MOM of OCC meeting dt. 07.07.15
Page 1 of 14
DELHI TRANSCO LIMITED (Regd. Office: Shakti Sadan, Kotla Road, New Delhi-110002)
Office of Dy. Gen. Mgr. (OS & Lines) 220KV S/Stn. Bldg. Naraina, New Delhi-110010
Tele: 25683304
MINUTES OF THE OCC MEETING DT. 07.07.2015
ED(Tech) O&M-I, DTL, Chairman-Delhi OCC welcomed all the members of OCC and
distinguished guests to the meeting.
List of participants is enclosed.
The point-wised deliberations made during the meeting are as below:
1.0 Confirmation of minutes of OCC meeting dtd. 08.06.2015
Last OCC meeting was held on 08.06.15 in accordance with the agenda circulated vide letter
dt.05.06.15. Minutes of the aforesaid OCC meeting were issued vide letter dated 12.06.2015. No
comments were received.
Members confirmed the same.
2.1 Status of Installation of Capacitors – Study by Planning Deptt., DTL
DTL had entrusted CPRI to study the installation of shunt capacitors in Delhi system on the
advice of OCC. Accordingly CPRI carried out the study for reactive power compensation in
Delhi. Final report was submitted by CPRI and for its implementation; a copy of report had been
emailed to all DISCOMs and GENCOs. SLDC convened a meeting with DISCOMs on dt.
18.02.15 to discuss on the Reactive Power Study report submitted by CPRI.
Planning department, DTL informed that comments from BRPL, TPDDL and BYPL have been
received. Comments from NDMC have not yet been received even after repetitive reminders.
NDMC could not attend the meeting. OCC advised NDMC member to attend the meeting
regularly and offer their comments within a week time to Planning and SLDC department of
DTL.
(Action by NDMC)
2.2 Status of Hot Reserve of transformers at all levels.
DTL updated the status of following hot reserves:
S.
No Capacity
Present
population
in nos.
Status of the hot reserve as on 09.07.15
1. 220/66kV, 18 DTL informed the work has been awarded to M/s
MOM of OCC meeting dt. 07.07.15
Page 2 of 14
160MVA Tx Kanohar. Completion period is 5 months from date of
award of work i.e. by the end of September, 2015.
2. 220/66kV,
100MVA Tx
41 DTL informed that indent has been sent for 220/66/33kV
100MVA Tx as hot reserve at 220kV Patparganj
Substation. 3. 220/33kV,
100MVA Tx,
36
OCC advised DTL to expedite the work.
(Action by DTL)
2.3 Long/Recent outage of Elements in Delhi power system as on 03.07.2015 at 08:00 Hrs.
Members updated the status of Long/Recent outage of Elements in Delhi Power system as
below: S.
No. Element’s Name
DISCOM/D
TL
Date and Time of
outage
Remarks/ Status as on
07.07.2015
1
33kV BAY -3 (IP – Kilokri) BRPL 22.02.11
Clearance from Railways for
laying of Underground cables
near Bhairon Road is pending.
DTL informed that railways has
issued the order for carrying
maintenance work along railway
lines without any charges and
advised BRPL to take up with
railways for revival of circuit.
2 66kV Vasant Kunj – Ridge Valley Ckt.-II (‘Y’
Ph. Cable) BRPL 13.01.14
BRPL informed that contract is
to be awarded for laying new
cable.
3 33kV Kilokri – Jamia CKT. (‘R’ & ‘B’ Ph.
Cable)
BRPL 15.03.14 Expected by 30.08.15
4. 33kV RIDGE VALLEY - KHEBAR LINE
CKT.-I
BRPL 08.02.15
Y-PH. Cable and breaker faulty
(Single Cable). Expected by
30.08.15
5. 66kV V.KUNJ - PALAM CKT. BRPL 13.06.15 Y-PH. Spare Cable faulty.
Energized on 17.06.15.
