minutes of st1 steering committee meeting thof … of...2016/05/06 · minutes of st1 steering...

Minutes of 1st Steering Committee Meeting of 2016-17 held on 6

th May, 2016 at 10.30AM in the office of

General Manager(Planning), DTL

On the outset, General Manager(Planning) welcomed the representatives of all utilities in the meeting. The list

of participants in enclosed as Annexure.

A. Confirmation of Minutes of Steering committee Meetings held on 10.03.2016 and 14.03.2016

The minutes of Steering Committee Meeting held on 10.03.2016 were circulated vide letter No.

F.DTL/202/MGR(CE&STU)/2015/OPR(PLG)/G-32/08 dated 28.04.2016 and the minutes of the special

Steering Committee Meeting held on 14.03.2016 were circulated vide letter No. F.DTL/MGR(SS&LM)/75/ dt

21.03.2016. No comments have been received so far.

Steering Committee approved the Minutes of meetings held on 10.03.2016 and 14.03.2016.

B. Follow up action of earlier meetings

1. 220/33kV GIS at Jasola

In the Steering Committee Meeting held on 10.03.2016, the BRPL was advised to draw out evacuation plan

according to the commissioning schedule of the Jasola 220kV S/Stn. by 2019-20. Accordingly, BRPL was

advised to firm up the requirement of the S/Stn. at 220/66kV or 220/33kV as dual stage i.e. 220/66kV and

220/33kV levels as required by BRPL cannot be possible due to space constraints. It was also indicated that

220/33kV S/Stn. at Maharani Bagh is also under tendering stage and expected to be commissioned by 2018-19.

BRPL intimated that their requirement is of 220/33kV S/Stn. at Jasola as the requirement at 66kV level is met at

Sarita Vihar S/Stn. of DTL and 66kV Mathura Road S/Stn. of BRPL. In future also no appreciate enhancement

of load demand at 66kV level is anticipated. However, as the 220/33kV Maharani Bagh S/Stn. is under

tendering stage and as such 500MVA load(300MVA at Maharani Bagh & 200MVA at Jasola) may not be able

to be used simultaneously. As such, they requested to defer the commissioning of 220/33kV Jasola S/Stn. to

2021-22.

DTL informed that the Business Plan has already been submitted on 12.04.2016 to DERC based on the

discussion held in the Steering Committee meeting held on 14.03.2016 where in the commissioning schedule of

Jasola S/Stn. is fixed at 2019-20.

Considering the overall requirement, Steering Committee advised DTL to plan the commissioning of

220/33kV Jasola S/Stn. by 2021-22. Further, TOWMCL who has given the no objection to use the piece of

land for establishment of the S/Stn., was advised to plan the usage of the land till 2018-19 i.e. 2 years

before the commissioning of S/Stn. and BRPL was advised to firm up evacuation plan according to the

commissioning schedule of 220/33kV Jasola i.e. 2021-22.

2. Provision of 66/33kV 25MVA Transformer at 220kV Sarita Vihar for connectivity of TOWMCL

In the Steering Committee Meeting held on 10.03.2016, TOWMCL was advised to reconsider the request for

provision of connection of Okhla Waste Plant at Sarita Vihar considering the reliability issue. In response to the

advice, TOWMCL submitted the following;

At present generation switchyard at TOWMCL Campus is running with single ICT at the generating station and

single 66 & 33kV bay at 66kV Jasola S/Stn. of BRPL. The present grid connectivity is with single feeder

extended from TOWMCL campus to 66kV Jasola S/Stn. of BRPL.

However, reliability with respect to dual transformers, dual feeders etc. are always better for healthy power

supply, but it also involves much higher capital investment. There is always a trade-off between reliability and

capital investment.

Further, as the proposed connectivity is temporary till the 220/33kV Jasola S/Stn. gets ready within the plant

premises. The dual transformer and dual feeder arrangement will cost around 2-3 times. As such, they requested

to consider the present proposal with single transformer and single feeder (1x25MVA) for establishing the

connectivity at 220kV S/Stn. at Sarita Vihar. It was also explained that the interruptions at 220kV S/Stn. would

definitely be less than that occur at 66kV S/Stn. It was also explained that there were 97 interruptions occurred

in the plant during the period 01.01.2015 to 31.03.2016 as detailed here under:

Details of tripping of TOWMCL generating plant during the period 01.01.2015 to 31.03.2016

S No.

