MVANo-I

Yes Yes NIL NIL NIL NIL3. 33KV, 25MVAr reactor of 315MVA Tr-II to be taken back inservice by replacement of R phase 33KV Bushing and repair of 33KVCB.


4. Mixing of 220V DC source-I & II to be rectified Yes Yes NIL NIL NIL NIL5. Replacement of B phase CVT of 400KV Main Bus-II Yes Yes NIL NIL NIL NIL6. Auto Check synchronising facility is not in service Yes Yes NIL NIL NIL NIL7. Extending GPS connectivity to balance DPRs and Differential relays Yes Yes NIL NIL NIL NIL

8. Providing of Separate Event Logger NIL NIL NIL YES NO 4 months Work in progress9. Connecting 220KV Bus Bar Panel for tripping Yes Yes NIL NIL NIL NIL10 Testing of DPR of 220KV Interconnector-II Yes Yes NIL NIL NIL NIL1 Providing of Emergency light in Control and Battery Room Yes Yes NIL NIL NIL NIL2 Providing GPS connectivity in 400KV Controlpanels Yes Yes NIL NIL NIL NIL3. DG set not provided NIL NIL NIL YES YES NIL4. 400KV Bus Bar protection out of service Yes Yes NIL NIL NIL NIL

6 Bina 400

7 Katni 400

4 Bina 220

5 Gwalior 220

2 Bhopal 220

3 Mandideep 220

Name of Utility - MADHYA PRADESH

Deficiencies that can becorrected without procurement

(Category-A)

Deficiencies involving procurement(Category-B)

1 Bhopal 400

Sl.No.

Name ofidentified for

ProtectionAudit

S/SVoltage

Observation of Protection Audit Remarks



(Category-A)

Deficiencies involving procurement(Category-B)Sl.

No.


ProtectionAudit

S/SVoltage

Observation of Protection Audit Remarks5 High resistance of Earth pit of 220KV PGCIL-II bay Yes Yes NIL NIL NIL NIL6. 220KV side LBB to be commissioned Yes Yes NIL NIL NIL NIL7 Directional E/F feature to be enabled on 220KV Birsinghpur andDamoh feeder.


8. REF protection on 160MVA TELK Tr. To be enabled Yes Yes NIL NIL NIL NIL1. Relay setting of 132KV Malanpur-Banmore-I feeder to be reviewed Yes Yes NIL NIL NIL NIL

2. Zone-III setting of 220KV Malanpur-Auraiya feeder to bereviewed


3. Providing of DG set NIL NIL NIL YES NO 6 Months Procurement in process4. DC leakage in 110V DC system to be removed Yes Yes NIL NIL NIL NIL5. GPS time synchronising to be extended to Transformer panels Yes Yes NIL NIL NIL NIL6. Providing of NIFPS on 160MVA 220/132KV Transformer-II NIL NIL NIL YES NO Under Process7. 220KV Bus Bar protection to be taken into circuit for tripping Yes Yes NIL NIL NIL NIL8 Earth resistance of 20 and 40MVA transformer pits are not taken Yes Yes NIL NIL NIL NIL1. SSRR3V scheme on 132KV Bhind feeder to be replaced Yes Yes NIL NIL NIL NIL2. 220KV and 132KV feeder DPRs Zone-II & III settings to bereviewed


3. DC leakage in 110V DC system to be removed Yes Yes NIL NIL NIL NIL4. GPS time synchronising facility to be extended to 132KVBhind,Seondha feeder and 160MVA BBL Transformer panels


5. Providing of NIFPS on 160MVA 220/132KV Transformer-II NIL NIL NIL YES NO Under Process6. 220KV Bus Bar protection scheme to be taken into circuit afterconfiguration of new 160MVA BBL transformer


1. 220KV Bus Bar scheme to be provided NIL NIL NIL YES YES NIL Reecently commissioned2. 160MVA TransformerI & II panels are synchronised with GPSsystem, other panels needs to be synchronised


3. Oil temp. indicator is not available in 20MVA Transformer Yes Yes NIL NIL NIL NIL4 Earth resistance meaurement to be done Yes Yes NIL NIL NIL NIL5. Zone-II & III settings of DPRs of 220KV PGCIL,132KV Arniyafeeders to be checked


1. CT junction Box earthing in 132KV Bays to be strengthen Yes Yes NIL NIL NIL NIL2. 220KV and 132KV CB Marshalling Box earthing to be checkedand strengthen


3 IOC feature in Differential and DPR relays to be enabled fromreliability point of view


4. Over fluxing alarm and Trip time settings may be verified andcorrected


1. AREVA make 220KV CB marshalling Boxes are not properlyearthed


2. Minor DC leakage found in 110V DC source-II Yes Yes NIL NIL NIL NIL3. Five nos DPRs (220KV Handiya-I&II, Barwaha,Sarni-Iii andTransfer B/C) are not time synchronised with GPS


4. Auto reclosed feature is to be made operational Yes Yes NIL NIL NIL NIL5. LBB and Bus Bar protection scheme have to be taken in to circuit Yes Yes NIL NIL NIL NIL6. H.Set feature of Differential relays to be enabled Yes Yes NIL NIL NIL NIL1. GPS is installed but not functioning, to be taken into service Yes Yes NIL NIL NIL NIL

12 Itarsi 220

13South ZoneIndore

220

10 Shujalpur 220

11 Hoshangabad 220

8 Malanpur 220

9 Mehgaon 220

7 Katni 400



(Category-A)


No.


ProtectionAudit

S/SVoltage

Observation of Protection Audit Remarks2. 220KV Bus Bar protection scheme is ASEA make needs to bereplaced with numerical scheme

NIL NIL NIL YES YES NIL

3. Providing of DG set NIL NIL NIL YES NO 6 months Procurement in process4 Numeric DPR on 220KV Jetpura feeder to be provided Yes Yes NIL NIL NIL NIL5 DTOC setting of Transformers may be reviewed with latest faultlevel and CT ratio


1. GPS is installed but intermittent outage of GPS has been reported,needs to be discussed with manufacturer


2. Uniformity in settingds of both 160MVA transformers may bereviewed


3. Rajgarh-II DPR relay setting to be reviewed for Phase/GroundImpedance for Zone-III


4. Providing of DG set NIL NIL NIL YES NO 6 months Procurement in process5 V/F protection in any of Differential relay on 132/33KVTransformers not enabled


1. Some numerical relays are not time synchronised with GPS Yes Yes NIL NIL NIL NIL2. 220KV Bus Bar protection scheme is ASEA make needs to bereplaced with numerical scheme

NIL NIL NIL YES YES NIL

3. V/F setting for 3x40MVA, 63MVA ,40MVA is not enabled Yes Yes NIL NIL NIL NIL4. REF is not enabled in 220KV and 132KV Transformers, to beenabled


5 LBB protection for 220KV Class Transformers to be commissioned Yes Yes NIL NIL NIL NIL

6. Providing of DG set NIL NIL NIL YES NO 6 months Procurement in process1. GPS system for relay time synchrinisation is out of order Yes Yes NIL NIL NIL NIL2. Automatic Fire Protection System( NIFPS) to be installed on allTransformers


3. Fire extinguishers are available but to be placed at appropriatelocations as per requirement.


4. Air Conditioning system should be provided in the Control Room NIL NIL NIL YES NOMatter is underconsideration.

1 Bus Bar protection system is provided but is in alarm mode only. Yes Yes NIL NIL NIL NIL

2. 110V DC System is having earth leakage problem Yes Yes NIL NIL NIL NIL3. Automatic Fire Protection System (NIFPS)to be installed on allTransformers

NIL NIL NIL YES NOMatter is underconsideration.