6. 33kV OKHLA (220kV)-ALAKHNANDA
CKT.-I BRPL 29.06.15
'R' and 'B' Phase Single Cable
faulty. Energized on 05.07.15
7. 66kV G-5 MATIALA - DELHI JAL BOARD
CKT.-II BRPL 12.06.15
Y-PH. Cable faulty. Expected by
31.07.15
8. 66kV PPG INDL. AREA - KHICHRIPUR
CKT.-II BYPL 03.05.15
R phase Cable faulty. Expected
by 08.08.15
9. 66kV GH-II - GH-I CKT-I
BYPL 17.06.15 Cable faulty. Expected by
20.07.15
10. 66kV WAZIRABAD - GONDA CKT.-I
BYPL 29.06.15 Cable faulty. Expected by
20.07.15
11. 33kV VIDYUT BHAWAN - SCHOOL LANE
CKT. NDMC 14.05.15
Y-Phase faulty. Expected by
20.07.15
MOM of OCC meeting dt. 07.07.15
Page 3 of 14
12. 66kV GT- VIDYUT BHAWAN CKT.-II
NDMC 18.06.15 Cable faulty. Energized on
20.06.15
13. 33kV GT-SCHOOL LANE CKT.-I
NDMC 02.07.15 R-Phase faulty. Expected by
08.07.15
14. 220kV MAHARANI BAGH - ELECTRIC
LANE CKT.-II DTL 17.04.15
Cable faulty during digging by
MTNL. Expected by the end of
July, 2015
15. 400kV BAMNAULI - JHATIKARA CKT.-I DTL 27.05.15 Joint Box burnt. Expected by
15th August, 2015
OCC advised members to expedite the work of attending faulty feeders/ equipments.
(Action by DTL, BRPL, BYPL and NDMC)
2.4 Phasing out of 66/33kV, 30MVA Power Transformer at 220kV Narela Substation.
DTL informed that the said transformer is currently being utilized for feeding only 01 No. 33kV
Circuit i.e. Khampur of TPDDL since 2010. 2nd
feeder namely Haiderpur is under B/D since long
time. Due to shortage of space in 66KV yard, the transformer is on single bus selection and the
same needs to be switched ‘OFF’ during bus maintenance activities. Further, the transformer is
placed adjacent to 20MVAR capacitor bank and thereby always remains in risk of fire during
failure of any capacitor unit / cell.
In addition the 33KV yard construction is of vertical pole mounted type with single bus and
maintenance works are thus quite difficult to carry out. The necessary clearances of 33KV yard
have also not been maintained, as the construction is just touching the Control Room building.
The transformer has already lived its useful life period of 25 years successfully as per DERC
guidelines and is now under outlived condition.
In view of all above, DTL’s proposal for phasing out of 30MVA, 66/33KV power transformer
along with 33KV yard equipments has been initiated in the year 2010. The case has been
examined / approved by the Planning Deptt. and put up in OCC accordingly. OCC recommended
for consideration of the matter in Streeing Committee, in which approval has also been provided
for shifting of 33KV load from Narela end by TPDDL.
The subjected transformer has developing acetylene gas during DGA testing, the concentration
of which is increasing day by day which indicates some internal high temperature fault. The
overhauling / internal inspection of transformer at this stage is not economically feasible (being
outlived) and the same may be required to be taken out of service at any time.
Accordingly, DTL proposed for phasing out of 30MVA, 66/33KV power transformer along with
33KV yard equipments at 220KV S/Stn. Narela on priority basis, by directing TPDDL for
immediate shifting of 33KV load from Narela end.
TPDDL informed that there is alternative feed for khampur is available; however the same is not
reliable.
During the meeting dt. 08.06.15, OCC advised DTL to carry out internal inspection and
dehydration of the transformer and outage for the same shall be provided by TPDDL.
MOM of OCC meeting dt. 07.07.15
Page 4 of 14
DTL informed that the internal inspection by BHEL i.e. OEM is being planned during the end of
August, 2015.
OCC advised TPDDL to witness the internal inspection.
(Action by DTL, TPDDL)
2.5 Strengthening of Earthing of 66kV Cables emanating from 220kV PPK-II substation.
DTL informed that at 220kV Sub Station PPK-II, 66kV Out going cables are with BRPL and the
earthing of these cables are very degraded position. Due to this, at the time of any fault in 11kV
System of BSES, 66kV Yard equipments at PPK-II substation are being affected.
Recently on dt.23.05.2015, 66kV Dwarka G-15 Ckt.-I tripped with heavy jerk (tripping might be
due to weak earthing) because of which, 66kV Line Isolator (B phase) at 220kV PPK-II yard got
damaged.
BRPL informed that their team visited the PPK-II substation and needful done in the presence of
DTL official.
2.6 Back feed & RMU provision for 11 kV feeders by TPDDL at 220 kV Substation
Kanjhawala
220 kV Substation Kanjhawla has 9 Nos. of 11 kV feeders feeding to TPDDL. Out of these 9
feeders, 04 No. feeders i.e Ghewara, SOS Bawana, JJ cluster, ABC Kanjhawala does not have
back feed by any other TPDDL grid. These feeders feed to the area nearby Kanjhawala S/Stn
and outage of these lines for any reason result in gathering of miscreants /local public at the
substation demanding for total black out.
