SOUTHERN REGIONAL POWER COMMITTEE · Logic for 765 KV Sholapur Raichur Line MW for 10 sec) in 765kV Operation o f Over current protection (800 A or 1000 Sholapur-Raichur line (Import

SOUTHERN REGIONAL POWER COMMITTEE BANGALORE

Agenda for the 29th Meeting of Protection Coordination Sub-Committee

of SRPC to be held on 20.02.2014 (Thursday)

1. Confirmation of the Minutes of the 28th Protection Coordination Sub-Committee meeting held on 24th January , 2014

2. Details of Grid Disturbances & Major Grid Incidences

It is requested that the constituents may send the Report / Analysis of the Grid disturbance/ Major Incidence within 24 hours of the occurrence to SRLDC and SRPC Secretariat.

3. Grid Occurrences in the Southern Region

It is requested that the detailed Report of the Grid occurrence may please be Uploaded in the SRLDC website within the time schedule as stipulated in

IEGC.

4. CERC Order dated 19.12.13 in respect of Petition No.

263/MP/2012.

APTRANSCO,KPTCL, KSEB ,Puducherry and TANTRANSCO are requested

to send the status of implementation/ action taken for implementing the

Hon'ble CERC order dated 19.12.2013 in respect of Petition

No.263/MP/2012.

5. Status of Pending Protection issues

Status of the following pending protection issues may be informed to the PCSC forum latest by 14.02.2014.

a. Status of Recommendations of the 27th PCSC

With respect to Grid Disturbance that occurred at Kothagudam

TPS and Khammam S/S on 25.09.2013

Agenda for the 29th Protection Coordination Sub Committee Meeting to be held on 20.02.2014 Page 2

SN

Recommendation The meeting in which the issue was Discussed

Anticipated date of completion

Agency Status Remarks

1 a. APGENCO to consider usage of relays of different make for Main –I and Main II distance protection for KPTS- Managuru line-2. Relevant APTRANSCO c.APTRANSCO to review distance protection settings of KPTS- Managuru line-2 as it tripped for fault in KPTS- Managuru line-1. d.APGENCO to review reverse distance protection settings of KPTS- Shapurnagar Line. e. APGENCO to enable DEF Back Up protection in all lines emanating from KTPS. f. APGENCO to enable IDMT characteristics for GTs and ICTs at KTPS which is to be coordinated with primary protection. g. APGENCO to review the Overload settings of Unit 4 h .DR at Khammam Substation to be time synchronized with GPS i. APGENCO to review bus bar protection settings.

27th PCSC

Yet To be reported

APTRANSCO/APGENCO

Pending

APTRANSCO / APGENCO to send the status of implementation

b. Recommendations to be complied by November 2013

SN




1 DTOC settings for ICTs to be removed and IDMT settings to be adopted.

21st PCSC (25.06.2013)

Nov-13 SRTS I, PGCIL

- SRTS I, PGCIL yet to report to the PCSC forum.

2 Main2 distance protection for EMPC#1 feeder not available - Edamon

17th PCSC (26.02.2013 )

Nov-13 KSEB - KSEB to update the status


3 LBB not in service for SBEM 2, 3 and EMPC #1- Edamon

17th PCSC (26.02.2013 )

Nov-13 KSEB - KSEB to update the status

c. Recommendation to be complied by December 2013

SN




1 NPCIL,KPCL and KPTCL in coordination to review the protection settings at Kaiga Corridor

24th PCSC (26.09.2013 )

Dec-13 NPCIL, KPCL

NPCIL,KPCL Pending

Compliance of KPCL, Kaiga, and NPCIL is yet to be reported to the SRPC Secretariat.

d. Recommendations to be complied by January- 2014

SN




1 BUSBAR PROTECTION AT KAYATAR 110KV SUBSTATION

21st PCSC held on 25.06.2013

Jan-14 TANTRANSCO

Pending

TANTRANSCO informed that the protection issue would be sorted within the agreed time.