4. Synchronising scheme must be provided as many Hydel Generatorsare connected to the 220KV and 132KV Bus.

Yes Yes NIL NIL NILAt S/S end it is not required as it is provided atGenerating S/S end.

5. Lighting Visibility in the Control Room should be increased Yes Yes NIL NIL NIL NIL6. Fire extinguishers are available but to be placed at appropriatelocations as per requirement.


7. REF feature in 160MVA CGL is not enabled. Yes Yes NIL NIL NIL NIL8. Load dropping scheme on Transformers must be connected. Yes Yes NIL NIL NIL NIL1. GPS system is available but the relays are not connected to it. Yes Yes NIL NIL NIL NIL2 Bus Bar and LBB protection of B-90 Bus Bar protection scheme isnot in service due to Y phase CT module defect.

Yes Yes NIL NIL NIL NIL3 Earth leakage problem in 110V DC system is there. Yes Yes NIL NIL NIL NIL4. REF feature in 160MVA BHEL is not enabled. Yes Yes NIL NIL NIL NIL18 Satna 220

16 Jabalpur 220

17 Rewa 220

14 Pithampur 220

15 Barwaha 220

13South ZoneIndore

220



(Category-A)


No.


ProtectionAudit

S/SVoltage

Observation of Protection Audit Remarks5. Automatic Fire Protection System( NIFPS) to be installed on160MVA AREVA Transformer


6. REF protection is not available on 160MVA BHEL transformer Yes Yes NIL NIL NIL NIL1. Oil leakage observed from 33KV Tertiary Bushing Turret of BHELTransformer


2. Fire extinguishers are not available at Control Room Yes Yes NIL NIL NIL NIL3 Providing of Emergency light in Control room Yes Yes NIL NIL NIL NIL4 Internal panel cabeling/Wiring of Control panel is meshed Yes Yes NIL NIL NIL NIL1. GPS system is not connected with all relays Yes Yes NIL NIL NIL NIL2. 48V Battery Charged is working in only Boost mode. Yes Yes NIL NIL NIL NIL3. Automatic Fire Protection System (NIFPS)to be installed on bothTransformers


4. 220KV Bus Bar scheme to be provided NIL NIL NIL YES YES NIL

21 Barod 220 1. GPS system is available but some relays are not connected to it. Yes Yes NIL NIL NIL NIL1. GPS system is available but some relays are not connected to it. Yes Yes NIL NIL NIL NIL2. 220KV Bus Bar scheme to be provided NIL NIL NIL YES NO 4 months By April 153 V/F protection in any of Differential relay on 132/33KVTransformers not enabled


4 DTOC setting of Transformers may be reviewed with latest faultlevel and CT ratio


5. Float mode of 110V DC Charger is defective Yes Yes NIL NIL NIL NIL6 In 220KV Julwaniya-Omkareshwar, Zone-III time setting is800ms.It is not programmable as push buttons are not working andrelay communication software is not available. It may be rectifiedsoon.


1.GPS system is available but some relays are not connected to it. Yes Yes NIL NIL NIL NIL2. 220KV Bus Bar scheme to be provided NIL NIL NIL YES NO 4 months By April 153. Float mode of 110V DC Charger is defective Yes Yes NIL NIL NIL NIL

24 Indore-IIJetpura

220

1. Time synchronisation system is available with GPS, Its connectivitywas made with all 220KV DPR/Differential relays. As this has createdproblem in functioning of DPR/Differential ralays, timesynchronisation system is disconnected. Rectification of the problemand connectivity of time synchronisation system with all the relays isto be done.


25 Ujjain 2201. Time synchronisation system is available with GPS system, itsconnectivity is made with few 220KV & 132KV relays, Connectivityfor the rest of the system is to be done.


1. 220KV DC system voltage have been checked w.r.t. (+ Ve) toearth=136V, (-Ve) to Earth=89V, and to be rectified


2. 220V DC Source I & II mixing possibility is there and to bechecked.


3. Float charger of 220V systemis not working in both chargers andpresently chargers are working in Boost charging mode.


4. Illumination in AC/DC room is very poor and same to be rectified Yes Yes NIL NIL NIL NIL5. All 400KV and 220KV line relays are numerical except Main-Irelayof 400KV Nagda-Indore, which has been installed and has to beconnected.


23 Nimrani 220

26 Nagda 400

20 Sagar 220

22 Julwaniya 220

18 Satna 220

19 Damoh 220



(Category-A)


No.


ProtectionAudit

S/SVoltage

Observation of Protection Audit Remarks6. Separate event logger for S/S is not available and needs to beprovided.

NIL NIL NIL YES NO 4 months Work in progress

7. Directional E/F features is to be enabled on followingfeeders,400KV Main-II Relay (GE D60), 400KV ISP Main-II (ABBREL 521) and 400KV Rajgarh I & II ( Alstom make EPAC 3000relayis to be replaced by SEL 311C relay and feature has to be enabledsoon)


8. 25MVAr 33KV Reactors installed on Tertiary winding of ICT-IIand ICT-IIIre out of order since long time.


1. Time synchronisation system is available with GPS system, itsconnectivity is made with all 220KV & 132KV DPR/Differentialrelays. Its connectivity with Bus Bar Relay B-90 is to be done.


2. CT sec. core meant for back up protection is also used for Bus Barprotection for number of 220KV bays.For Bus Bar protection schemePS class of CT Sec core is to be used.


1. Tertiary Reactor of 315MVA Tr-I & II are not being taken inservice due to high Tan delta values of Bushings, which should bereplaced and reactors should be taken in to service.

NIL NIL NIL YES NO Under Process

2 On 400KV side Bus Bar relay make EE type FAC iselectromagnetic type relay and it is very old and obsolete. Its sparesare not available,This scheme may be replaced with the numerical BusBar protection scheme.

NIL NIL NIL YES NO 4 months

3. REF protection of 315MVA EMCO Tr-IV is kept under observation, which may be taken in to service.


4 220V DC Charger make Statecon is commissioned but not takeninto service due to some problem. It should be rectified and taken intoservice.


5. Additional DC distribution Board is available should be taken intoservice to separate the DC distribution to individual feeders.