Further, several areas of TPDDL are fed without RMU through auto reclose system i.e directly
from DTL which results in numerous tripping at Kanjhawala sub-station. One such feeder is
11kV Ghewara.
In this regard, DTL requested TPDDL to make arrangement in line with DERC guidelines for
back-feeding of the said 4 feeders to avoid any unwanted situation and to safeguard DTL system
for any fault at TPDDL end
The issue got deliberated and OCC advised TPDDL and DTL to have joint inspection visiting
TPDDL’s first switching substations to check protection system and back-feeding provision.
(Action by Protection deptt. of DTL, TPDDL)
MOM of OCC meeting dt. 07.07.15
Page 5 of 14
3.1 Issue of supply restoration on 66 KV O/G feeders from Harsh Vihar grid
BYPL have 4 nos. 66 KV feeders from 400/220/66 KV Harsh Vihar grid station. In case of
tripping of any of the feeders, the restoration process is very difficult and complex. There is no
arrangement for PT isolation at Harsh Vihar end, hence high voltage testing of feeders is not
possible. The only way is to call the OEM and get the cable ends isolated from the GIS panels
and test thereafter. This involves lot of efforts, time and cost. In summer months when there will
be no/little margin available on alternate sources, this unwanted delay may lead to large scale
load shedding in parts of east Delhi.
BYPL informed that they have already written couple of times to DTL with the request to
address this issue on priority, but we are still waiting for a response from DTL. Therefore, it is
requested to make suitable arrangement to test the feeders at DTL end to avoid any unwanted
delay in restoration of feeder and thereby any load shedding in the area.
During the OCC meeting dt. 11.05.15, OCC advised BYPL and DTL to have joint inspection at
the substation for looking into the feasibility of testing.
The following members from DTL have been nominated for the said inspection:
1. Hitesh Kumar, Manager (T)-Protection
2. Mukesh Rana, Manager(T)-400kV Harsh Vihar
66kV/33kV Cable testing procedure for FLC and energizing shall be conveyed to BYPL. From
BYPL, officers from Protection department and Maintenance department have been nominated
for the said inspection.
DTL informed that there is no provision for isolating the line PT without de-gassing the GIS
chamber which is very exhaustive and time consuming process. Hence, as there is no alternative
except taking out the cable from the GIS end for any testing purpose. Otherwise, BYPL should
arrange an isolator outside GIS premises of Harsh VIihar S/Stn. for isolation of cable for testing.
(Action by BYPL, DTL)
4.0 Proposed Shutdowns
4.1 Proposed shutdown at 220kV Kashmere Gate.
The following shutdown proposed by DTL at 220kV Kashmere Gate S/S has already been
availed on the proposed date i.e. 03.07.15:
S.
No.
Proposed Date &
time of S/D
Name of the feeder /
equipment
Work to be carried out
1
03.07.15 (07:00Hrs.
to 10:00Hrs.)
33kV Civil Line Ckt-II Drying of SF6 gas in feeder compartment of 33kV Civil
Line II Feeder bay by GIS Expert team as ppmw of SF6
gas is high
MOM of OCC meeting dt. 07.07.15
Page 6 of 14
4.2 Proposed shutdown at 220kV Pappankalan-I.
OCC approved the following shutdowns proposed by DTL at 220kV Pappankalan-I S/S:
S.
No.
Proposed Date &
time of S/D
Name of the feeder /
equipment
Work to be carried out
Approved Date & time
of S/D
1 03.07.15 (06:30Hrs.
to 09:30Hrs.)
66kV Bus Coupler
along with Bus-I
To attend hot points on Y-phase
isolator Bus-I side
Already availed
2 04.07.15 (06:30Hrs.
to 09:30Hrs.)
66kV Rewari Line To replace Spring Charge Motor and
Gen. Mtc.
12.07.15 (06:30Hrs. to
09:30Hrs.)
(Action by DTL)
4.3 Proposed shutdown at 220kV Gopalpur.
OCC approved the following shutdowns proposed by DTL at 220kV Gopalpur S/S:
S.
No.
Proposed
Date & time
of S/D
Name of the
feeder /
equipment
Work to be carried out
Remarks
Approved Date
& time of S/D
1
06.07.2015(06
AM to 11AM)
33kV Indira
Vihar ckt.-I
For attending hotpoints at B
phase jackbus Dropdown
conductor & line isolator
alignment
The load may please be
transfer at 33kV Indira
Vihar ckt.-II
Already availed
2
10.07.2015(06
AM to 11AM)
33kV DIFR ckt. For attending hotpoint at Y
phase line isolator clamp CT
side.
