southern regional power committee - karnataka · 2015-03-30 · southern regional power committee...

SOUTHERN REGIONAL POWER COMMITTEE

BANGALORE

Agenda for the 42

nd Meeting of Protection Coordination Sub-Committee of

SRPC to be held on 26.03.2015 Thursday)

1. Introduction

2. Confirmation of Minutes of last PCSC meeting

Confirmation of minutes of 41st

Protection Coordination Sub-Committee meeting held

on 26.02.2015.

3. Grid Occurrences (w.r.t. SRLDC)

3.1 Grid Disturbance (GD), Grid Incidences (GI), and trippings due to failure of Auto-

reclosing (A/R), and Mal-operation of PLCC equipment that occurred during the

last one-month period (February-March, 2015) would be discussed in the PCSC meeting [Annexure-I]

Constituents are requested to furnish the following information in respect of the

above grid occurrences to have fruitful discussions in the PCSC forum.

(a) Single line diagram of the station with switching devices, CT, PT and relay

details

(b) Relay settings adopted

(c) Remedial measures/ Action taken

3.2 In compliance of Regulations 5.2 (r) of IEGC – as per the provisions under clause

1.5 of IEGC 2010, the Constituents are requested to furnish the following information in respect of Grid Occurrences (indicated as in Annexure-II) latest

by 20.03.2015:

(a) First Information Report (FIR)

(b) Event Logger (EL) output

(c) Disturbance Recorder (DR) output

(d) Trip event analysis report (with pre and post fault system conditions)

Non-furnishing of Tripping details including Disturbance Recorder/Sequential

Event logger output would be discussed in the meeting.

4. Submission of reports/compliance by Constituents

4.1 Status of pending Protection Coordination Sub-Committee (PCSC)

Recommendations

Status of the pending PCSC recommendations (from 30th

PCSC to 39th

PCSC) as circulated vide email dated 09.02.2015 (Annexure-III) may please be sent latest

by 20.02.2015.

Agenda for the 42nd Protection Coordination Sub Committee Meeting to be held on 26.03.2015 Page 2

4.2 Remedial measures for "Transmission Line under Forced Outage"

The constituents are requested to send the remedial measures/ actions taken by them for the tripping events as circulated vide our emails. (Annexure-IV)

The trip events are based on the daily reports at SRLDC website

http://srldc.in/DailyReport.aspx under the menu: Reports->Daily-> "TL under

Forced Outage")

4.3 Certificate for Healthiness of Batteries

As per the MoP direction given in pursuant to recommendations of the

Enquiry Committee (NEW grid disturbance on 30th

& 31st July, 2012), RPC’s

are required to obtain from their respective Constituents the monthly

certificate for healthiness of batteries, installed at 220 KV and above voltage

level Substations (for power supply to Relays, RTUs and PLCC equipment)

and furnish the same to CEA/ MoP.

With reference to above, the Constituents are requested to submit the

certificate on healthiness of batteries on monthly basis (i.e. on 7th

day of the

month) to SRPC.

The sought status for the month of February, 2015 is still awaited from the

following SR-Constituents:

APTRANSCO, TSGENCO (Thermal & Hydro), KPTCL, TANGEDCO,

PGCIL (SR-I & SR-II), NTPC (Ramagundam & Simhadri), NTECL,

JSWEL, GMR, NTPL, CEPL.

A model certificate, in this regard, is given below for kind information of the

Constituents:

Sl. No.

Station Application Battery Battery Charger Remarks

Station Name

Code Type

(PS/ SS)

Protection/ Communication

Details Status (Healthy/ Unhealthy)

Details Status (Healthy/ Unhealthy)

1 Station-A Protection (Bank-1)

Protection (Bank-2)

Communication (Bank-1)

Communication (Bank-2)

2 Station-B …

Note: 1. Code is the short name of the Station

2. PS – Power Station; SS – Substation

5. Configuration change details

As per the information furnished by the SR-Constituents to the OCC forum in their 104th

meeting held on 10.02.2015 (Minutes circulated on 02.03.2015), it is informed that no

network configuration changes (additions/ deletions/ modifications of transmission

elements) took place in the month of January, 2015.

http://srldc.in/DailyReport.aspx


6. Dynamic study data submission

In the earlier meetings of PCSC, the forum had decided to collect the Dynamic

study data from the utilities to study the Southern Region system. The dynamic

study format was circulated to the constituents to send the Generator, Excitation

system, Governor, HVDC parameters. The forum opined that the dynamic study

details of the IPPs also are necessary to conduct the study of SR system.

All the SLDCs were requested to direct the embedded IPPs connected at 220 KV

and above voltage level to send the completed dynamic study format to SRPC,

Secretariat.

It is requested that the dynamic study data in the stipulated format may be sent to

SRPC at the earliest by email.

7. 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

8. Compliance of Hon’ble CERC Orders.

8.1 Petition No. 146/MP/2013 with I.A. 36/2013: Order dated 20.02.2014

Compliance of Regulations 5.2 (r) of the Grid Code: Issue regarding non-

furnishing of FIR / Trip Analysis Report, EL, DR, etc. was also

highlighted. It is pointed out that the above reports are to be submitted /

uploaded on SRLDC web application within 24 hours as mandated under

IEGC / CEA Regulations.

Implementation of Phase-I and Phase-II of Protection Audit

Recommendations: All the constituents are requested to submit the updated

status of the compliance (those who have not completed recommendations

mentioned in the Phase I and Phase II) to SRPC Secretariat at the earliest.

The following constituents are to submit the updated status of filing of

petition/affidavit to SRPC Secretariat at the earliest: APTRANSCO.