6 GPS time synchronisation system is available , Relays of 315MVATransformers I,II & III are connected. All the relays of other feedersand Transformers are to be connected.


7. Tripping/Closing time of 400KV Itarsi-I & II and Asoj-I & II CBsare not recorded.Same may be collected from PGCIL and update therecord.


8. Zone-III reach setting of 400KV Asoj-I & ii feeders are given as120% of protected line (31.23 Ohm, Sec. value) Which is inadequateas backup zone protection. The time delay setting for Zone-III is givenas 1000mSec.in all PGCIL feeders.Same may be reviewed in


9. No DC leakage observed, but mixing of Dc source-I & II dected.Itshould be rectified.


29 ATPS#5 220Hathway make GPS time synchronising system is provided butconnected on 220 KV Birsinghpur-3 & Sidhi feeders only, all otherrelays of feeders & transformers are to be connected.

Yes YES COMPLETED

30 ATPS#5 220REF protection not provided on 220/132 kv ICTs, it is suggested toprovide the same.

NOT REQUIRED DUE TO SHIFTING OF 132KV SWITCYARD

31 ATPS#5 220ASEA make 132 kv MOCBs are in service,which is very old andinaquate as per the increased fault MVA of the site.It is suggested toreplace same

NOT REQUIRED DUE TO SHIFTING OF 132KV SWITCYARD

27 Ratlam 220

28 Indore 400

26 Nagda 400



(Category-A)


No.


ProtectionAudit

S/SVoltage

Observation of Protection Audit Remarks32

SGTPS 1 TO4

220 Partial DC leakage observed, it is advised to recify the same. Yes YES COMPLETED

33 TONS HPS 220 PLCC ROOM - Dead Rodents odor was felt. YES YES COMPLETED

34 TONS HPS 220220 KV Feeders - TMS of directional E/F is 0.1 second. It appears verylow and to be reviewed in reference to fault MVA of Tons HPS.

YES YES COMPLETED

35 TONS HPS 220220 KV Feeders - Female contact of R & Y phases of bus-2 isolator of220 KV Rewa feeder-2 is not available. Hence, it is not possible to puton this bus in case of any eventuality.

YES YES COMPLETED

36 TONS HPS 220RELAYS - Zone 3 time setting of 220 KV feeders is 600 miliseconds and it may be 700 milli seconds as per new instruction.

YES YES COMPLETED

37 STPS PH-II 220 Scaling is observed on the terminal of some of the batteries. YES YES COMPLETED

38 STPS PH-II 220L&T make switchgear indicating lamp assembly is missing and theyare vacant i.e whole are uncovered.

YES YES COMPLETED

39 STPS PH-III 400 220v dc battery source - no alarm for dc e/f is provided in the chargers. YES YES COMPLETED

40 STPS PH-III 400220v dc battery source - capacity test has been conducted in the year2011. recommended to do the capacity test once in a year.

YES YES COMPLETED

41 STPS PH-III 400220 V DC battery source - records indicated the voltage measurementof individual cells with the charger on condition. This readings are tobe taken with charger off condition also.

YES YES COMPLETED

42 STPS PH-III 400220 V DC battery source - Scaling is observed on the terminals ofsome of the batteries. Also the general cleanliness of the batteries andbattery room need improvement.

YES YES COMPLETED

43 STPS PH-III 400ISP Feeder - Over voltage stage i and stage ii protection has beenprovided through separate rxeg-21 relays.

YES YES COMPLETED

44 STPS PH-III 400ISP Feeder - over voltage stage ii setting has been adopted as 130% .this should be reviewed.

YES YES COMPLETED

45 ATPS#5 220220 kv static Bus Bar Protection scheme make ABB, type RADSS isavailable at site since 2000, but awaited for commissioning.

Yes No JUNE'15Order no. 4515 dtd.27.11.14 placed to M/s GEIndia Industrial Pvt. Ltd. Bangalore

46 ATPS#5 220LBB Protection is not provided for any element and it is suggested totake in service at earliest


47 ATPS#5 220

Auto Reclosure feature is provided for 220 KV Birshingpur - 3,Jabalpur I & II and Sidhi feeders only. For other 220 KV feeders AutoReclose facility is available but not be commissioned due to nonavailability of PLCC protection couplers.

Yes No JUNE'15DELAY IN COMPLETION DUE TO NON-AVALIABILTY OF PLCC PANELS FROMMPPTCL FOR OTHER END

48 ATPS#5 220One set of 600 AH battery set is provided for switch yard, which isvery old and in poor condition its need early replacement.BatteryCapacity test could not be done due to some opertional problem.

Yes No 15-16PROCUREMENT OF BATTERY IS IN UNDERPROGESS, NIT HAS BEEN PUBLISHED

49 ATPS#5 220

A stand by DC supply is available at switchyard to power plant,DCload of 220 kv panels are running on this supply.It is recommended bycommittee to provide separate DC supply arrangement for power plantand switchyard.

Yes No 15-16 SHALL BE DONE SHORTLY

50SGTPS 1 TO4

220220 KV Bus Bar Protection is available but not in service due to someproblems

Yes No Sep-15

Order no. 4515 dtd.27.11.14 placed to M/s GEIndia Industrial Pvt. Ltd. Bangalore and afterreceipt of material at site atleast 6-9 months will berequired to put the system into service subject toavailability of shutdown on different sections of220 KV switchyard.



(Category-A)


No.


ProtectionAudit

S/SVoltage


51SGTPS 1 TO4

220LBB Protection relay are available but protection are not provided forany element and it is suggested to put the same in service.

Yes No Sep-15

Order no. 4515 dtd.27.11.14 placed to M/s GEIndia Industrial Pvt. Ltd. Bangalore and afterreceipt of material at site atleast 6-9 months will berequired to put the system into service subject toavailability of shutdown on different sections of220 KV switchyard.

52SGTPS 1 TO4

220ESR/DR is not installed but it available in numerical relays provided in220 kv pali interconnector-I and 220 kv Sukha feeders only.

Yes YES

DR FACILITY IS NOW AVAILABLE WITHINSTALLATION OF NEW DPR CSC-101RELAY.HOWEVER OFFER FOR ESR ISCALLED FROM MANUFACTURE.

53SGTPS 1 TO4

220Auto reclose facility not provided on any 220 kV feeders. It isintimated that protection couplers are not available and it is suggestedto provide the same.

Yes No JUNE'15

PROCUREMENT OF NEW PLCC IS UNDERTENDERING STAGE AT (P&W) CELL.AFTERRECEPIT OF MATERIAL ATLEAST 3 MONTHWILL BE REQUIRED TO PUT THE SCHEMEINTO SERVICE.

54SGTPS 1 TO4

220GPS based time synchronisation facility is not available. It is suggestedto provide the same.

Yes NO JUNE'15ADMINISTRATIVE APPROVAL FORNETWORKING WITH OFC LANE SCHEME OFMCR & ECR IS UNDER PROCESS.