Tripping Relay

Operated

Reason for Tripping Extension

of Power

supply

(Hr:Min)

Synchronization Time Lost

Reason

Fault Date

Time

(Hr:Min) Date

Time

(Hr:Min) (Hr:Min)

Mech Elect Others

1 01.01.15 12:50 P341 13:08 01.01.15 13:09 00:19 Supply failure from 66kV Jasola

2 01.01.15 16:50 P341 Yes 01.01.15 17:23 00:33 -do-

3 05.01.15 14:35 Yes Yes 10.01.15 09:38 Plant Shut down

4 10.01.15 15:43 P341 Yes 15:48 10.01.15 15:50 00:07 Supply failure from 66kV Jasola

5 15.01.15 12:07 P341 P632 Yes 12:46 15.01.15 12:48 00:41 -do-

6 23.01.15 14:08 P632 Yes 23.01.15 14:11 00:03 Plant Shut down REF


8 29.01.15 17:43 P341 Yes 17:50 29.01.15 17:51 00:08 -do-

9 25.01.15 06:48 P341 Yes 25.01.15 07:12 00:24 Fuel supply issue

10 31.01.15 17:17 P341 Yes 31.01.15 17:32 00:15 Grid Fluctuation. E/F


12 15.02.15 12:55 P341 Yes 15.02.15 13:00 00:05 Grid Fluctuation.

13 18.02.15 10:50 P341 Yes 18.02.15 10:56 00:06 Grid Fluctuation. E/F

14 18.02.15 11:30 P341 Yes 18.02.15 11:33 00:03 Grid Fluctuation. Vector surge,E/F

15 25.02.15 08:56 Yes 25.02.15 09:07 00:11 Turbine issue Low Pressure



18 01.03.15 12:57 P341 Yes 01.03.15 13:17 00:20 Supply failure from 66kV Jasola df/dt and vector surge




22 10.03.15 19:15 Yes 10.03.15 19:37 00:22 Supply failure from 66kV Jasola Hot Oil Level High

23 12.03.15 14:05 12.03.15 14:10 00:05 Grid Fluctuation. df/dt and vector shift

24 15.03.15 09:48 09:54 15.03.15 09:57 00:09 Supply failure from 66kV Jasola

25 16.03.15 15:42 P632 Yes 16.03.15 15:45 00:03 Grid Fluctuation. REF

26 21.03.15 13:40 P632 Yes 13:53 21.03.15 13:55 00:15 Supply failure from 66kV Jasola REF

27 03.02.15 06:05 P632 Yes 03.02.15 06:16 00:11 Grid Fluctuation. HV ref. & REF


29 06.04.15 19:14 P341 Yes Yes 19:25 06.04.15 20:28 01:14 Grid Fluctuation. Under /over voltage

relay trip

30 10.04.15 11:00 15:15 10.04.15 18:29 07:29 Grid Shut Down

31 13.04.15 15:22 P341 13.04.15 17:02 01:40 Grid Fluctuation. df/dt & vector shift

32 13.04.15 18:59 P341 Yes Yes 19:03 13.04.15 19:26 00:27 Grid Fluctuation. df/dt

33 14.04.15 12:30 Yes 14.04.15 13:51 01:21 DCS Fail

34 17.04.15 19:42 P341 P632 Yes 17.04.15 19:46 00:04 Grid Fluctuation. HV ref. & REF




38 20.04.15 02:10 P341 P632 Yes 20.04.15 02:17 00:07 Grid Fluctuation. EHV ref. O/C& REF


40 19.04.15 18:53 Yes 19.04.15 19:00 00:07 Tap Changer MPCB Tripped Tap Changer MPCB

Tripped


42 29.04.15 08:00 P341 P632 Yes Yes 08:05 29.04.15 08:23 00:23 Over Frequency Vector Shift & REF

43 01.07.15 07:02 P341 Yes 07:40 01.07.15 07:43 00:41 Supply failure from 66kV Jasola E/F

44 06.05.15 05:37 P341 Yes Yes 05:40 06.05.15 05:59 00:22 Supply failure + Turbine REF