Compliance of Regulations 5.2 (e) & 5.2 (l) of the Grid Code and Regulation

3(1)(e) of CEA Grid Standards: The constituents are requested to strictly

comply with these provisions by ensuring standard protections systems having

the reliability, selectivity, speed and sensitivity to isolate the faulty equipment

and protect all components from any type of faults, within the specified fault

clearance time and providing protection coordination

Ensuring proper maintenance of transmission lines and adopting best O&M

practices: The constituents are requested to conduct line patrolling regularly

as per the SRPC transmission line patrolling guidelines (available under the

menu item "All Uploads Operation Miscellaneous Transmission Line

Patrolling Protocol / Guidelines for Southern Region" on SRPC website).


(http://www.srpc.kar.nic.in/website/2014/operation/patrolling.pdf).

8.2 Petition No. 167/Suo- Motu/2012: Order dated 22.02.2014

The Constituents are requested to follow approved protection philosophy

ISTS licensees are requested to submit details of updated distance protection relay

setting of all inter-regional lines to POSOCO & RPCs.

All SLDCs are requested to install/activate sound recording system in their control

rooms within three months from the date of issue of this order.

The Constituents are requested to submit the progress of implementation to

SRPC and SRLDC as specified in the Hon'ble CERC Order.

8.3 Petition No. 263/MP/2012: Order dated 19.12.2013

Constituents are requested to implement the quantum of relief by AUFR and df/dt

relays by identifying additional feeders and keep them functional within one month

of issuing this order.

SLDCs are also requested to map these relays on their respective SCADA

system within three months of issuance of this order.

The Constituents are requested to submit the progress of implementation to

SRPC and SRLDC as specified in the Hon'ble CERC Order.

8.4 Petition No. 374/MP/2014: Date of hearing 15.01.2015

All Southern Region Constituents had been directed to file the status of

implementation of protection system in their respective system to Hon’ble

CERC by 31.03.2015.

9. Other Protection Issues, if any, with the permission of the Chair

10. Sending Agenda items for the PCSC meetings

As per the Guidelines of CEA/MOP, it has been decided to conduct the PCSC

meetings on 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.

11. Date of next PCSC meeting

The 43rd

PCSC meeting would be conducted on 29.04.2015 (Wednesday) at SRPC,

Bangalore.

*******

http://www.srpc.kar.nic.in/website/2014/operation/patrolling.pdf

Grid Occurrences

1. / - Details of Grid Disturbances:

Sr. No.

. . /

Details of Event

/ Date &

मय /Time / Reason

/Remarks

/ Category

1

Complete outage of 220kV Sedam substation of KPTCL

15-02-2015 at 14:24 hrs

Fault occurred in 220kV Sedam-Shahpur line

GD-1

2

Complete outage of 220kV Ambewadi substation of KPTCL

12-03-2015 at 7:51 hrs

Fault in 220kv Ambewadi-Nagjheri line-2

GD-1

3

Complete outage of Upper Sileru power station of

04.03.2015 at

08:00 hrs on LBB of Unit-4 got operated

GD-1

2. / - Details of Grid incidents:

Sr. No.

.

.

/

Details of Event

/ Date &


/Remarks

/ Category

1

Tripping of 400kV Coastal-Tuticorin PS line

19-02-2015 at 16:37 hrs

Line tripped at Coastal end only due to suspected PLCC mal-operation and was holding from Tuticorin PS end. Running Unit at Coastal energen also got tripped during the event.

--

2

Tripping of 220kV Chikodi-Talandage and 220kV Chikodi-Mudshingi line

20-02-2015 at 06:40 hrs

Lines tripped during test charging 220kV Chikodi-Belgaum line-2 from Chikodi end.

3

Outage at Regulapadu station of APTRANSCO

21-02-2015 at 00:49 hrs

Y-Ph Metering PT failed at 220KV Ragulapadu Substation. Fault got cleared by tripping of lines from remote ends.

4 Tripping at 230kV Theni substation

22-02-2015 at 13:12 hrs

Fault had occurred in 230kV Theni-Chekanoorani feeder.

GI-1

5

Tripping of 400/220kV ICT-2 at Bidadi substation

22-02-2015 at 16:58 hrs

ICT-2 got tripped on operation of backup protection during B-phase LA failure of ICT-1 at Neelamangala station of KPTCL

6

Tripping of ICT-1 at Neelamangala substation of KPTCL

22-01-2014 at 16:58 hrs on

ICT-1 at Neelamangla station got tripped due to failure of B-phase lightening arrester.

7

Tripping of 400kV Jeypore-Gazuwaka line-1&2 and tripping of HVDC back to back pole-1&2 at Gazuwaka

23-02-2015 at 13:34 hrs on

HVDC pole-1 got tripped due to failure of 4 no. power supply card. HVDC pole-2 tripped on DC low voltage trip. 400kV Jeypore-Gazuwaka line-1&2 tripped due to operation of Over voltage protection at Gazuwaka end.

GI-2

Annexure-I

Sr. No.

.

.

/

Details of Event

/ Date &


/Remarks

/ Category

8

Tripping of HVDC Talcher-Kolar pole-1

23-02-2015 at 15:37 hrs

Pole 1 of Talcher-Kolar HVDC Transmission system tripped on receipt of ESOF (Emergency Switch-off) from Talcher

GI-2

9 Tripping of 765/400kV ICT-1 at Raichur

25-02-2015 at 18:32 hrs

ICT-1 at Raichur tripped due to mal-operation of contact multiplication relay

10 Tripping of ICT-3 at Gajwel substation

27-02-2015 at 2:32 hrs

ICT-3 tripped due to operation of over current relay

11

Tripping of 220 kV Chikodi-Talandage and Chikodi-Mudshingi line

01-03-2015 at 3:37 hrs

220KV Chikodi-Talandagi & 220KV Chikkodi-Mudashingi lines tripped from Talandage and Mudshingi due to 400KV Karad line fault

12

Tripping of 400kV Neelamangala-Mysore Line-2

01-03-2015 at 2:19 hrs & 18:01 hrs

Line tripped on operation of over voltage protection at Neelamangala end. Suspected faulty Y-phase CVT had caused the tripping.