55SGTPS 1 TO4

220A separate source for 220 kV dc supply is provided for electricalcontrol room and 220 kv switchyard. This battery set is very old,commissioned 1991 needs replacement.

Yes NO JUNE'15ADMINISTRATIVE APPROVAL IS UNDERPROCESS.

56SGTPS 1 TO4

220Emulsifier system is provided on GT and UAT for Fire protection.Same is operate manually.

Yes No JUNE'15SYSTEM IS WORKING IN MANUAL MODEAND AUTO OPERATIOM WILL BE STARTEDSHORTLY.

57 SGTPS # 5 400Static Bus Bar Protection scheme is provided on 400 kV bus makeABB Type-RADHA. A numerical Bus-Bar protection scheme may beprovided as suggested by the committee.

Yes No 15-16ADMINISTRATIVE APPROVAL IS UNDERPROCESS.

58 SGTPS # 5 400DG set available in power plant and it is suggested by the committee toextend AC supply as stand by to 400 kV control room and switchyardin case of emergency.

Yes No 15-16 WILL BE DONE SHORTLY .

59 SGTPS # 5 400Spare unit of single phase ICT is not ready to use, it should be attentedand kept in ready condition in case of emergency.

Yes YES WORK COMPLETED

60 SGTPS # 5 400High voltage problem are reported and it is suggested to provide busreactor or line reactor on 400 kv BRS-Damoh line I & II at BRS end.

Yes NoNOT POSSIBLE AS AVALIABILE SPACE HASALREADY BEEN UTILISED BY M/s PGCIL.

61 SGTPS # 5 400400 KV BRS - BAlCO and BRS-Vandana Power (KORBA) baysbelongs to PGCIL

UNDER SCOPE OF M/s PGCIL.

62 TONS HPS 220 DG Set – Over current protection is out of service. Yes No UPTO 2015-16PROCUREMENT OF OVERCURRENTPROTECTION RELAY SHALL BE DONE UPTO2015-16 DUE TO LACK OF FUND.

63 TONS HPS 22048 Volt DC System - Battery set is placed on the floor without puttinginsulator.

Yes No UPTO 2015-16PROCUREMENT OF BATTERY SET SHALL BEDONE UPTO 2015-16 .

64 TONS HPS 220PLCC ROOM - No PLCC cabinets for Rewa – 1, Rewa - 2 & Kotardirections.

Yes No UPTO 2015-16 PROCUREMENT OF MATERIAL INITIATED

65 TONS HPS 220Communication - Communication to 220 KV Kotar s/s is notavailable


66 TONS HPS 220Communication - Communication to 220 KV Rewa s/s is notavailable




(Category-A)


No.


ProtectionAudit

S/SVoltage


67 TONS HPS 220

Communication - Mode of communication with SLDC is very poorwhich may be improved by providing Landline phone in control roomor by other suitable means. PLCC communication to Jabalpur ishaving much hauling.


68 TONS HPS 220 RTU - Active power transducer of 220 KV Rewa feeder-2 is found out. Yes No UPTO 2015-16 PROCUREMENT UNDER PROCESS.

69 TONS HPS 220 RTU - Alternate data channel to SLDC is not available. Yes No UPTO 2015-16 PROCUREMENT OF MATERIAL INITIATED

70 TONS HPS 220220 KV Feeders - Carrier Protection & Auto re-closure feature has notbeen commissioned

Yes No UPTO 2015-16PROCUREMENT OF NEW DUPLEX CONTROLAND RELAY PANEL UNDER PROCESS.

71 TONS HPS 220220 KV Feeders - 220 KV feeders’ isolators with earth switch are notin working order.

Yes No UPTO 2015-16ORDER PLACED AND WORK COMPLETEDWITHIN SPECIFIED TIME UPTO 2015-16

72 TONS HPS 220 Transformer - MOLG of all the GTs are not working. YES No Shall be RECIFIED IN UPCOMING AOH

73 TONS HPS 220 Station Transformer - 33 KV lightening arrestor found disconnected. YES No UPTO 2015-16 Shall be RECIFIED IN UPCOMING AOH

74 TONS HPS 220Generator Transformer - No mechanical tripping on existing 220 KVGas Circuit Breaker of generator transformer and it is Single PoleMechnism, it shall be Gang operated circuit breaker.

YES No UPTO 2015-16 PROCUREMENT OF MATERIAL INITIATED

75 TONS HPS 220 Fire Protection – Generator fire protection is not in working order. YES No UPTO 2015-16ORDER PLACED TO FIRM AND WORKSHALL BE COMPLETED SHORTLY.

76 TONS HPS 220 Governor - Unit 1 & 2 are on manual mode of governor operation. Yes No UPTO 2015-1690% MATERIAL RECEVIED AT SITE ANDWORK COMPLETED IN AOH OR IN SHUNTDOWN PERIOD.

77 TONS HPS 220RELAYS - Generator Protection & transformer protection is providedthrough electromechanical relays. It is to be provided with numericrelays.

Yes No UPTO 2015-16PROCUREMENT UNDER PROCESS ANDCOMPLETED UPTO 2015-16

78 TONS HPS 220RELAYS - The existing bus bar protection is un-commissioned andobsolete. It is to be provided through Numeric relays.


79 TONS HPS 220 RELAYS - LBB protection is not commissioned on 220 KV feeders. Yes No JUNE'15Order no. 4515 dtd.27.11.14 placed to M/s GEIndia Industrial Pvt. Ltd. Bangalore

80 TONS HPS 220 RELAYS - Carrier protection is not available on all 220 KV feeders. Yes No UPTO 2015-16PROCUREMENT UNDER PROCESS ANDCOMPLETED UPTO 2015-16

81 TONS HPS 220 RELAYS - 220 KV Bus coupler earth fault relay is out of order Yes No UPTO 2015-16PROCUREMENT UNDER PROCESS ANDCOMPLETED UPTO 2015-16

82 TONS HPS 220RELAYS - Some of the protection/ auxiliary relays are not havingcover to prevent from dust, moisture and water etc.

Yes No UPTO 2015-16PROCUREMENT UNDER PROCESS ANDCOMPLETED UPTO 2015-16

83 TONS HPS 220Earth Resistance – Earth Resistance record has not produced for220/33 KV switch yard & electronic earthing of DAVR.

YES NO Shall be DONE IN UPCOMING AOH

84 TONS HPS 220 GPS Time Synchronizer was not available. Yes No UPTO 2015-16 PROCUREMENT UNDER PROCESS.

85 TONS HPS 220 Sequence Event Recorder was not available. Yes No UPTO 2015-16 PROCUREMENT UNDER PROCESS.

86 TONS HPS 220 Disturbance Recorder was not available Yes No UPTO 2015-16 PROCUREMENT UNDER PROCESS.

87 TONS HPS 220 Diagnostic Station was not available. Yes No UPTO 2015-16 PROCUREMENT UNDER PROCESS.

88 TONS HPS 220The condition of emergency lighting at various floors and controllocations is poor.

Yes YES WORK COMPLETED.