The load may please be
transfer at 33kV Civil
Line ckt.
10.07.2015(06
AM to 11AM)
3
15.07.2015(06
AM to 10AM)
33kV Wazirabad
ckt.-II
For attending hotpoint at
33kV Y phase CT clamp
towards line isolator.
The load may please be
transfer at 33kV
Wazirabad ckt.-I
15.07.2015(06
AM to 10AM)
4
19.07.2015(06
AM to 11AM)
33kV Indira
Vihar ckt.-II
For doing line isolator
alignment
The load may please be
transfer 33kV Indira
vihar ckt.-I
19.07.2015(06
AM to 11AM)
5
24.07.2015(06
AM to 9AM)
33kV Civil Line
Ckt.
For doing general
maintenance work
The load may please be
transfer at 33kV DIFR
ckt.
24.07.2015(06
AM to 9AM)
6
26.07.2015(06
AM to 11AM)
33kV Wazirabad
ckt.-I
For line isolator alignment
and general maintenance
work.
The load may please be
shifted t 33kV
Wazirabad ckt.-II.
26.07.2015(06
AM to 11AM)
(Action by DTL)
4.4 Proposed shutdown at 220kV Okhla.
OCC approved the following shutdowns proposed by DTL at 220kV Okhla S/S:
S.
No.
Proposed
Date & time
of S/D
Name of the feeder /
equipment
Work to be carried
out
Remarks
Approved
Date & time
of S/D
1
11.07.2015
(08:00Hrs to
17:00Hrs.)
100 MVA, 220/66/11
KV Power Transformer
No. I along with I/c No-
Replacement of 220
KV Bushing of B-
Phase (Having high
Load to be taken on
220/66/11 KV Power
Transformer No. II. Excess
11.07.2015
(06:00Hrs to
11:00Hrs.)
MOM of OCC meeting dt. 07.07.15
Page 7 of 14
I Tan delta) load if any, to be managed
by BRPL.
2
12.07.2015
(08:00Hrs to
12:30Hrs.)
33 KV East of Kailash
along with 33 KV Bus-
II and 33 KV I/c-III &
IV
Earthing of Bus &
line isolator
Load to be managed by
BRPL.
12.07.2015
(06:00Hrs to
12:00Hrs.)
3
12.07.2015
(13:00Hrs to
17:30Hrs.)
33 KV Alaknanda Ckt-I
along with 33 KV Bus-
II and 33 KV I/c-III &
IV
Load will be taken on
Alaknanda Ckt-II Excess
load, if any, to be managed
by BRPL.
4
13.07.2015
(09:30Hrs to
17:30Hrs.)
100 MVA, 220/33/11
KV Power Transformer
No. V and 33 KV I/c-V
Work to be done by
OEM, i.e. M/s CGL
for replacement of
PRV stud, Seal in
relay of SPR,
Mounting of PRV
support pipes and
Remote TPI.
Load to be taken on
220/33/11 KV Power
Transformer No. III and IV.
13.07.2015
(06:00Hrs to
11:00Hrs.)
5
13.07.2015
(09:30Hrs to
14:00Hrs.)
33 KV Alaknanda Ckt-
II along with 33 KV
Bus-I and 33 KV I/c-V
Earthing of Bus &
line isolator
Load will be taken on
Alaknanda Ckt-I Excess
load, if any, to be managed
by BRPL.
13.07.2015
(06:00Hrs to
11:00Hrs.)
6
14.07.2015
(09:30Hrs to
14:00Hrs.)
33 KV Okhla Ph-II
Ckt-I
Earthing of Bus &
line isolator
Load will be taken on Okhla
Ph-II, Ckt-II. Excess load,
if any, to be managed by
BRPL.
Already
availed
7
15.07.2015
(09:30Hrs to
14:00Hrs.)
33 KV Okhla Ph-II
Ckt-II
Earthing of Bus &
line isolator
Load will be taken on Okhla
Ph-II, Ckt-I. Excess load, if
any, to be managed by
BRPL.
Already
availed
8
16.07.2015
(09:30Hrs to
14:00Hrs.)
33 KV Balaji Ckt-II Earthing of Bus &
line isolator
Load will be taken on 33
KV Balaji Ckt-I. Excess
load, if any, to be managed
by BRPL.
16.07.2015
(06:00Hrs to
11:00Hrs.)
9
17.07.2015
(09:30Hrs to
14:00Hrs.)