2 PROVIDING DR AND EL-MAMIDAPALY

23rd PCSC held on 27.08.2013

Jan-14 APTRANSCO

Pending

-

e. Recommendations to be complied by March 2014

SN Recommendation The meeting in which the issue was Discussed



1 DG set at Edamon 17th PCSC (26.02.2013 )

Mar-14 KSEB Pending

KSEB informed that the protection issue would be completed by Mar-2014.

2 Bus Bar protection Scheme at Ragalapadu Substation

26th PCSC (21.11.2013)

Mar-14 APTRANSCO

pending

-


f. Recommendations to be complied by May - 2014




1 48 V DC SUPPLY REDUNDANCY NOT AVAILABLE-EDAMON

17th PCSC (26.02.2013 )

May-14 KSEB Pending

KSEB informed that the protection issue would be sorted within the agreed time.

2 EARTH PITS at EDAMON

17th PCSC (26.02.2013 )

May-14 KSEB Pending


g. Recommendation to be complied by June - 2014

SN




1 The Main I and Main II Protection of Different make-Sharavathy


June-14 KPCL Pending

Relays for M1 & M2 protection to be of different make: NIT has been issued and would be processed.

h. Recommendations to be complied by Aug 2014




1 Synchronizing Facility at Hubli.

17th PCSC (26.02.2013 )

Aug-14 KPTCL Pending

KPTCL informed that the protection issue would be sorted within the agreed time.

i. Recommendations to be complied by Sep - 2014

SN Recommendation The

meeting in which the issue was Discussed



1 Replacement of OLD CBs at Sharavathy


Sep-14 KPCL Pending

NIT has been issued and would be processed.


2 COMPLIANACE OF 3RD PARTY AUDIT REPORT-Sharavathy

17th PCSC -25th PCSC (26.02.2013 to 22.10.2013)

Sep-14 KPCL Pending

NIT has been issued and it would be processed

j. Recommendations to be complied by Nov 2014

SN




1 •As the Plant was more than 25 years old, all yard equipment need to be replaced. •Modification of Bus Scheme to be carried out. •The PCSC forum recommended for the modification of Bus Bar protection scheme at Idukki Substation. In the event of bus fault the entire substation should not be affected. This would improve the reliability and security of the Idukki Hydro Generating station.

26th

PCSC

Nov-14 KSEB Pending

KSEB informed that the protection issues

would be addressed by Nov 2014.

k. Recommendation to be complied by Dec 2014

SN




1 ONLY ONE BUS IS AVAILABLE, TRANSFER BUS SHALL BE PROVIDED -EDAMON

17th PCSC (26.02.2013 )

Dec-14 KSEB Pending



5. Remedial measures taken for critical tripping events

The respective constituents are requested to send the remedial measures

taken by them for the tripping events enclosed in the Annexure – I through

email latest by 07.02.2014.

6. SPS for Kudankulam Nuclear Power Station SRLDC brought to the notice of the PCSC forum that there had been re-orientation recently in respect of 400 KV lines emanating from Kudankulam. Three 400kV lines were now from Kudankulam to Thirunelveli while remaining one line is from Kudankulam to Madurai. Hence the following logic was proposed for SPS at Kudankulam on account of the change in the configuration:

Contingency Action

Tripping of all three lines from Kudankulam to Thirunelveli and two units in running condition at Kudankulam.

One unit at Kudankulam to go on house load and the second unit generation would be evacuated through 400kV Kudankulam-Madurai line.

28th PCSC Deliberations

Ø SRLDC informed the forum that PGCIL had furnished its response to the issues raised by NPCIL. It had asked KKNPP to restrict the generation to House Load on a Generator and 700 MW on other Generator.

Ø KKNPP, NPCIL informed that they would revert back within three week's time.

NPCIL to inform the status.

7. Phasing of Implementation of Protection Audit Recommendations

• In the 23rd SRPC meeting held on 26th October 2013m, it was agreed that the utilities to carry out implementation of the recommendations relating to third party protection audit as per prioritization in a phased manner.