89 STPS PH-I 220No GPS in control room and it is necessary for the root cause analysisof the disturbance occurred in the grid

Yes No NANOT APPLICABLE BECAUSE ALL 5 UNITS OFPH-I HAS ALREADY RETIRED.



(Category-A)


No.


ProtectionAudit

S/SVoltage


90 STPS PH-I 220In the protection scheme electromechnical and static relay are in usebut as per present grid norms avaliabilty of numerical relay is requiredfor fault analysis and event recorder.


91 STPS PH-I 220Fire protection system of transformers are out of order and suitabilityof nitrogen injection fire protection system may be explored.


92 STPS PH-II 220No GPS in control room and it is necessary for the root cause analysisof the disturbance occurred in the grid

Yes No 15-16TENDER FOR PROCUREMENT IS STARTEDAND ITS DUE DATE 30.08.14.

93 STPS PH-II 220Some of the cells of unit no.7 are bulged in plante type battery setwhich resulting in breaking of the container and lid therfore it shouldbe replaced at the earliest.

Yes Yes Yes No 15-16Order has been placed to M/S Exide indsutries videno. - 08-004/P&W/EMD-II/PE-297/PO-568/462dtd. 21.06.14

94 STPS PH-II 220Some of the cell are bypassed due to bulging problem thereby reducingthe available capacity of the bank.


95 STPS PH-II 220

Battery bank of unit 6& 7 were commissioned in the year 2004 & 2001respectively.As per CEA circular fair life of battery is 5 years onlytherefore suitable action for their replacement is to be initiated at theearliest.


96 STPS PH-II 220 No alarm for DC E/F is provided in the chargers. Yes Yes DONE DURING AOH OF UNITS

97 STPS PH-II 220Capacity test has not been conducted recommended to do onces in ayear.

Yes Yes Yes No JUNE'15ORDER PLACED TO M/S EXIDE INDUSTRIESAND IT WILL COMMISSION SHORTLY

98 STPS PH-II 220In the protection scheme electromechnical and static relay are in usebut as per present grid norms avaliabilty of numerical relay is requiredfor fault analysis and event recorder.

Yes No 15-16Order for numerical generator protection relay forunit no. 6 & unit no. 7 has been placed and itsshould be replaced shortly.

99 STPS PH-II 220 Pole slip protection is not available so it shall be provided. Yes No NOT APPLICABLE

100 STPS PH-II 220Auto reclosure/Disturbance Recorder/Event Logger/SER all are notavailable.

Yes No 15-16 PROCUREMENT INTIATED .

101 STPS PH-II 220 Carrier Protection is not available in 220 kV switchyard. Yes No 15-16 WILL BE DONE SHORTLY .

102 STPS PH-II 220 Earth Mettaling is not visible in 220 kV switchyard Yes No JUNE'15 WILL BE DONE SHORTLY .

103 STPS PH-II 220Mulsi Fire protection of the transformer is out of order, suitability ofNitrogen injection may be explored

Yes No JUNE'15 WILL BE DONE SHORTLY .

104 STPS PH-II 220Suitability of short circuit breaking capacity of circuit bkr & short timecurrent capacity of CT's shall be reviewed in respect of exsisting faultlevel's

Yes No JUNE'15 WILL BE DONE SHORTLY .

105 STPS PH-III 400 No gps in 400kv control room . Yes No FEB'15TENDER OPENED AND CASE IS UNDERPROCESS.

106 STPS PH-III 400

220 V DC battery source - 216 V Dc battery source of unit# 8 of1200ah capacity - It was commissioned in the year 2004. As per ceacircular the revised fair life is 5 years only. Suitable action for theirreplacement is to be initiated at the earliest.

Yes No

ACCORDING TO CE(Engg.) JABALPUR ASPER IEEE 450-1987,THE RECOMMENDPRACTICE TO REPLACE BATTERY IS BASEDON C-10 TEST AND NOT A TIME BOUNDAND C-10 TEST FOUND SATISFACTORILY INAUG-13 & THE SAME WILL BE



(Category-A)


No.


ProtectionAudit

S/SVoltage


107 STPS PH-III 400

220 V Dc battery source - 216 V DC battery source of unit# 9 of1200ah capacity - It was commissioned in the year 2004. As per ceacircular the revised fair life is 5 years only. Suitable action for theirreplacement is to be initiated at the earliest.

Yes No

ACCORDING TO CE(Engg.) JABALPUR ASPER IEEE 450-1987,THE RECOMMENDPRACTICE TO REPLACE BATTERY IS BASEDON C-10 TEST AND NOT A TIME BOUNDAND C-10 TEST FOUND SATISFACTORILY INAUG-13 & THE SAME WILL BE

108 STPS PH-III 400220 V DC battery source - 216 V DC battery source for station of1200ah capacity - It was commissioned in the year 2009. As per ceacircular the revised fair life in 5 years only.

Yes NoITS C-10 TEST DONE IN NEXT AVAILABLEOPPORTUNITY.

109 STPS PH-III 400ISP Feeder - Reverse zone is not provided is rel 521 relay. The zonecalculations may be revised.

Yes No JAN'15ENQUIRY ISSUED TO OEM FOR TESTINGAND REVIEW OF RELAY SEETING.OFFERSTILL AWAITED.

110 STPS PH-III 400ISP Feeder - Over voltage protection has not been enabled in rel521numerical relay.

Yes No JUNE'15

ENQUIRY ISSUED TO OEM FOR TESTINGAND REVIEW OF RELAY SEETING.OFFERSTILL AWAITED.OVERVOLTAGE SEETINGSTAGE-1 & STAGE-II HAVE BEEN PROVIDEDTHROUGH SEPARATE RXEG-21

111 STPS PH-III 400 Reactor - 63 MVARs bus reactor no. 1 is out since 24.05.2005. Yes No JUNE'15

LOI HAS BEEN ISSUED TO M/S ALSTOM T&DINDIA LTD VIDE 08-004/P&W/STPS/EMD-3/WT-329/TENDER-1077/LOA/1750DTD.03/11/14

112 STPS PH-III 400 Reactor - new reactor is available. it should be commissioned early. Yes No JUNE'15

LOI HAS BEEN ISSUED TO M/S ALSTOM T&DINDIA LTD VIDE 08-004/P&W/STPS/EMD-3/WT-329/TENDER-1077/LOA/1750DTD.03/11/15

113 STPS PH-III 400Fire protection of transformer - mulsifire type fire protection system isout of order.

Yes No FEB'15 WAITING FOR RECEIPT OF OFFER

114 STPS PH-III 400Fire protection of transformer - suitable of nitrogen injection fireprotection system may be explored.