33 KV i/c-III along
with 100 MVA,
220/33/11 KV Power
Transformer No.III
Earthing of Bus &
line isolator
Load to be taken on
220/33/11 KV Power
Transformer No. IV and V.
17.07.2015
(06:00Hrs to
11:00Hrs.)
10
18.07.2015
(09:30Hrs to
14:00Hrs.)
33 KV i/c-IV along
with 100 MVA,
220/33/11 KV Power
Transformer No.IV
Earthing of Bus &
line isolator
Load to be taken on
220/33/11 KV Power
Transformer No. III and V.
18.07.2015
(06:00Hrs to
11:00Hrs.)
11
20.07.2015
(09:30Hrs to
14:00Hrs.)
33 KV i/c-V along with
100 MVA, 220/33/11
KV Power Transformer
No.V
Earthing of Bus &
line isolator
Load to be taken on
220/33/11 KV Power
Transformer No. III and IV.
20.07.2015
(06:00Hrs to
11:00Hrs.)
12
21.07.2015
(09:30Hrs to
14:00Hrs.)
33 KV Tughlakabad Earthing of Bus &
line isolator
Load to be managed by
BRPL.
19.07.2015
(06:00Hrs to
11:00Hrs.)
13
22.07.2015
(09:30Hrs to
14:00Hrs.)
33 KV Capacitor Bank Earthing of Bus &
line isolator
22.07.2015
(09:30Hrs to
14:00Hrs.)
(Action by DTL)
MOM of OCC meeting dt. 07.07.15
Page 8 of 14
4.5 Proposed shutdown at 400kV Bamnauli Substation.
OCC approved the following shutdowns proposed by DTL at 400kV Bamnauli S/S:
S.
No. Proposed Date & time of S/D
Name of the feeder /
equipment
Work to be carried
out
Approved Date & time of S/D
1 28.07.15(06:00hrs to 11:00hrs) 220 KV DIAL-Ckt-1 CT &CVT Tan delta
testing and general
maintenance work.
05.08.15(06:00hrs to 11:00hrs)
2 29.07.15(06:00hrs to 11:00hrs) 220 KV DIAL-Ckt-2 06.08.15(06:00hrs to 11:00hrs)
3 30.07.15(06:00hrs to 11:00hrs) 220 KV PPK1 CKT2 16.08.15(06:00hrs to 11:00hrs)
(Action by DTL)
4.6 Proposed shutdown at 400kV Tikri Kalan Substation.
OCC approved the following shutdowns proposed by DTL at 400kV Tikri Kalan S/S:
S.
No.
Proposed Date &
time of S/D
Name of the feeder / equipment
Work to be carried out
Approved Date &
time of S/D
1 10.07.15(8:00Hrs. to
12:00Hrs.)
160MVA Tr. No.3 (Bay no. 213,
along with 66kV I/c-3) For preventive mtc work
10.07.15(8:00Hrs. to
12:00Hrs.)
2 09.07.15 (9:30Hrs.
to 12:00Hrs.)
220kV Bus Section 210A & 210B For rectification of faulty
configuration with M/s
Schneider Engineer
09.07.15 (9:30Hrs. to
12:00Hrs.)
3 09.07.15(13:30Hrs.
to 17:30Hrs.)
66kV Bus Section 615A & 615B 09.07.15(13:30Hrs. to
17:30Hrs.)
(Action by DTL)
5.0 Additional agenda points with the permission of the Chair.
5.1 Proposed shutdown at 220kV Sarita Vihar Substation.
OCC approved the following shutdowns proposed by DTL at 220kV Sarita Vihar S/S:
S.
No.
Proposed
date & time
of s/d
Name of the
feeder /
equipment
Work to be carried out
Remarks Approved
date & time
of s/d
1
10.07.15
(06:00 hrs to
13:00 hrs)
220 kV
B.T.P.S. Ckt –
I along with
220kvbus - I
To attend minor oil leakage of Y&B
ph. CTs, hot spots and to conduct
c&tan- delta test of line CVTs & CTs
and bus – I CVTs as per pms
Load to be taken on
B.T.P.S. Ckt –II&
pragati ckt-I.
10.07.15
(06:00 hrs to
11:00 hrs)
2
12.07.15
(06:00 hrs to
15:00 hrs)
100 MVA Tx -
II
To attend the oil leakages from oil
pumps, carrying out CFT test,
insulation resistance (IR), voltage
ratio, magnetizing current &
magnetizing balance test on
transformer as per pms
Load to be taken on 100
MVA tx –I. Excess load,
if any, to be managed by
bses.