46 06.05.15 12:02 P341 Yes 12:24 06.05.15 12:26 00:24 -do-

47 07.05.15 13:13 P341 Yes Yes 15:40 07.05.15 16:27 03:14 Supply failure + Turbine

48 10.05.15 11:57 P341 P632 Yes 10.05.15 12:01 00:04 Grid Fluctuation E/ F & REF

49 10.05.15 12:19 P341 P632 Yes 10.05.15 12:23 00:04 Grid Fluctuation E/ F & REF

50 10.05.15 12:30 P632 Yes 10.05.15 12:34 00:04 Grid Fluctuation REF

51 11.05.15 20:54 P341 P632 Yes Yes 21:14 11.05.15 22:14 01:20 Supply failure + Turbine High Pressure, REF&

vector Shift

52 11.05.15 00:06 P341 Yes 11.05.15 00:08 00:02 Grid Fluctuation

53 13.05.15 12:24 Yes Yes 13:05 13.05.15 13:44 01:20 Supply failure + Turbine

54 19.05.15 14:33 P341 P632 Yes 14:40 19.05.15 14:41 00:08 Supply failure from 66kV Jasola REF,E/F & Vector Shift

55 24.05.15 11:44 P632 Yes 24.05.15 11:46 00:02 Grid Fluctuation REF

56 27.05.15 04:38 P341 Yes Yes 05:00 27.05.15 06:03 01:25 Supply failure + Turbine TG on Under

Impedance & grid on

vector shift

57 25.06.15 06:02 P341 Yes 06:05 25.06.15 06:06 00:04 Supply failure from 66kV Jasola REF & Earth Fault

58 01.09.15 16:26 P341 Yes 17:12 01.09.15 17:14 00:48 -do- Voltage Vector Surge

59 10.09.15 15:40 Yes 10.09.15 16:09 00:29 ACC Breaker Tripped manually ACC VFD 1 Flashed

60 24.09.15 18:58 P341 01:15 24.09.15 01:20 06:22 Supply failure from 66kV Jasola Numerical O/C & E/F

61 25.09.15 03:21 P341 25.09.15 03:25 00:04 Grid Fluctuation df/dt & vector shift

62 23.10.15 17:32 YES 24.10.15 01:50 08:18 Instrument Problem PLC Hang

63 12.10.15 22:09 22:33 12.10.15 22:47 00:38 Supply failure from 66kV Jasola df/dt & vector shift

64 27.10.15 11:53 27.10.15 12:06 00:13 Changeover of supply Grid Changeover

65 27.10.15 17:59 P341 18:05 27.10.15 18:05 00:06 Grid Fluctuation Numerical O/C & E/F

66 27.10.15 20:33 P341 27.10.15 20:36 00:03 Grid Fluctuation Numerical O/C & E/F

67 27.10.15 21:35 P341 21:41 27.10.15 21:43 00:08 Changeover of supply df/dt

68 05.11.15 12:25 P341 05.11.15 12:54 00:29 Grid Fluctuation Low Lube oil

Pressure + voltage

Surge

69 05.11.15 15:45 05.11.15 16:01 00:16 Instrument Trial Lube Oil Pressure Trial

70 05.11.15 17:20 05.11.15 17:38 00:18 Changeover of supply Numerical O/C &

E/F & turbine at

home load

71 09.11.15 12:22 P341 YES 09.11.15 12:38 00:16 Changeover of supply Changeover of supply


73 21.11.15 01:46 YES 21.11.15 02:26 00:40 Electrical 11 kV PT Fuse break




77 04.12.15 13:00 01:45 04.12.15 13:46 00:46 -do- df/dt & vector shift


79 07.12.15 11:36 07.12.15 11:40 00:04 Grid Fluctuation Numerical O/C & E/F






85 28.01.16 14:45 03:05 28.01.16 15:07 00:22 -do- df/dt & vector shift

86 04.02.16 00:08 06.02.16 08:13 56:05:00 Plant Shut down Plant Shut down

88 06.02.16 08:48 06.02.16 09:04 00:16 Instrument Problem Instrument problem

89 07.02.16 17:00 P341 P632 05:15 07.02.16 18:04 00:49 Supply failure from 66kV Jasola df/dt & vector shift