Yes No FEB'15 WAITING FOR RECEIPT OF OFFER

115 BARGI HPS 132 DPR relay setting of the 132 KV Jabalpur 1, Jabalpur 2 andLakhnadon feeders to be reviewed

YES YES COMPLETED

116 BARGI HPS 132220 V DC system having positive earth fault and mixing of the DCsource 1 and 2 is observed. Periodical load test of the battery may beensured.

YES YESCOMPLETED

117 BARGI HPS 132 The 132 KV switchyard, Power House and equipment needs moreattention towards its up keeping.

YES YES COMPLETED

118 BARGI HPS 132 Records of the mock drill / trial of the fire fighting equipments and DGset are not available at Bargi Power Station.

YES YES COMPLETED

119 BARGI HPS 132

All Existing Electomechanical / Electostatic Relays to be replaced withnumerical relays.

YES NO UPTO 2015-16 Budgetary offer for replacing all electromechanicalrelay with Numerical Relay for supply withcomplete retrofitting job is being awaited.

120 BARGI HPS 132Fire Fighting system with CO2 Cylinders are available at power stationbut it is observed that it is in the mannual mode. It may be in the automode.

YES NO UPTO 2014-15 The case of repairing and upgrading of CO2 systemis under process.

121 BARGI HPS 132The Facility of DR/ SER is not available at the HPS Bargi. YES NO UPTO 2015-16 The facility of DR/SER is provided in the offer of

M/s ABB for retrofitting of numerical relay panelwhich is in the process.

122 BARGI HPS 132 GPS Facilities is not available. YES NO UPTO 2015-16 Preparation of Technical specification is underprogress.



(Category-A)


No.


ProtectionAudit

S/SVoltage


123 BARGI HPS 132132 KV MOCB installed on 132 KV Jabalpur-1, Jabalpur-2,Lakhnadon, bus coupler bay and 20MVA transformer to be replacedwith SF6 Circuit Breaker.

YES NO UPTO 2015-16 Budegtary offer for procurement of 132 KV SF6breaker from M/s Crompton Greaves, ABB ,Siemens etc. are awaited.

124 BARGI HPS 132

LBB Relay not provided on the 132 KV Jabalpur-1, Jabalpur-2 ,Lakhnadon Feeders.

YES NO 2015-16 Provision for LBB relay on 132KV JBP-1, JBP-2,LKD feeders is being incorporated in freshprocurement case of numerical relays and shall becommissioned in future.

125 BARGI HPS 132 132 KV R phase CT of Bus Coupler (Bus-I) is not available. YES NO It is not requiredas per power house

CT WILL BE COMMISSIONED SHORTLY ASPER AVALIABILTY AND SHUNTDOWN.

126 BARGI HPS 132Bus Bar Protection is not in service. YES NO NA PROCUREMENT OF BUS BAR PROTECTION

IS UNDER PROCESS AND AT PRESENTBUDGETARY OFFER IS ASKED FROM FIRM.

127GANDHISAGAR HPS

132 Carrier System is use for communication only, no carrier protection isprovided.

NA

128GANDHISAGAR HPS

132

Positive side of 220 V DC sources - 1 is found earthed (Voltagebetween positive to earth is Zero and negative to earth is 240 V) Pointat which DC leakage / earthling have developed may be detected andrectified at the eariliest.

YES YES

COMPLETED

129GANDHISAGAR HPS

132 220 V Battery charger - 2 and Battery set - 2 is very old and underreplacement.

YES YES COMPLETED

130GANDHISAGAR HPS

132 Synchronizing trolley is available and working properly. YES YES COMPLETED

131GANDHISAGAR HPS

132 CTs star point earthling of 132 KV are checked and found no multipleearthlings in the system.

YES YES COMPLETED

132GANDHISAGAR HPS

132Height of Live conductor in HV section from CB to wave trap in 132KV Manasa bay is seams to be very less. Sufficient Ground clearancemay be maintained for safety purpose.

YES YESCOMPLETED

133GANDHISAGAR HPS

132Operation of DG set is available in manual mode. Provision for automode operation may be provided so that DG set starts automatically inblack - cut condition/exigency.

YES NO UPTO 2015-16BUDGETARY OFFER IS BEING OBTAINED.

134GANDHISAGAR HPS

132 Auto Check synchronizing facility is not available, which should beprovided for betterment of system.

YES NO 2015-2016 BUDGETARY OFFER IS BEING OBTAINED.

135GANDHISAGAR HPS

132 Testing of DPR, Differential and other Relays. Along withcorresponding CT & PT should be carried out in regular interval.

YES YES NA NA NA NA -

136GANDHISAGAR HPS

132 DRs, SERs are not available for recording of system disturbances. YES NO UPTO 2015-16 PROCUREMENT BEING CARRIED OUT

137GANDHISAGAR HPS

132 Back up O/c - E/F relays are not provided for all GeneratorTransformer. It should be provided at the earliest.

YES NO UPTO 2015-16 BUDGETARY OFFER IS BEING OBTAINED.

138GANDHISAGAR HPS

132

Almost all the relays provided for Generator, Generator Transformer(GT), Station Transformer of 20 MVA are electromagnetic type. Theseexisting relay should be replaced with numerical relays for betterreliability, sensitivity, faster response and compatibility with GPSsystem.

YES NO UPTO 2015-16

BUDGETARY OFFER IS BEING OBTAINED.

139GANDHISAGAR HPS

132

Almost all relays (Distance protection, O/c, E/F relays) provided for132 KV Feeders are electromagnetic type and required to be replacedby numerical relay for better reliability, sensitivity, faster response andcomptibility with GPS system.

YES NO UPTO 2015-16

BUDGETARY OFFER IS BEING OBTAINED.



(Category-A)


No.


ProtectionAudit

S/SVoltage


140ISP HPS,NHDC

400Time delay setting for Zone-3 is given as 500ms, which is very lowand it should be revised as per CBIP recommendation or in co-ordination with MPPTCL setting for Zone-3 that is 700ms.

YES YES Non Applicable NA NA NATime delay settings changed from 500ms to 700mson 20.09.2013.

141ISP HPS,NHDC

400Thermovision survey/thermal scanning is being done annually, itshould be done monthly.

YES YES Non Applicable NA NA NA Thermovision scanning is being done regularly

142ISP HPS,NHDC

400As per latest guidelines Directional Earth fault Protection is to beprovided on 400 KV lines .It can be provided through existingnumerical DPRs. It is suggested to provide the same

YES YES Non Applicable NA NA NA

Matter is under communication with other endsubstations and their suggestion are sought for thesettings for directional E/F protections .Reply isstill awaited

143ISP HPS,NHDC

400PartialDC leakage observed in battery sets of power plant . It issuggested to rectify the same

YES YES Non Applicable NA NA NA Problem rectifiied

144ISP HPS,NHDC

400

In general voltages observed around 420KV to 430KV whengenerating machines are off. Therefore to control overall high voltageproblem it is suggested to provide either 2x50 MVAr shunt reactors on400KV Bus at ISP or 50 MVAr line reactors should be provided on400KV ISP-Sarni (200 Kms) line and on 400KV ISP-Nagda (189Kms) line on both the ends.