12.07.15
(06:00 hrs to
11:00 hrs)
3
13.07.15
(06:00 hrs to
13:00 hrs)
220 kV
B.T.P.S. Ckt –
II along with
220kv bus - II
To attend oil leakage from CTs, red
hot spots of isolators and to conduct
c&tan- delta test of line CVTs & CTs
and bus – I CVTs as per pms
Load to be taken on
BTPS Ckt –I & pragati
ckt-I.
13.07.15
(06:00 hrs to
11:00 hrs)
MOM of OCC meeting dt. 07.07.15
Page 9 of 14
4
10.07.15
(14:00 hrs to
17:00 hrs)
66 kV DMRC
ckt – I
For attending various red hot spots
and to conduct C & tan- delta test of
line CVTs & CTs as per pms
Load to be taken on
DMRC ckt –II. Excess
load, if any, to be
managed by DMRC. 17.07.15
(00:00 hrs to
05:30 hrs) one
after one ckt. 5
13.07.15
(14:00 hrs to
17:00 hrs)
66 kV DMRC
ckt - II
To attend red hot spots and
conducting c&tan- delta test of line
CVTs & CTs as per pms
Load to be taken on
DMRC Ckt –II. Excess
load, if any, to be
managed by DMRC.
6
14.07.15(06:
00 hrs to
10:00 hrs)
66 kv mathura
road ckt -II
To attend various red hot spots of
CTs, CBs and line isolator and
conducting C& tan- delta test of line
CVTs & CTs as per pms
Load to be taken on
mathura road ckt -I .
Excess load, if any, to be
managed by bses.
14.07.15(06:00
hrs to 10:00
hrs)
7
14.07.15
(10:00 hrs to
13:00 hrs)
220 kV bus-
coupler
To attend the red hot spots and
conducting c& tan- delta test of CTs
as per pms
Nil 14.07.15
(10:00 hrs to
13:00 hrs)
8
15.07.15(06:
00 hrs to
15:00 hrs)
100 MVA Tx -
I
To attend the various red hot spots,
oil leakages from oil pumps and
carrying out CFT test, IR, Voltage
ratio, magnetizing current &
magnetizing balance test on
transformer as per pms
Load to be taken on 100
MVA Tx –II. Excess
load, if any, to be
managed by bses.
15.07.15(06:00
hrs to 11:00
hrs)
(Action by DTL)
5.2 Proposed shutdown at 220kV Narela.
OCC approved the following shutdowns proposed by DTL at 220kV Narela S/S:
S.
No.
Proposed Date &
time of S/D
Name of the feeder /
equipment
Work to be
carried out
Remarks Approved Date
& time of S/D
1 05.07.15 (06:00 to
11:00 Hrs.) 66KV Cap. Bank No.- II
To check &
attend Hot-
Spot
observed
during
Thermo-
scanning.
NIL Already availed
2 08.07.15 (06:00 to
12:00 Hrs.)
100MVA Trf. No.- II along
with 66KV I/C No.- II
Load will be shifted on
100MVA Trf. Nos.- I & III
08.07.15 (06:00
to 12:00 Hrs.)
3 11.07.15 (06:00 to
12:00 Hrs.) 220KV PANIPAT CKT.- II
Load will be shifted by
BBMB.
11.07.15 (06:00
to 12:00 Hrs.)
4 13.07.15 (06:00 to
11:00 Hrs.)
220KV DSIIDC BWN CKT.-
I
Load will be shifted on
220KV MANDOLA
CKTS.- I & II
13.07.15 (06:00
to 11:00 Hrs.)
5 15.07.15 (06:00 to
14:00 Hrs.)
220KV ROHTAK ROAD- II
ALONG WITH 220KV
BUS-II
Load will be shifted by
BBMB.
15.07.15 (06:00
to 14:00 Hrs.)
6 18.07.15 (06:00 to
12:00 Hrs.)
100MVA Trf. No.- I along
with 66KV I/C No.- I
Load will be shifted on
100MVA Trf. Nos.- II &
III
18.07.15 (06:00
to 12:00 Hrs.)
7 20.07.15 (06:00 to
10:00 Hrs.) 66KV BHALSWA CKT.- I
Load will be shifted by
TPDDL.
20.07.15 (06:00
to 10:00 Hrs.)
8 22.07.15 (06:00 to
14:00 Hrs.)
220KV ROHTAK ROAD- I
ALONG WITH 220KV
BUS-II
Load will be shifted by
BBMB.
22.07.15 (06:00
to 14:00 Hrs.)
9 25.07.15 (06:00 to
12:00 Hrs.) 220KV PANIPAT CKT.- I
Load will be shifted by
BBMB.
