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.
Agenda for the 42nd Protection Coordination Sub Committee Meeting to be held on 26.03.2015 Page 3
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).
Agenda for the 42nd Protection Coordination Sub Committee Meeting to be held on 26.03.2015 Page 4
(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.
*******
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 &
मय /Time / Reason
/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 &
मय /Time / Reason
/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 &
मय /Time / Reason
/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
Line did not auto reclose
Annexure-I
Annexure-II
Annexure-II
Annexure-II
Annexure-II
Annexure-II
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.
Line did not auto reclose
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.
KPTCL Yet to be informed Pending
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.
KPTCL Yet to be informed Pending
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.
KPTCL Yet to be informed Pending
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.
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
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.
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
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.
PGCIL Yet to be informed Pending
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 Yet to be informed Pending
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
Yet to be informed. Pending.
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
Yet to be informed. Pending.
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
PLCC MALOPERATION To-be-discussed
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
SOUTHERN ORISSA DISTURBANCE To-be-discussed
18 400 kV JEYPORE - GAZUWAKA 2 10-02-2015/ 16:24:00
10-02-2015/ 20:20:00
SOUTHERN ORISSA DISTURBANCE To-be-discussed
19 HVDC GAJUWAKA POLE 1 10-02-2015/ 16:24:00
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
DISTANCE PROTECTION To-be-discussed
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
DISTANCE PROTECTION To-be-discussed
30 400 kV MUNIRABAD - GUTTUR 18-02-2015/ 07:40:00
18-02-2015/ 12:44:00
B-N FAULT To-be-discussed
Annexure-IV
31 400 kV GHANAPUR - MAMIDIPALLY 18-02-2015/ 12:12:00
18-02-2015/ 12:12:00
PLCC MALOPERATION To-be-discussed
32 400 kV KHAMMAM - KALPAKKA 1 18-02-2015/ 12:58:00
18-02-2015/ 14:28:00
PLCC MALOPERATION To-be-discussed
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
PLCC MALOPERATION To-be-discussed
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
B-N FAULT To-be-discussed
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
DISTANCE PROTECTION ACTED To-be-discussed
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
44 400 kV JEYPORE - GAZUWAKA 2 23-02-2015/ 13:34:00
23-02-2015/ 21:46:00
DT RECIEVED FROM JEYPORE To-be-discussed
45 HVDC GAJUWAKA POLE 2 23-02-2015/ 13:34:00
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
DISTANCE PROTECTION ACTED To-be-discussed
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
54 400 kV JEYPORE - GAZUWAKA 1 28-02-2015/ 00:19:00
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
REASON AWAITED FROM KPTCL / RCR
To-be-discussed
76 400 Kv RAICHUR - RAICHUR PG 1 09-03-2015/ 06:36:00
09-03-2015/ 08:18:00
REASON AWAITED FROM KPTCL / RCR
To-be-discussed
77 400 Kv RAICHUR - RAICHUR PG 2 09-03-2015/ 06:36:00
09-03-2015/ 08:02:00
REASON AWAITED FROM KPTCL / RCR
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 &
मय /Time / Reason
/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
Annexure-VI
Annexure-VI
Annexure-VI
Annexure-VI
Annexure-VI