NA NA NA

YES YES 2015 Case for installation of 125MVAr Bus reactor isunder pre tendering stage .

145ISP HPS,NHDC

400

On observation of higher voltages on R-phase of 400 KV Sarni circuit,as a precautionary measure it is suggested to replace the R-phase CVTof Sarani circuit by spare CVT available at site to eliminate thepossibility of equipment error.

YES YES Non Applicable

NA NA NA

CVT of R-phase of ISP-Sarni feeder at ISP endreplaced by spare CVT on 06.06.2013.

146ISP HPS,NHDC

400

Battery Capacity test carried out by keeping battery charger off for1hour, a voltage drop of 6percent observed . Three battery sets werecommisioned in 2003 and have completed almost 10 years . Furthersuitability of these battery sets should be confirmed by consultingmanufacturere and bt conducting long duration/high current dischargecapacity test

YES YES Under Process

NA NA NA

The complete Battery bank wrere overhauled in2010 -11by the manufacturer and it gauaranteedthe battery life for anothrer five years. Matter ofconducting long duration /high current dischargecapacity test is under process

147ISP HPS,NHDC

400Tandelta and capacitance test of tranformer bushings is being doneonce in three year .It should be done once in a year

YES YESNA NA NA

Matter is taken up with the manufacturer . Reply isawaited. Action shall be taken up accordingly onreciept of OEM reply

148OmkareshwarPower Station

220 Auto reclosing of all the 220KV Lines are disabledM/s Voith Hydro & M/s ABB Ltd. has intimatedthat our system is not designed for auto reclosingoperation due to generator constant.


220Only Stage-1 overvoltage protection (110%-5 sec) is only provided,however whereas two stages of overvoltage protection is recommendedby CBIP

As discussed with CPRI, Bangalore that Overvoltage Stage-2 in line relay REL 511 is notneeded. Over voltage Stage-2 in line relay REL 316is sufficient.


220Line protection Main -1 & Main-2 are having distance protection.Insuch cases CBIP recommends for additional directional IDMT EarthFault Relay

Yes

The Definite type of Directional Earth faultprotection function is configured in the relay REL511 and is in service.However,the case forreplacement of existing REL316 relay into REL670or equivalent is in progress.


220Generator Protection back up Impedance Protection is provided withtime delay of 3 sec, whereas,it is recommended the same may be 2 secmaximum

Complied


220 Most of the protection relays needed to be tested regularly Complied



(Category-A)


No.


ProtectionAudit

S/SVoltage


153Jaypee BinaThermalPower Plant

400 1)UAT 1&2 for unit 1 still not commissioned Yes Yes NA NA NA NAUAT 1&2 for unit 1 commissioned

(Complied)

Jaypee BinaThermalPower Plant

400 2) GPS system not commissioned Yes Yes NA NA NA NAGPS system of whole station commissioned

(Complied)


4003) 2no. Of High Mast tower installed near 400KV transfer bus in theswitchyard

Yes YES NA NA NA NA Two no high mast has been erected at the corner of

s/s ( Complied)

Jaypee BinaThermal

400 4)DR&ER is provided in SCADA system. Yes yes NA NA NA NA It is available in our SCADA system (Complied)

Jaypee BinaThermal

4005)Battery cell voltage need to be recorded with respective charger inOFF condition.

Yes yes NA NA NA NABattery cell voltage is now being recorded

respective to charger in off condition. (Complied)


4006)Directinal E/F relay setting 1 sec. for PGCIL 1.2 Sec.for MPPTCLline is provided .This is on higher side,to be reviewed& revise

Yes

Commentsfrom ourconsultantM/S TCEis given

NA NA NA NA

Answer from our consultant M/S TCE :Directional e/f is provided to protect the system

from high impedance line faults where faultcurrents are low. So 1 sec operating time is

sufficient and can be used for both the lines.Decrease in the operating time may cause it to

interfere with 3rd zone time settings.


4007)Over voltage satting for 400kv PGCIL&MPPTCL line are not as perCBIP recomendetion(CBIP REV 274).

Yes


NA NA NA NA

Our consultant TCE's reply :Please note that aninstantaneous overvoltage setting of 130% phase tophase can be used. As per standard practice lines

are capable of withstanding 150% of highestsystem voltage at power frequency for 1 minute. Soabove settings are ok. (Setting is in


4008)GT&ST fifth harmonics blocking is done for 20%. This may bestudies & revised.

Yes


NA NA NA NA

Reply from consultant TCE ;As perrecommendation from relay manuals, setting of 15to 30 % is used for fifth harmonic blocking. As perour standard 20% is used fifth harmonic blocking.

(Setting is in order. Hence complied)


4009)It is observed that for ganretor protection under frequency relay tripsetting 48.5Hz for 5sec.& over frequency relay trip setting 51.0Hz for5sec. Is taken,the same may be reviewed.

Yes

Commentsfrom ourconsultantM/S TCE

NA NA NA NA

OUR consultant reply Frequency protection isused mainly for alarm and as per our practice a

time delay of 5 sec is adequate.(Setting is in order. Hence complied)


40010)In turn protection has not been provided,through it is recommendedfor Generatormore than 100 MVA.

Yes

Commentsfrom ourconsultantM/S TCE

NA NA NA NA

Our consultant TCE's reply ;As per our standardpractice, inter-turn protection is provided only

when specifically recommended by themanufacturer.(It is in order. Hence complied)


400 11)Periodical testing of relays & yard equipment must be done. Yes NA NA NAPeriodical testing of relay & yard equipments - itwill be adhive too. (Planned for the Shutdown of

the Unit.Hence complied)

154

Name of Utility

Name of S/Sidentified forprotection Audit

S/Svoltage(kV)

Name of ThirdPartyProtectionAudit Agency

Date onwhich AuditConducted Observations of protection Audit

Yes/No


If notattended,reason

Yes/No WhetherattendedYes/No

If notattended, reason

Seoni 765 PGCIL WR-II,WRLDC

12.01.13 NIL NA NA NA NA NA NA NA

Wardha 765 MSETCL,WRLDC

17.04.13 For any modified relay settingsrevision received from corporate/ RHQ should be maintained inseparate register.

Yes Yes NA NA NA NA NA Attended

Bilaspur 765 MPEB, WRLDC 15.04.13220 V Battery Charger Voltage onhigher side. Yes Yes NA NA NA NA NA Attended

Pune 400 PGCIL WR-II,WRLDC

28.01.13400Kv Main-II Busbar protectionout of service. Yes Yes NA NA NA NA NA

Solapur 400 MSETCL,WRLDC


Parli 400MSETCL,WRLD

C 16.04.13 Broken conductor alarm may beadopted in MSETCL Parli lines.