13 Tripping of 400kV Neelamangala-Mysore Line-1

02-03-2015 at 23:30 hrs

Line tripped on operation of over voltage protection at Neelamangala end.

14 Tripping of ICT-1, 2 at Trissur substation of KSEB

03-03-2015 at 17:02 hrs

Bus-bar protection got operated at Trissur substation

15 Tripping of 400/220kV ICT-2 and 3 at Hoody substation of KPTCL

3-03-2015 at 23:44 hrs

Mal-operation Oil surge relay

16 Tripping of UNIT- 4 & 6 at Jindal power station

08-03-2015 19:41hrs

Units tripped due to tripping of SUT. GI-2

17 Tripping of ICT-1 at Munirabad

08-03-2015 19:41hrs

ICT -I got tripped on operation of 220KV E/F

18

Multiple tripping at Raichur thermal power station of KPCL

09-03-2015 at 06:36 hrs

400kV Raichur TPS-Raichur(PG) line-1&2, 400kV Raichur-Mahboobnagar, Unit#7 ant ICT-2 at RTPS tripped during the incident. B phase to earth fault had occurred in 400kV Raichur TPS-Raichur line-1

GI-2

19

Tripping of 220kV Kaiga-Kodassalli line, Unit-1, 2&3 at Kaiga PowerStation

11-03-2015 at 21:59 hrs

B-phase CT failed in 220kB Kaiga-Kodasalli line. Bus bar protection of 220kV Bus-2 got operated

GI-2

Annexure-I

Sr. No.

.

.

/

Details of Event

/ Date &


/Remarks

/ Category

20

Tripping of ICT-2 at Mahboobnagar

09-03-2015 at 7:57 hrs

Tripped on operation of restricted earth fault (REF) relay while charging 400kV RaichurVeltoor feeder

GI-2

21

Tripping of 400 kV Dichipally – Ramagundam and Unit-6 at Ramagundam

09-03-2015 at 00:56 hrs

Line tripped on B phase to earth fault. Unit-6 tripped on operation of GT differential protection

3. Lines tripping due to PLCC mal-operation/ one end

Sr. No.

.

.

/

Details of Event

/ Date

&

मय /Time

/ Reason /Remarks

/ Category

1

Tripping of 400kV Ghanapur-Mamidapalli line

18-02-2015 at 12:12 hrs

Line tripped from Mamidapalli end due to direct trip receive from Ghanapur

--

2

Tripping of 400 kV Khammam-Kalpakka line-1

18-02-2015 at 12:58 hrs

Line tripped at Kalpakka end only due to direct trip receive and was holding from Khammam

3

Tripping of 400kV Malkaram-Hyderabad line

20-02-2015 at 10:37 hrs

Line tripped at Malkaram end only due to direct trip receive and was holding from Hyderabad end.

4

Tripping of 400kV Munirabad-Guttur line

21-02-2015 at 00:26 hrs

Line tripped at Munirabad end only due to direct trip receive and was holding from Guttur

5

Tripping of 400kV Hiryur-Neelamangala line-2

27-02-2015 at 17:19 hrs

Line tripped at Neelamangala end only and was holding from Hiryur.

6

Tripping of 400kV NLC EXP-IL&FS line

28-02-2015 at 19:17 hrs

Line tripped from NLC expansion end only due to direct trip receive and line was holding from IL&FS.

7

Tripping of 400kV Narendra-Guttur

11-03-2015 at 17:16 hrs

Line tripped at Narendra end only due to DT receive

8

400 kV Tiruvelam - Kalivandapatu 1

11-03-2015 at 19:32 hrs

Line tripped at kalivaldapattu end only due to DT receive

Annexure-I

4. Failure or non-operation of Auto reclose during transient fault

Sr. No.

Element Date & Time

Reason

1

Tripping of 400kV NTPL-

Tuticorin P.S line 23-02-2015 at

4:42 hrs

and

24-02-2015 at

4:30 hrs

Transient fault in B-phase and line

auto-reclosed from Tuticorin P.S

end. Line failed to reclose from

NTPL end

2

Tripping of 400kV Jeypore-

Gazuwaka line-1 28-02-2015 at

00:19 hrs R-phase to earth fault had

occurred in line. Line auto

reclosed at Jeypore end and failed

to reclose at Gazuwaka.

3

Tripping of 400kV Coastal-NTPL

line

02-03-2015 at

3:51 hrs

Line tripped on a B-phase to earth

fault. Line auto-reclosed from

coastal end and tripped at NTPL

end.

4 Tripping of 220kV Ambewadi-

Ponda line-1

11-03-2015 at

11:10

Line did not auto reclose

5 Tripping of 220kV Ambewadi-

Ponda line-2

11-03-2015 at

13:32


Annexure-I

Annexure-II

Meeting

No / Index

Meeting

S.NO

Details of Event Date Reason PCSC Recommendations Utility

Responsible to

implement*

Status of Recommendations as on 13.03.2015 Remarks

39/III/1 1 Tripping of 400kv

VTPS-Satenapalli line-

1 &2

10, 11, 13, 14,15

Dec 2014 voltage.

and grading in over voltage

protection needs to be verified.

Deliberations:

Time grading for the over

voltage trip of the lines are 9

& 7 seconds, which are in line

with the suggested grading.

Recommendations:

PCSC forum recommended

APTRANSCO to check up the

drop off to pick up ratio of the

Overvoltage relay and correct

it (if needed).

APTRANSCO/

APGENCO

APTRANSCO informed vide their e-mail dated

27.02.15 that the issue pertains to APGENCO.

Pending

30/I/A 1 RTPS Tripping incidents

and the Spl meeting held

at RTPS on 13th and 14th

March 2014

Mar-14 Spl meeting held at RTPS on

13th

and 14th

March 2014

The PCSC forum recommended for

replacement of existing electromechanical relays with Numerical

relays.

KPCL 1. e- Tender folated for the retrofit of existing

static relays with Numerical version for lines

M.nagar,M.bad,ICT-1 & 2 -Technical Bid

opened & price bid yet to be opened.