• The schedule of activities would be furnished with in one month and would be discussed in the Protection sub committee meeting.

• The utilities would commence works identified in the above schedule


without waiting for funding.

• SRLDC had also submitted its recommendations regarding phasing of works to Hon’ble CERC. Action by: TANTRANSCO, KPTCL, and Puducherry

8. Tripping Incidents in the Southern Region The tripping details that had occurred in the Southern Region during the month of January , 2014 is enclosed as Annexure - II .The Constituents were requested to update the details in the SRLDC Website at the earliest to analyze the incidents and suggest remedial measures if any.

9. Status of implementation: SPS in Southern Region

SN

Name of the Scheme Details of the scheme

Implementing Agency

Status Remarks

1 Additional Logic for 765 KV Sholapur Raichur Line

Operation of Over current

protection (800 A or 1000

MW for 10 sec) in 765kV

Sholapur-Raichur line (Import

by SR) and

frequency <50.1 Hz

SRTS I,PGCIL

SRTS I to update the status.

The PCSC forum recommended for implementation of additional Logic for the SPS for 765 KV Sholapur Raichur Line w.e.f 27.01.2014.

2 Modification in NTPC Talcher SPS

NLDC has proposed for modification in the SPS for secure operation of Grid after synchronization of SR with NEW Grid.

NTPC/CTU in consultation with NLDC and SRLDC

- -

10. Status of implementation: SPS in Karnataka

SN

Name of the Scheme

Details of the scheme Implementing Agency

Status Remarks

1 Somanahally& Bangalore water supply

a) To trip all 220kV lines & 220 / 66kV trfs except 220 kV Harohalli & Tataguni lines at Somanahally and to trip Vrishabhavathi line at Tataguni when ICTs at Somanahally trip. b) To trip 220 kV Vajamangala and Madhuvanahally-1 & 2 lines at TK Hally when ICTs at Mysore trip.

KPTCL

KPTCL informed that the SPS is delayed due to ongoing R&M works at 220 KV Somanahalli SS.

KPTCL to submit the SPS Logic to the SRPC Secretariat.

2 (i) SPS for Tripping of one of 400 KV

In SR signal will be sent from Hiriyur to trigger 765 KV Raichur Sholapur SPS.500

KPTCL/ PGCIL

(i) KPTCL informed that action would

-


Hiriyur Nelamangala D/C Line and flow on other line >850 MW (ii) SPS for tripping one of 400 KV Gooty Nelamangala S/C Line or 400 KV Gooty Somanahalli S/C Line and flow on the other line > 850 MW.

MW of additional loads in Southern Region to be identified which is separate from the loads identified for HVDC Kolar SPS and Kudankulam SPS.

be taken for identification of separate loads for the proposed SPS based on the recommendations of PCSC forum.

11. Implementation of Islanding schemes in SR

Mock testing of Islanding scheme – constituents may discuss.

12. Mapping of AUFR, df/dt, SPS in the SCADA of SLDC/SRLDC. The issue may be discussed

13. Protection Logic checking of Critical Substations Logic checking of following Critical Substations in the Southern Region had been approved in the SRPC meeting held on 18.05.2013 at Bangalore.

(i) 400 kV Guttur (vi) 400 kV Kurnool

(ii) 400 kV Ramagundam (vii) 400 kV Almatti

(iii) 400 kV Kalpaka (viii) 220 kV Edamon

(iv) 400 kV Nelamangala (ix) 400 kV VTS

(v) 400 kV Hoody (x) 400 kV Vemagiri

14. Implementation of recommendations of Enquiry Committee (NEW grid disturbance on 30th & 31st July, 2012)

(a) Healthiness of Batteries

Healthiness of Batteries Installed at 220 KV and above voltage level Substations (to provide Backup supply to the Relays, RTUs and Communication Equipments) may be updated on monthly basis since the same has to be communicated to CEA/MOP.

• The constituents were requested to submit the healthiness of batteries on monthly basis (i.e. on 7th day of the month).