Bhadrawati 400 PGCIL WR-II,WRLDC


Bhatapara 400 PGCIL WR-II,WRLDC

04.02.131 nos. Display of REL 670 notworking Yes Yes NA NA NA NA NA Attended

Raigarh 400 PGCIL ER-II,WRLDC

07.12.12

a)390 KV LA of Bus Reactor to bereplaced by 336KV.b)Repairs of NRV of Jockey pumpcarried out.


Mapusa 400 MSETCL,WRLDC


Boisar 400 PGCIL WR-II,WRLDC


Raipur 400PGCIL WR-II,

WRLDC 06.02.13

a)Some of ICT/Reactor protectionare staic type may be replaced byNumerical relay. b)In 400KVWardha-1 & 2 Main2 relay T-cordtime found 0.04sec and reversezone time found 1.0 sec.


FORMAT FOR PROTECTION AUDIT DEFICIENCIES/OBSERVATIONS COMPLIANCE Power Grid Corporation of India Ltd., Region -WR-I

Deficiencies that can becorrected without

procuremnet (Category A)

Deficiencies that can becorrected with procuremnet

(Category B)If not

tentativedate for

protectionaudit

Remarks

Summary Sheet of Protection Audit from WRTS II

Voltage Level Total no of S/s in Region - (A)Target Date of Completionof audit (D)

No of S/s where deficienciesdetected (E)

132kVwhereverapplicable220kV400kV 11 All completed 1

765kV 3 All completed 3HVDC S/sTotal 14 All completed 4

No of S/starget date of removal ofdeficiencies

No of S/starget date ofremoval ofdeficiencies

132kVwhereverapplicable

220kV

400kV

1. Shujalpur S/S - Rectification ofDG Set Auto Starting completed2. Dehgam S/s: - Non working ofMain II Relay of Ranchodpura 2Line of GETCO and Non TimeSynchronisation of Relays of allthe GETCO Lines

2

1. Shujalpur S/S -Rectification completed2. Dehgam S/s: - Nonworking of Relay ofRanchodpura has beenresolved. Non timesynchronisation issuetaken up with M/s GETCO

765kV

1. Bina S/s: - Earth Resistancewas measured during PeakSummer as mentioned in theProtection Audit Report2. Satna S/s: - DG Set Auto Startproblem has been rectified3. Gwalior S/s: - Commissioningof PLCC in 220kV Lines has beentaken up with M/s MPPTCL

3

1. For Satna & Bina S/s: -Matter resolved2. For Gwalior S/s: - PLCChas been commissionedby MPPTCL

HVDC S/s

Total ---

11 All completed

No of S/s identifiied for Protection Audit (B) No of S/s yet to be audited (C)

Not Applicable

Not Applicable

Voltage Level

Action Plan (on observation ofthird party protection audit)finaliztion date / target date forfinalizing plan (F)

Detail of S/s where no procurement isrequired for removal of deficiencies (G)

Detail of S/s whereprocurement is required (H) Reason / Remraks for

rectification of deficienciesrequiring period of morethan one year (I)

5 Not Applicable

3 All completedNot Applicable

14 All completed

Cost estimates for removal ofdeficiencies (J)

Not Applicable

Not Applicable

Not Applicable

Not Applicable

of 2

Name of the Organization: NTPC Limited-WR stations

Sr.No Deficiency Observed during BasicProtection Audit

Action taken / proposed to betaken

TimeSchedule

Name of the Sub-station / Switchyard: Vindhyachal STPP

1. Replacement of balance Staticdistance protection relays, withNumerical relays, in line withGazette notification of GOI for 400kV Satna 1 & 2 lines.

Completed Complied-Bcategory

2. 63 MVAR Bus reactor needs to betaken into service.

Put in service Complied-Bcategory

3. Main-I and Main-II Distanceprotection Schemes for all feedersneed to be different make/characteristic for 400 kV Sasan,Mahan, and Satna-III & IV lines.

Being adopted. Complied-Bcategory

4. Earth fault in 220 V switchyard DCsystem to be attended.

Ongoing routine activity Complied-Acategory

Name of the Sub-station / Switchyard: Korba STPP

1. Over voltage relay: Drop off to Pick upratio is not explicitly available inMicom relays.

Minimum Drop off / pick up ratioof 95% is available in MiComrelay and it is in order as far asover voltage protection isconcerned. With a very highreset/operate ratio, chatteringphenomena may be observed inrelay.

Complied-Acategory

2. Power swing blocking is enabled forZ2, Z3 and Z4. However de-blockingtimer is set at 2 sec. The same maybe reviewed.

Power swing blocking logic has tobe universally decided across thegrid. De-block timer of 2 sec hasbeen adopted in all NTPCstations and is in line with NRPC /ERPC recommended settingguideline.

Complied-Acategory

3. Auto re-close relay reclaim timer notuniform for all lines. Stage-I lines ishaving 10 secs and the same is 25secs for stage-II lines. This may bereviewed.

Reclaim time of 25secs to beadopted for all lines as per NTPCpractice.

Complied-Acategory

of 2

Sr.No Deficiency Observed during BasicProtection Audit

Action taken / proposed to betaken

TimeSchedule

4. Zone 2 time delay is different fordifferent lines (300ms and 400ms).The same may be reviewed.

As per NTPC practice, Zone-2time delay of 400ms is beingadopted & it is 500ms in case oflong lines followed by short lines.The same to be adopted.

Complied-Acategory

Name of the Sub-station / Switchyard: Sipat STPP

1. Time Synchronization: All numericalrelays except 5 nos relays of 765KVand 4 nos of relays of 400KV are timesynchronized.

Taken up with OEM. Only 01relay could be synchronized withGPS successfully.

Complied-Bcategory

2. Time setting of both Stage-I andStage-2 are same in all 765KV and400KV LBB relays.

The setting has been reviewedand found in order.

Complied-Acategory

3. Over voltage relay: Drop off to Pick upratio is not explicitly available inMicom relays.

Minimum Drop off / pick up ratioof 95% is available in MiComrelay and it is in order as far asover voltage protection isconcerned. With a very highreset/operate ratio, chatteringphenomena may be observed inrelay.

Complied-Acategory

4. Power swing blocking is enabled forZ2, Z3 and Z4. However de-blockingtimer is set at 2 sec. The same maybe reviewed.

Power swing blocking logic has tobe universally decided across thegrid. De-block timer of 2 sec hasbeen adopted in all NTPCstations and is in line with NRPC /ERPC recommended settingguideline.

Complied-Acategory

Name of the Sub-station / Switchyard: Jhanor Gandhar GPS

1. Replacement of existing static relaysfor line protection with Numericaldistance relays.

PO placed. Complied-Bcategory

~~m~~wrpc.gov.in/pcm/pa_cerc_q4_31122014.pdf · 3 vasai 220 the 100kv busbar protection scheme is...

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mwrpc.gov.in/pcm/pa_cerc_q4_31122014.pdf · 3 vasai 220 the 100kv busbar protection scheme is...