2. Retrofit of existing bus bar (CAG-34) with

numerical version -Budgetetory offers obtained

and is under process. ----

---------------------------------------

3. Order placed on M/s Siemens to replace

relays. The work will be Completed by May -

2015.

Pending

33/II/3 9 400kV

Hiriyur-BTPS line-2

22-05-14 &

23/05/2014

B phase to ground fault had

occurred in line and line auto

reclosed at Hiriyur end but

failed to reclose at BTPS end.

• KPCL: A/R is not yet enabled at Raichur plant.

Recommendation:

The PCSC forum requested KPCL to enable the A/R feature at

RTPS end before next PCSC meeting (i.e. 31st July, 2014.

KPCL 1. A/R for 220kV lines enabled already.

2. Shtu down of lines availed to commission the

auto reclosing schme fro 400 kV line at BTPS.

3. A/R shall be enabled in next shutdown

Pending

34/III/1 8 400kV

Raichur-BTPS line

26-06-2014 Transient fault in R-phase.


Recommendation:

A/R at BTPS end to be made operational within one month

KPCL 1. A/R for 220kV lines enabled already.

2. Shtu down of lines availed to commission the

auto reclosing schme fro 400 kV line at BTPS.

3. A/R shall be enabled in next shutdown

Pending

Pending Implementaion of PCSC Recommendations (30th to 39th)

AP

TS

KAR

Annexure-III

38/GD/3.5 5 GD-1 at Kadra and

Kodasalli hydro power

station

13-11-2014 at

19:31hrs

A fault had occurred in 220 kV

Kadra and

Kodasalli. As A result, de-

energization of

220kV bus occurred at Kadra

and

Kodasalli.

Recommendations & follow up:

Numerical Distance Protection relay in Kadra –Kaiga and Kodasalli

–Kaiga.

status of PSAG-10 recommendations within a week’s time.

KPCL All the recommendations of PSAG - 10 are

completed except the following pending issue:

i)e-NIT floated on 28.07.2014 for procurement of

Numerical distance relays & GPS. Bid

evaluation is under progress. The work will be

completed by December - 2015. Hower, as per

the recommendations of PSAG, Relays were

temporarily rearranged, replaced and wired up.

testing & commissioning shall be completed with

the assistance of KPTCL by March 1st week ,

2015.

Pending

34/I/6 2 400/220 kV ICT-1 & 2 at

MUNIRABAD

16-07-2014 As reported directional over

current relay of ICT’s operated

due to snapping of line

jumper in 220kV Lingapur

line.

Recommendations:

Bus bar protection shall be provided by asset owner ( i.e

KPTCL) .

Settings for main distance protection & Overcurrent

protection shall be examined and reviewed.

Time synchronization of the Substation shall be ensured.

KPTCL Management approval is obtained for taking up

the work of providing bus bar protection to

220kV buses at Guddadahally (Munirabad) Sub

Station along with replacement of 3 core/age old

CTs of 220kV bays belong to KPTCL.

Under implementation

Pending

38/GD/3.1 1 GD-1 at Mahalingapura

Substation of KPTCL

25-10-2014 Fault had occurred in 220kV

Mahalingapura-Narendra line-2.

Due to the

failure of relay operation at

Mahalingapura,

breakers at remote end tripped

which

resulted in bus dead condition.

Recommendations:

a. PCSC forum recommended KPTCL to replace the old static

distance protection relays with numerical relays.

b. PCSC forum also requested KPTCL to provide a broken

conductor alarm indication in Control Room.

c. Standing instruction needed to be given to the all substation

personnel for not changing the relay settings without approval of

RT/MRT wing.

KPTCL Yet to be informed Pending

38/GD/3.2 2 GD-1 at Guttur

Substation of KPTCL

05-11-2014 at

11:42 hrs

Circuit breaker of 400kV Guttur-

Hiriyur

line-1 failed at Guttur end while

availing

shutdown for replacement of

CVT. The

failure of breaker caused bus

fault at Guttur.

Recommendations:

KPTCL was requested to expedite the early implementation of

pending recommendations of:

1. Protection audit recommendations

2. PSAG-4, PSAG-5, and PSAG-8 (Annexure)

KPTCL Pending

39/I/5 5 Tripping of 400/220kV

ICT-2 at Hoody

substation of KPTCL

01-12-2014 Suspected mal-operation of

220kV side Rphase

over current relay

Recommendations:

1. PCSC forum recommended KPTCL to replace the relay with a

different make.

2. KPTCL was also requested to train the O&M personnel

adequately before performing any maintenance works to avoid such

unwanted trippings.


Annexure-III

39/I/8 8 Tripping of 220kV

Chikodi-Talandage&

220kV Chikodi-

Mudshingi lines

01-12-2014 Talandge line tripped at

Chikkodi

end on Back up protection.

Meanwhile Mudashinge line

tripped

at Maharastra end on DPR,Zone-

2.

Recommendations:

KPTCL was requested to get tripping report details from the

stations (i.e. Talandage,

Mudashinge and Chikodi) and furnish them to PCSC forum.


39/I/10 10 Tripping of

Neelamangala- Hoody

Ckt-1&2 along with

Hoody ICT-2

13-12-2014 It was reported that bus bar

protection

got operated at Hoody

substation.

Recommendations:

measures shall be submitted to PCSC forum.


36/II/9 14 400kV Arasur-Mettur

Line I

29-09-2014 Recommendation:

Mettur S/s to Enable A/R Scheme.

TANTRANSCO 1. During the 38th PCSC meeting,

TANTRANSCO informed that the Auto

Reclosing facility would be enabled within 15

days. 2.

A/R scheme will be implemented after the

commissioning of 400 kV Thiruvalam Line-I &

II.

Pending

37/II/3 13 400kV Mettur-Arasur

line-1

29-09-2014 Line tripped due to Y-Phase to

earth fault.