• The following constituents are requested to send the report regularly

APGENCO,KPCL,KPTCL,SRTSI (PGCIL) , NPCIL, Puducherry, JSWEL, UPCL

• The status of submission by the constituents is enclosed herewith as Annexure – III.

• The following constituents are requested to send the consolidated list of Batteries installed in the system (Substation wise) as a onetime report.

APGENCO,APTRANSCO,KPCL,KPTCL,SRTS I (PGCIL),

NPCIL, Puducherry, JSWEL, UPCL

15. Submission of completed dynamic study data All SLDCs were requested to direct the embedded IPPs connected at 220 kV and above voltage level to submit completed dynamic study format to SRPC, Secretariat.

16. Informing configuration changes to PCSC forum It was agreed in the PCSC forum that if any change in the system configuration ( i.e. addition of Generating Units, Capacitors, Reactors, LILO etc) are to be highlighted and brought to attention of PCSC forum during the PCSC Meetings . This would enable utilities to review their protection settings if any change in the adjoining utilities to have better protection coordination in the Southern Region. All the constituents are requested to send the change in the configuration in their system if any to the PCSC forum on monthly basis.

17. Sending Agenda items for the PCSC meetings

As per the Guidelines of CEA/MOP it had been decided to conduct the PCSC meetings on a monthly basis .It is requested that Agenda Items for the PCSC meetings, if any, may please be sent latest by 5th working day of the month to SRPC Secretariat to compile and circulate the same so as to have fruitful discussions in the PCSC meetings.

18. Date & Venue of the next Meeting The 30th PCSC meeting would be conducted on 19.03.2014 (Wednesday) at SRPC Bangalore.

*******

ANNEXURE I

1

SRPC, Bangalore

Status of Remedial Measures for the Pending Critical Trippings Reports as on 04.02.2014 (Excluding O/V trips)