25.07.15 (06:00
to 12:00 Hrs.)
MOM of OCC meeting dt. 07.07.15
Page 10 of 14
10 27.07.15 (06:00 to
10:00 Hrs.)
100MVA Trf. No.- III along
with 66KV I/C No.- III
To check &
attend Hot-
Spot
observed
during
Thermo-
scanning.
Load will be shifted on
100MVA Trf. Nos.- I & II
27.07.15 (06:00
to 10:00 Hrs.)
11 29.07.15 (06:00 to
12:00 Hrs.) 220KV PANIPAT CKT.- III
Load will be shifted by
BBMB.
29.07.15 (06:00
to 12:00 Hrs.)
(Action by DTL)
5.3 Proposed shutdown at 400kV Bawana.
OCC approved the following shutdowns proposed by DTL at 400kV Bawana S/S:
S.
No.
Proposed
Date & time
of S/D
Name of the
feeder /
equipment
Work to be carried out
Remarks
Approved Date
& time of S/D
1
08.07.2015
(07.30Hrs to
13:00 Hrs)
315 MVA ,
400/220/33kV,
Transformer-3
To attend hot spot on Y & B
phase LV Bushing(Tem. 125)
No load will be affected
Load shall be shared on
ICT-1,2 4,5&6
08.07.2015
(07.30Hrs to
13:00 Hrs)
2
09.07.2015
(07.30Hrs to
13:00 Hrs)
315 MVA ,
400/220/33kV,
Transformer-4
To attend hot spot on 422-89 B
Isolator R & Y Phase dropper
jumper(Tem 115) ICT-4 side and
1489 L isolator
No load will be affected
Load shall be shared on
ICT-1,2 ,3,5&6
09.07.2015
(07.30Hrs to
13:00 Hrs)
3
11.07.2015
(07.30Hrs to
13:00 Hrs)
100MVA
Transformer
To attend hot spot on Bushing
clamp LV side R phase & 66kv
Incomer Isolator clamp R phase
CT side (Tem. 108)
Load will be meet through
220kv Kanjhwala Circuit
11.07.2015
(07.30Hrs to
13:00 Hrs)
4
13.07.2015
(07.30Hrs to
13:00 Hrs)
220kV SMB-II To attend hot spot on CT( B
Phase Temp 63), CB ( R Ph Temp
59& line Isolator Clamp( B Ph
Temp 95) & Bus - I Isolator
Clamp( R ph Temp 54)
Load will be meet through
220kv Shalimar Bagh-1
13.07.2015
(07.00Hrs to
11:00 Hrs)
5
14.07.2015
(07.30Hrs to
13:00 Hrs)
315 MVA ,
400/220/33kV,
Transformer-1
To attend hot spot on Y & B
phase LV Bushing(Tem. 98)
&420-89 B isolator R phase
dropper jumper
No load will be affected
Load shall be shared on
ICT-2 3,4,5&6
14.07.2015
(07.30Hrs to
13:00 Hrs)
6
15.07.2015 315 MVA ,
400/220/33kV,
Transformer-2
To attend hot spot on B phase
LV Bushing(Tem. 75)
No load will be affected
Load shall be shared on
ICT-1 3,4,5&6
15.07.2015
(Action by DTL)
MOM of OCC meeting dt. 07.07.15
Page 11 of 14
5.4 Proposed Shutdowns by Lines department, DTL.
OCC approved the following shutdowns proposed by DTL Lines division:
S.
No.
Proposed Date &
time of S/D
Name of the feeder /
equipment
Work to be carried out
Approved Date & time of S/D
1
10.07.15 & 11.07.15
daily basis (08:00
Hrs to 10:00Hrs.)
33kV Khyber Place
Ckt-I&II
S/D required for carrying
HTLS reconductoring work on
220kV Bamnuali-Naraina Ckts.
10.07.15 & 11.07.15 daily basis
(08:00 Hrs to 10:00Hrs.)
subject to approval by MES
2 12.07.15 (08:00 to
14:00Hrs.)
220kV SOW-Mandola
Ckt-III
To attend hot points on the line 12.07.15 (08:00 to 14:00Hrs.)
(Action by DTL)
5.5 Non-Reliable Supply from Dedicated Connection at DTL, 220KV GIS Sub-Station
Maharani Bagh under MLHT category.
DTL informed that due to frequent failure of supply from O/H feeder at 220kV S/Stn. Maharani
Bagh and to resolve the power Supply problem at this station, it was decided to get uninterrupted
power supply through dedicated connection from BSES. Accordingly, payment of Rs.