Line did not auto reclose as

Auto reclose scheme is kept in

non-auto mode.

Recommendation:

A/R is not in service.




days. 2.



II.

Pending

38/II/3 3 Tripping of 400kV

Mettur-Arasur line-2

22-10-2014 Line tripped on Rphase

to earth fault.

non-auto mode.

TANTRANSCO informed that A/R feature would be

enabled in the line within 15 days.




days. 2.



II.

Pending

38/GD/3.3 3 GD-1 at North Kerala

System

11-11-2014 at

02:02hrs

De-energization of 220kV bus

occurred at

Areakode, Madakathara and

Shoranur.

Recommendations

1. The PCSC forum requested KSEB to submit the complete

analysis report of the Grid disturbance (i.e with DR, EL and KSEB

substation connectivity diagram) with the remedial measures taken

within a week’s time to SRPC Secretariat.

2. KSEB shall initiate measures for the following and report the

status to PCSC forum by next PCSC meeting:

3 To rectify the trip coils at Shoranur on Areakode line CB

4 To check the healthiness of trip coils at all other stations also.

5 To make LBB protection functional at Shoranur s/s.

6 Tohave trip circuit supervision provision with annunciation, if

feasible.

7 The status of implementation of SPS (meant for lines at

Madakathara S/S) shall be communicated to PCSC forum by next

PCSC meeting.

KSEB Pending

TN

KSEB

Annexure-III

38/GD/3.4 4 GD-1 at North Kerala

System

12-11-2014 at

17:37 hrs

De-energization of 220kV bus

occurred at

Areakode, Kanhirode and

Orkattery.

Recommendations

1. The PCSC forum requested KSEB to submit the complete

analysis report of the Grid disturbance (i.e with DR, EL and KSEB

substation connectivity diagram) with the remedial measures taken

within a week’s time to SRPC Secretariat.

2. Uniform settings for A/R feature shall be kept at both the ends of

the line.

3. Provision of alarm feature shall be considered for indicating low

pressure in Circuit Breaker system.

KSEB Pending

34/I/3 1 Tripping of HVDC

Bhadravati Pole-1 & 2

09-07-2014 As reported, pole-1&2 tripped

due to auxiliary supply failure.

Recommendations:

issue with WRTS to submit the report as per IEGC guidelines.

requested to write a letter to WRLDC to submit

the reports to SRPC also.

it up with WR and PGCIL if the issue is not getting resolved.

Complete analysis of the faults and rectification/remedial action

taken to avert similar occurrence in the HVDC Back to Back station

shall be submitted.

PGCIL 1. Implementation of Tertiary Winding of ICT for

the auxilliary power supply is going to come up

which resolves this issue.

2. PGCIL informed that all issues would be

discussed during PSAG-11 visit.

Pending

34/I/7 3 HVDC

BHADRAVATHI POLE

2

18-07-2014 As reported pole-2 tripped due

on 5th harmonic alarm.

Recommendation :

Complete analysis of the faults and rectification/remedial action

taken to avert similar occurrence in the HVDC Back to Back station

shall be submitted.

The PCSC forum recommended PGCIL, SRTS-I take up the issue

with WRTS to submit the report as per IEGC guidelines.

SRLDC is also requested to send a letter to WRLDC to submit

the reports to SR also.

Based on the SRTS/SRLDC correspondences, SRPC would take it

up with WR and PGCIL if the issue is not getting resolved.

PGCIL Yet to be informed Pending

39/I/1 1 Tripping of 400kV

Gooty-Somanahalli

22-11-2014 Line tripped due to

suspected PLCC

Mal-operation at Gooty

end.

Recommendations:

Retrofitting of the relay or installation of Optical Fiber cable is

recommended by PCSC forum to PGCIL.


39/I/9 9 Tripping of HVDC

pole-2 of Talcher -

Kolar

16-12-2014

due to problem in valve cooling

system.

operated resulting in load

shedding of 1258

MW.

Recommendations:

1. PGCIL shall test the pumps during pole shutdown and submit the

report to PCSC forum.

2. PGCIL shall conduct mock test for SPS signals to Kerala and

submit the feedback to PCSC forum.


PGCIL

Annexure-III

37/I/9 9 Tripping of 400/220kV

ICT-1&2 at UPCL

04-10-2014 ICT-1&2 tripped during

transient fault in R-phase in

400kV Hassan-UPCL line-1

Recommendations:

To avoid tripping of ICTs for line fault, UPCL is requested to

review the settings of ICT’s SEF relay and consider IDMT

setting instead of existing Definite Time setting.

UPCL It has been reported by UPCL that, the work of

review of relay coordination and setings for the

entire plant is given to M//s Alstom for entire

plant. UPCL has furnished the settings given by

M/s Alstom for verification. Revised settings will

be issued this week for implementation

Pending

36/II/8 13 400kV Raichur-

Munirabad line

07-09-2014 B-phase to earth fault had

occurred in line.

Line auto reclosed at Munirabad

end and failed to reclose at

Raichur end.

KPTCL:

PD (pole discrepancy) time delay would be changed.

PGCIL /

KPTCL

Yet to be informed Pending

37/I/6 6 Tripping of 400KV

Hassan-UPCL line-2

25-09-2014 High resistance fault as the fault

ampere was very less i.e., 0.6kA

at Hassan end and nearly 0.9kA

at UPCL end.

Back up earth fault protection

had operated at Hassan.

At UPCL end the high

resistance fault got converted

into a R ph-B-ph fault which

resulted in operation of distance

protection Zone-1.

The reason for non-picking up

of Back up earth fault at UPCL

needs investigation.

Recommendations:

a. At UPCL end, unused zones of distance protection (probably

zone 5 to 8) shall be disabled.

b. At UPCL end, time synchronization between main-1 and main-

2 relays shall be ensured.

c. UPCL shall ensure time synchronization with Hassan

substation.

d. Reasons for non operation of back up protection at UPCL for

high resistance fault is to be submitted.

e. Reasons for not sending DT to UPCL by Hassan end is to be

submitted.

f. Settings of UPCL are to be reviewed and informed to PCSC

forum.