Status of Earlier Trips SN Element Name Outage

date/time Revival date/time

Reason for Outage Remedial Measure

1 HVDC BHADRAVATHI POLE 1 09-11-2013/ 14:50:00

09-11-2013/ 15:00:00

AUX. POWER SUPPLY FAILURE To-be-discussed


22-11-2013/ 15:39:00

DUE TO PROBLEM IN THE SOFTWARE OF POLE CONTROL SYSTEM

To-be-discussed


07-01-2014/ 22:32:00

DUE TO FILTERS TRIPPING ON SOUTH SIDE

To-be-discussed


07-01-2014/ 22:32:00

DUE TO FILTERS TRIPPING ON SOUTH SIDE

To-be-discussed

5 400 kV VIJAYAWADA - VTPS IV 2 15-01-2014/ 02:09:00

15-01-2014/ 03:36:00

REASON AWAITED To-be-discussed

6 400 Kv GOOTY - NPS 1 15-01-2014/ 12:29:00

15-01-2014/ 17:40:00

R - N FAULT To-be-discussed

7 400 kV VIJAYAWADA - VTPS IV 2 15-01-2014/ 18:42:00

15-01-2014/ 19:01:00

PLCC MAL OPERATION To-be-discussed

8 220 kV SABARIGIRI - THENI 20-01-2014/ 12:39:00

20-01-2014/ 13:01:00

DISTANCE PROTECTION OPERATED To-be-discussed

9 400 kV NELLORE - ALAMATHI 20-01-2014/ 18:03:00

20-01-2014/ 22:32:00

Y-PH LA FAILURE AT NLR END To-be-discussed

ANNEXURE I

2

10 400/220 kV ICT-2 AT CHITTOOR 24-01-2014/ 12:40:00

24-01-2014/ 13:10:00

FOREIGN MATERIAL FALLEN ON ICT To-be-discussed

11 400 kV MAHABOOB NAGAR - RAICHUR 24-01-2014/ 18:06:00

24-01-2014/ 18:31:00

PLCC MALOPERATION To-be-discussed

12 400 kV NELLORE - ALAMATHI 25-01-2014/ 18:27:00

25-01-2014/ 22:55:00

B PHASE LA FAILED AT NELLORE To-be-discussed

13 220 kV KAIGA - KODASALLY 25-01-2014/ 23:55:00

26-01-2014/ 01:06:00

TRIPPED ON EARTH FAULT To-be-discussed

14 220 kV KAIGA - KADRA 1 26-01-2014/ 00:44:00

26-01-2014/ 01:03:00

TRIPPED ON BACKUP OVER CURRENT PROTECTION

To-be-discussed

15 400 Kv TRICHUR - PALLAKAD 2 29-01-2014/ 14:29:00

29-01-2014/ 15:32:00

TRIPPED ON R-B FAULT To-be-discussed

16 400 Kv RTPS - BTPS 29-01-2014/ 18:12:00

29-01-2014/ 19:28:00

DISTANCE PROTECTION OPERATED To-be-discussed

ANNEXURE III

1

As on 04.02.2014 the status of Healthiness of Batteries as submitted by the constituents.

S.No Constituent

Healthiness of Batteries Consolidated List of Batteries Installed in

the System

Remarks

Oct- 2013 Nov-2013

Dec-2013

1 APTRANSCO Reported Healthy

Reported Healthy

Yet to report Yet to report APTRANSCO Is requested to send the consolidated List of Batteries installed in their system (Substation wise) –one time report.

2 APGENCO Yet to Report Yet to Report Partly Submitted

Yet to report APGENCO is requested to to send the report on monthly basis (i.e on 7th of every month)Consolidated (For Thermal & hydro stations) .

3 KSEB Reported Healthy

Reported Healthy*

Yet to Report Reported *Among the 76 Battery Banks 20 were reported not healthy. They were in the process of replacing them in stages.

4 KPTCL Yet to Report Yet to Report Yet to Report Yet to Report KPTCL is requested to

to send the report on monthly basis (i.e on 7th of every month)

5 KPCL Yet to Report Yet to Report Yet to Report Yet to Report KPCL


6 TANTRANSCO Reported Healthy

Reported Healthy

Reported Healthy

Reported

7 SRTS I,PGCIL Reported Healthy

Yet to Report Yet to Report Yet to Report SRTS I ,PGCIL Is requested to send the consolidated List of Batteries installed in their system( Substation wise )–one time report.

8 SRTS II,PGCIL Reported Healthy

Reported Healthy

Reported Healthy

Reported

ANNEXURE III

2

9 NTPC, Ramagundam Reported Healthy

Reported Healthy

Reported Healthy -

Reported

10 NTPC, Simadhri Reported Healthy

Reported Healthy

Reported Healthy

Reported

11 NTPC, Kayankulam Reported Healthy

Reported Healthy

Reported Healthy -

Reported

12 NLC - Reported

Healthy Yet to Report Reported NLC


13 MAPS,NPCIL - Reported Healthy

Yet to Report Reported MAPS to send the report on monthly basis (i.e on 7th of every month)

14 KAIGA,NPCIL Reported Healthy

Yet to Report Yet to Report Yet to Report KAIGA,NPCIL Is requested to send the consolidated List of Batteries installed in their system( Substation wise )–one time report.

15 KKNPP,NPCIL Yet to Report Yet to Report Yet to Report Yet to Report KKNPP,NPCIL Is requested to send

the consolidated List of Batteries installed in their system( Substation

wise )–one time report.

Yet to Report

16 Puducherry Reported Healthy

Yet to Report - Yet to Report

Yet to Report Puducherry is requested to send the report on monthly basis (i.e on 7th of every month)

17 JSWEL Yet to Report Yet to Report Yet to Report Yet to Report JSWEL is requested


18 UPCL Yet to Report Yet to Report Yet to Report Yet to Report JSWEL is requested


Note: Constituents are requested to send the consolidated List of Batteries available in their system as a one time report.

Documents

SOUTHERN REGIONAL POWER COMMITTEE · Logic for 765 KV Sholapur Raichur Line MW for 10 sec) in 765kV Operation o f Over current protection (800 A or 1000 Sholapur-Raichur line (Import