15089353/- was made by SSC-II Division DTL to BSES Rajdhani Power Ltd. in April 2009 for
providing 11 KV double connection under MLHT category at 220KV GIS S/Stn. Maharani
Bagh, i.e. one supply from the available O/H 11KV line and other one dedicated supply direct
from Kilokari Grid.
Dedicated supply connection from Kilokari Grid via CNG filling station Sarai Kale Khan was
completed by BRPL in 2013, but un-interrupted power supply from this dedicated feeder (U/g
cable) could not be achieved as supply failed 118 times (78Hrs.) during the period from April
2013 – March 2014, 87 times (505 Hrs.) during the period April 2014- March 2015 and 22 times
(14 Hrs.) from April 2015-till date. A lot of jerks & voltage Fluctuations were also been
observed and it is not good for smooth functioning of auxiliary system of the substation and very
importantly the S/Stn. data which needs to be send to SLDC, Minto Road for real time data
monitoring also gets effected.
DTL further informed the selection of HT switchgear of 11KV feeder and back feeding of O/H
feeder / underground cable feeder from 11KV HT switchgear at Maharani Bagh S/Stn. are being
frequently made by BSES staff as per their requirement.
DTL requested that the intent of 11KV dedicated supply connection may be completed by
providing the supply direct from Kilokari Grid to Maharani Bagh Substation without
tapping/termination from this dedicated feeder to avoid any disturbances due to frequent failure
of LT supply.
BRPL informed that they shall look into the issue and revert back in next OCC meeting.
However, a formal request for dedicated supply is required from DTL.
(Action by BRPL, DTL)
MOM of OCC meeting dt. 07.07.15
Page 12 of 14
5.6 Proposed Shutdowns at 220kV Patparganj S/S.
OCC deferred the following shutdowns proposed by DTL at 220kV Patparganj S/Stn. To
next OCC meeting:
S.
No.
Proposed Date & time
of S/D
Name of the feeder / equipment
Work to be carried out
1 11.07.15 09:00Hrs to
15.07.15 17:00Hrs
100MVA, 220/33KV TRANSFORMER
NO-IV
Replacement of outlived 245kv
circuit breaker
2 16.07.15 09:00Hrs to
19.07.15 17:00Hrs
100MVA, 220/33KV TRANSFORMER
NO-III ALONGWITH BUS-I
Replacement of outlived 245kv
circuit breaker
3 20.07.15 09:00Hrs to
23.07.15 17:00Hrs 220KV GEETA COLONY CKT-I
Replacement of outlived 245kv
circuit breaker
4 24.07.15 09:00Hrs to
27.07.15 17:00Hrs 220KV GEETA COLONY CKT-II
Replacement of outlived 245kv
circuit breaker
5 28.07.15 09:00Hrs to
31.07.15 17:00Hrs 220KV I.P. CKT-I
Replacement of outlived 245kv
circuit breaker
6 01.08.15 09:00Hrs to
04.08.15 17:00Hrs 220KV I.P. CKT-II
Replacement of outlived 245kv
circuit breaker
7 05.08.15 09:00Hrs to
08.08.15 17:00Hrs 220KV BUS-COUPLER
Replacement of outlived 245kv
circuit breaker
8 09.08.15 09:00Hrs to
12.08.15 17:00Hrs 220KV GAZIPUR
Replacement of outlived 245kv
circuit breaker
5.7 Proposed Shutdowns at 220kV I.P. S/S.
OCC deferred the following shutdowns proposed by DTL at 220kV I.P. S/Stn. To next OCC
meeting:
S.
No.
Proposed Date & time
of S/D
Name of the feeder /
equipment
Work to be
carried out
Remarks
1 10.07.15 094:00Hrs to
11.07.15 22:00Hrs 220kV Bus-I South Section
Bus bar
replacement
work
Load can be shifted on 220kV Bus-
II South Section
2 12.07.15 094:00Hrs to
13.07.15 22:00Hrs 220kV Bus-II South Section
Load can be shifted on 220kV Bus-
I South Section
3 14.07.15 094:00Hrs to
15.07.15 22:00Hrs 220kV Bus-I North Section
Load can be shifted on 220kV Bus-
II North Section
4 18.07.15 094:00Hrs to
19.07.15 22:00Hrs 220kV Bus-II North Section
Load can be shifted on 220kV Bus-
I North Section
6.0 Meeting ended with vote of thanks to the chair.
MOM of OCC meeting dt. 07.07.15
Page 13 of 14
MOM of OCC meeting dt. 07.07.15
Page 14 of 14