UPCL /

KPTCL /

It has been reported by UPCL that, the work of

review of relay coordination and setings for the

entire plant is given to M//s Alstom for entire

plant. UPCL has furnished the settings given by

M/s Alstom for verification. Revised settings will

be issued this week for implementation.

Pending

38/III/10 10 Tripping of

400kV Hassan-

UPCL line-2

19-10-2014 operation of over voltage

protection at UPCL end

KPTCL and UPCL are requested to send the report with details of

the overvoltage tripping.

UPCL /

KPTCL /

Yet to be informed Pending

38/II/5 5 400kV Ramagundam-

Hyderabad line-4

27-10-2014

to earth fault.

reclose at Hyderabad

end due to

PLCCmal-operation.

Planned to replace the PLCC system within a week's time at both

the ends during the shutdown.

NTPC,

PGCIL

Yet to be informed. Pending.

38/II/2 2 Tripping of 400kV

Khammam- Kalpakka

line

11-10-2014 Line tripped on Yphase

to earth fault.

reclose at Khammam

end.

Recommendations:

APTRASNCO and TSTRANSCO were requested to clear the

corridor jointly at the earliest.

PGCIL/

APTRANSCO/

TSTRANSCO


39/I/2 5 Tripping of

400Kv Ghanapur-

Mamidipally

line

22-12-14

at 10:52 hrs,

24-12-14 at 11:32

hrs,

24-12-14 at 16:16

hrs

Due to PLCC Mal-operation at

HYD S/S end, DT received at

MMPLY end and line got

tripped.

Recommendations:

PGCIL is requested check up with the manufacturer to resolve the

issue and submit remedial measures to PCSC forum.

PGCIL/

TSTRANSCO


Miscellaneous

Others

Annexure-III

Pending Remedial Measures/ Actions taken

for the Transmission lines under Forced Outage (as on 12.03.15)

SN Element Name Outage date/time

Revival date/time

Reason for Outage Remedial Measures/ Action taken

1 220 kV AMBEWADI - PONDA 1 06-01-2015/ 12:01:00

06-01-2015/ 12:20:00

TRIPPED ON EARTH FAULT To-be-discussed

2 HVDC BHADRAVATHI POLE 2 08-01-2015/ 09:57:00

08-01-2015/ 10:16:00

NON VALID TAP CODE To-be-discussed

3 220 kV NEYVLI - BAHOOR 11-01-2015/ 15:42:00

11-01-2015/ 17:26:00

R-N FAULT To-be-discussed

4 400 kV VIJAYAWADA - NELLORE 1 22-01-2015/ 11:39:00

22-01-2015/ 11:56:00

DIFFERENTIAL PROTECTION OPERATED

To-be-discussed

5 400 kV SRISAILAM-MAMIDIPALLI 2 23-01-2015/ 16:10:00

23-01-2015/ 19:28:00

BUS2 DEAD WHILE CONVERTING SSLM GEN TO COND. MODE

To-be-discussed

6 400 Kv SATTENAPALLI - SRISAILAM 1 23-01-2015/ 16:10:00

BUS2 DEAD WHILE CONVERTING SSLM GEN TO COND. MODE

To-be-discussed

7 400 kV NLC EXP- ILFS 24-01-2015/ 13:15:00

24-01-2015/ 16:52:00

TRIPPED ON R-N FAULT To-be-discussed

8 400 kV NLC EXP- ILFS 27-01-2015/ 10:05:00

27-01-2015/ 11:20:00

CONTROL CKT PROBLEM @ ILF &S To-be-discussed

9 400 kV RAMAGUNDAM - N'SAGAR 1 03-02-2015/ 16:23:00

03-02-2015/ 16:40:00

LR PRV OPERATED @ NSR To-be-discussed

10 400 kV NLC EXP- ILFS 05-02-2015/ 06:05:00

05-02-2015/ 07:14:00

PLCC MALOPERATION AT NLC 1 EXP

To-be-discussed

11 400 Kv COASTAL - TTRNPS 07-02-2015/ 01:07:00

DISTANCE PROTECTION ACTED To-be-discussed

12 400 Kv COASTAL - NTPL 08-02-2015/ 00:08:00

B-N FAULT To-be-discussed

13 400 Kv UDUMALPET - PALLAKAD 1 09-02-2015/ 09:50:00

09-02-2015/ 09:58:00

PLCC MALOPERATION To-be-discussed

Annexure-IV

14 400 Kv UDUMALPET - PALLAKAD 2 09-02-2015/ 09:50:00

09-02-2015/ 09:58:00


15 400 Kv NTPL - TTRNPS 09-02-2015/ 03:17:00

TRIPPED DUE TO HEAVY ARCING AT NTPL END

To-be-discussed

16 HVDC GAJUWAKA POLE 2 10-02-2015/ 16:25:00

10-02-2015/ 18:49:00

SOUTHERN ORISSA DISTURBANCE To-be-discussed

17 400 kV JEYPORE - GAZUWAKA 1 10-02-2015/ 16:24:00

10-02-2015/ 17:17:00



10-02-2015/ 20:20:00



10-02-2015/ 17:54:00

SOUTH ORISSA DISTURBANCE To-be-discussed

20 400/220 kV ICT-2 AT HIRIYUR 11-02-2015/ 14:56:00

11-02-2015/ 14:57:00

TRIPPED DUE TO NTAMC WORK To-be-discussed

21 400 Kv NTPL - TTRNPS 13-02-2015/ 23:12:00

14-02-2015/ 00:15:00

B - N FAULT To-be-discussed

22 400 Kv HIRIYUR-BTPS 2 13-02-2015/ 17:07:00

13-02-2015/ 17:20:00

TRIPPED AT BTPS To-be-discussed

23 400 Kv COASTAL - NTPL 13-02-2015/ 22:54:00

REASON AWAITED To-be-discussed

24 400 Kv NTPL - TTRNPS 14-02-2015/ 01:41:00

DISTANCE PROTECTION To-be-discussed

25 400 Kv NTPL - TTRNPS 14-02-2015/ 06:55:00

14-02-2015/ 08:49:00


26 220 kV PONDYCHERRY- BAHOOR 15-02-2015/ 11:20:00

15-02-2015/ 14:23:00

TRIPPED ON OVER CURRENT To-be-discussed

27 400 kV NEYVELI TS 2 - PUGALUR 15-02-2015/ 18:38:00

15-02-2015/ 18:51:00

TRIPPED DUE TO PLCC MALOPERATION

To-be-discussed

28 220 kV NEYVLI - BAHOOR 15-02-2015/ 11:20:00

15-02-2015/ 13:13:00

TRIIPED ON OVER CURRENT To-be-discussed

29 400 kV TALAGUPPA - NEELAMANGALA 18-02-2015/ 16:04:00


30 400 kV MUNIRABAD - GUTTUR 18-02-2015/ 07:40:00

18-02-2015/ 12:44:00


Annexure-IV

31 400 kV GHANAPUR - MAMIDIPALLY 18-02-2015/ 12:12:00

18-02-2015/ 12:12:00


32 400 kV KHAMMAM - KALPAKKA 1 18-02-2015/ 12:58:00

18-02-2015/ 14:28:00


33 400 Kv COASTAL - NTPL 19-02-2015/ 16:53:00

19-02-2015/ 17:17:00

TRIPPED DUE TO LOW VOLTAGE To-be-discussed

34 400 Kv COASTAL - TTRNPS 19-02-2015/ 16:37:00

19-02-2015/ 16:56:00

DT RECIEVED AT COSTAL END To-be-discussed

35 220 Kv CHIKKODI - MUDUSHINGI 20-02-2015/ 06:40:00

20-02-2015/ 07:36:00

TRIPPED DUE TO R-PH FAULT To-be-discussed

36 400 kV MALKARAM - HYDERABAD 20-02-2015/ 10:37:00

20-02-2015/ 10:52:00


37 220 Kv CHIKKODI - TALANDGE 20-02-2015/ 06:40:00

20-02-2015/ 08:07:00

TRIPPED AT CHIKKODI END To-be-discussed

38 400 kV KAIGA - GUTTUR 2 21-02-2015/ 14:18:00

21-02-2015/ 18:47:00


39 400 kV MUNIRABAD - GUTTUR 21-02-2015/ 00:26:00

21-02-2015/ 00:43:00

DT RECIEVED To-be-discussed

40 400/220 kV ICT-1 AT NEELAMANGALA 22-02-2015/ 16:58:00

22-02-2015/ 18:17:00

TRIPPED DUE TO B-PH LA FAILURE To-be-discussed

41 220 kV KANIAMPET - KADAKOLA 22-02-2015/ 16:25:00

22-02-2015/ 16:51:00


42 400/220 Kv ICT-2 AT BIDADI 22-02-2015/ 16:58:00

22-02-2015/ 20:15:00

TRIPPED DUE TO TRANSIENT EART FAULT DUE TO TRIPPING OF NLM ICT

To-be-discussed

43 HVDC TALCHER - KOLAR POLE 1 AT TALCHER

23-02-2015/ 15:37:00

23-02-2015/ 15:55:00

TRIPPED WHILE TAKING DC FILTERS To-be-discussed


23-02-2015/ 21:46:00

DT RECIEVED FROM JEYPORE To-be-discussed


23-02-2015/ 18:03:00

DUE TO TRIPPING OF INCOMING LINES

To-be-discussed

46 400 Kv NTPL - TTRNPS 23-02-2015/ 04:42:00

INSULATOR FLASHOVER To-be-discussed

47 400 Kv NTPL - TTRNPS 24-02-2015/ EARTH FAULT To-be-discussed

Annexure-IV

04:30:00

48 400 kV TALAGUPPA - NEELAMANGALA 24-02-2015/ 11:11:00

24-02-2015/ 11:16:00


49 765/400 kV ICT-1 at RAICHUR 25-02-2015/ 18:32:00

25-02-2015/ 20:32:00

MALOPERATION OF WINDING TEMPERATURE INDICATION

To-be-discussed

50 400 kV N'SAGAR - CUDDAPPA 2 26-02-2015/ 17:23:00

26-02-2015/ 18:06:00

Y-N FAULT To-be-discussed

51 400/220 Kv ICT-1 AT SATTENAPLLI 26-02-2015/ 10:19:00

26-02-2015/ 11:30:00

GROUP - A PROTECTION OPERATED To-be-discussed

52 400/220 kV ICT-3 AT GAJWEL 27-02-2015/ 02:32:00

27-02-2015/ 02:53:00

TRIPPE ON MALOPERATION To-be-discussed

53 400 kV HIRIYUR - NELAMANGALA 2 27-02-2015/ 17:19:00

27-02-2015/ 17:21:00

DT RECEIVED AT NLM To-be-discussed


28-02-2015/ 01:19:00

TRIPPED AT GAJUWAKA END ON R-N FAULT

To-be-discussed

55 400 kV NLC EXP- ILFS 28-02-2015/ 19:17:00

28-02-2015/ 20:50:00

TRIPPED AT NLCTS1EXP END To-be-discussed

56 220 Kv CHIKKODI - MUDUSHINGI 01-03-2015/ 03:37:00

BUS DEAD AT MUDUSHINGI END To-be-discussed

57 220 Kv CHIKKODI - TALANDGE 01-03-2015/ 03:37:00

BUS DEAD AT TALANDGE END To-be-discussed

58 220 kV AMBEWADI - PONDA 1 01-03-2015/ 04:21:00

01-03-2015/ 04:57:00

Y - N FAULT To-be-discussed

59 400 Kv COASTAL - NTPL 02-03-2015/ 03:51:00

B - N FAULT To-be-discussed

60 400/220 kV ICT-1 AT TRICHUR 03-03-2015/ 17:02:00

03-03-2015/ 17:54:00

BUS BAR PROTECTION OPERATED AT MADAKATHRA

To-be-discussed

61 400/220 kV ICT-2 AT HOODY 03-03-2015/ 23:44:00

04-03-2015/ 04:27:00

TRIPPED DUE TO OIL SURGE RELAY To-be-discussed

62 400/220 kV ICT-2 AT TRICHUR 03-03-2015/ 17:02:00

03-03-2015/ 17:55:00

BUS BAR PROTECTION OPERATED AT MADAKATHRA

To-be-discussed

63 400/220 kV ICT-3 AT HOODY 03-03-2015/ 23:44:00

04-03-2015/ 03:43:00

BUCCHOLZ RELAY OPERATED To-be-discussed

Annexure-IV

64 400/230 kV ICT-2 AT SALEM 03-03-2015/ 21:30:00

04-03-2015/ 00:17:00

TRIPPED DUE TO RELAY MALOPERATION

To-be-discussed

65 765/400 kV ICT-1 at RAICHUR 03-03-2015/ 12:23:00

03-03-2015/ 13:26:00

TRIPPED To-be-discussed

66 400 Kv RAICHUR PG - GOOTY 1 04-03-2015/ 12:31:00

04-03-2015/ 12:45:00

TRIPPED DUE TO NTAMC WORK To-be-discussed

67 400/230 kV ICT-2 AT SALEM 04-03-2015/ 21:45:00

OIL SURGE RELAY OPERATED To-be-discussed

68 220 kV UPPER SILERU - BALIMELA 04-03-2015/ 08:00:00

LBB OPERATED AT UPPER SILERU To-be-discussed

69 400 Kv SATTENAPALLI - SRISAILAM 2 04-03-2015/ 14:25:00

04-03-2015/ 15:08:00

R-N FAULT To-be-discussed

70 400/230 kV ICT-2 AT SALEM 04-03-2015/ 19:55:00

04-03-2015/ 21:11:00

OIL SURGE RELAY OPERATED To-be-discussed

71 400/220 kV ICT-1 AT MUNIRABAD 08-03-2015/ 19:41:00

08-03-2015/ 20:52:00

DEF OPERATED To-be-discussed

72 400 kV DICHIPALLY - RAMAGUNDAM 09-03-2015/ 00:56:00

B-N FAULT IN ZONE 1 To-be-discussed

73 400/220 kV ICT-2 AT RAICHUR 09-03-2015/ 06:36:00

09-03-2015/ 13:07:00

REASON AWAITED FROM KPTCL / RCR

To-be-discussed

74 400/220 kV ICT-2 AT MAHABOOB NAGAR 09-03-2015/ 07:57:00

09-03-2015/ 19:16:00

RESTRICTED EARTH FAULT To-be-discussed

75 400 kV MAHABOOB NAGAR - RAICHUR 09-03-2015/ 06:36:00

09-03-2015/ 07:55:00


To-be-discussed

76 400 Kv RAICHUR - RAICHUR PG 1 09-03-2015/ 06:36:00

09-03-2015/ 08:18:00


To-be-discussed

77 400 Kv RAICHUR - RAICHUR PG 2 09-03-2015/ 06:36:00

09-03-2015/ 08:02:00


To-be-discussed

78 400 kV MADURAI - PUGALUR 1 10-03-2015/ 19:18:00

10-03-2015/ 20:20:00

TRIPPED AT PGLR END DUE TO MAIN CB FAILURE ALARM

To-be-discussed

Annexure-IV

SOUTHERN REGIONAL POWER COMMITTEE

BENGALURU

Additional Agenda for the 42nd

meeting of Protection Coordination Sub-Committee

of SRPC to be held on 26.03.2015

1. Grid Occurrences (ref: SRLDC)

The additional Grid Occurrences to be discussed in the meeting are enclosed at Annexure –V.

2. Non- furnishing of Tripping Details

The members were intimated about non- furnishing of tripping details for the grid incidents that

occurred during the period 1-15 March, 2015 vide SRPC letter dated 17.03.2015 (Annexure-VI).

The issue would be discussed in the meeting. X -------------------------------- X --------------------------------- X

Additional Grid Occurrences

1. / - Details of Grid incidents:

Sr. No.

.

.

/

Details of Event

/ Date &


/Remarks

/ Category

1

Tripping of HVDC pole-1&2 at Gazuwaka and 400kV 400kV Jeypore Gajuwaka line -1

14-03-2015 at 17:12 hrs

HVDC Pole-1 at Gazuwaka

tripped due to tripping of filter

banks and Pole-2 tripped due to

operation of differential

protection. 400kV Jeypore-

Gazuwaka line-1 tripped on over-

voltage from Gazuwaka end.

--

2 Tripping of HVDC Bhadravathi Pole-1

18-03-2015 at 13:55 hrs

Pole tripped due to failure of auxiliary supply

2. Failure or non-operation of Auto reclose during transient fault

Sr. No.

Element Date & Time

Reason

1 Tripping of 220kV Yerandahalli-Hosur line

18-03-2015 at 13:12 hrs

B-N fault. Line did not auto-reclose

2

Tripping of NCTPS-Vallur line-1 17-03-2015 at 3:00hrs

Y-N fault. Line did not auto-reclose

3. Mal-operation/ Non-operation of PLCC

Sr. No.

Element Date & Time

Reason

1 Tripping of 400kV Thiruvelam-Kalivandapattu line-1

17-03-2015 at 18:05 hrs

Line tripped at Kalivandapattu end only

2 Tripping of 220kV Neyveli-Villanur 18-03-2015 at

11:57 hrs R-N fault in Line. Fault observed for 400ms in Neyveli end D.R

Annexure-V

Annexure-VI

southern regional power committee - karnataka · 2015-03-30 · southern regional power committee...

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