90 20.02.16 01:41 20.02.16 02:01 00:20 Hunting Problem Hunting Problem


92 08.03.15 10:43 08.03.15 11:03 00:20 Vacuum low Vacuum low


94 17.03.16 03:12 17.03.16 03:26 00:14 High Pressure High Pressure

95 18.03.16 08:20 YES 18.03.16 08:32 00:12 ACC Breaker Problem ACC Breaker

Problem

96 19.03.16 07:54 YES 19.03.16 08:19 00:25 ACC Breaker Problem ACC Breaker

Problem


Note: Relay P341 and P632 indicate trouble in Grid supply.

However, it is assured that reliability criteria will definitely be considered by TOWMCL at the time of

interconnection with proposed DTL 220/33kV Jasola S/Stn. in future.

After deliberations, Steering Committee was of the view that connectivity of the generating station

(TOWMCL is basically a generator) is preferred to have the connectivity at 220kV S/Stn. of DTL to lower

level S/Stn. considering the reliability issue. It was also noted that the upcoming such generators at

Gazipur and MSW Solution’s generating plant at Bawana are connected at 66kV level at Gazipur and

DSIDC Bawana 220kV S/Stns. respectively. As such, the proposal of TOWMCL to establish the

connectivity of TOWMCL generating station through 33/66kV 25MVA Transformer at Sarita Vihar

220kV S/Stn. has been accepted as a deposit work.

3. Non usage of allocated bays at different 220kV S/Stns. of DTL S.

No.

Name of

S/Stn.

No. of Spare

Bays

unutilized

Details of unutilized

Bays

Date of

Allocation

Utilities to

whom the bay

is allocated

Remark

1 AIIMS 5 1. Sanjay camp

2. Jor Bagh

3. Kidwai Ngr East-I

4. Race Course

5. IIT Campus

Original

allocation

of bays

are

19.11.09

NDMC In the meeting held on 10.03.2016, the issue

could not be discussed due to absence of the

representative of NDMC. Further, the

Steering Committee allocated two no. bays at

AIIMS 33kV side to BRPL for NDSE-II &

HUDCO Place feeders to ensure maximum

possible evacuation from AIIMS S/Stn. and

utilization of National Assets. A joint site

visit along with BRPL & DTL representative

was carried out on 10.05.2016 to explore the

possibility of spare Bays. During the site visit

the following was revealed; Details

of bays

Nos. Earmarked for

220kV 7 2for 100MVA Txs.

4 for feeder bays (2 for

Maharani Bagh, 2 for Ridge Valley), 1 B/C

33kV 22 1. Trauma Centre-I

2. Trauma Centre-II

3. Sanjay Camp

4. Kidwai Ngr-I

5. Kidwai Ngr-II

6. Jor Bagh

7. Bhikaji Cama

8. Kidwai Ngr East-I

9. I/C-I

10. Rajeev Gandhi Bhawan

11. Bus Coupler 12. Bus 1& Bus 2 PT

13. Race Course

14. I/C-II

15. Netaji Nagar-I

16. Netaji Nagar-II 17. Netaji Nagar-III

18. Safdarjang Hospital

19. IIT Campus

20. AIIMS-I

21. AIIMS-II

22. AIIMS-III

From the above, it is clear that at present

there is no bay available to accommodate

additional feeders at 33kV and 220kV level.

As such, BRPL is required to change the plan

as there is no scope for connection of NDSE-

II & HUDCO as approved in the steering

committee meeting held on 10.03.2016. It is

intimated that NDMC has planned for

connection of all the bays allocated to them

by the end of 2017-18.

It was also informed that the load demand of

AIIMS has already crossed the N-1

contingency as under:

Tx. No.

Load at the time of peak

20.05.2016

at 15:18Hrs.

6188MW

Delhi Peak

19.06.2015 at

15:39Hrs.

5846MW Delhi

Peak

15.07.2014 at

15:20Hrs.

5925MW Delhi

Peak

MW MVAr MW MVAr MW MVAr

1 46 11 50 17 42 11

2 48 10 50 17 00 00

Total 94 21 100 34 42 11

It was also clarified that as per decision taken

in the Special Steering Committee Meeting

held on 14.03.2016, the installation of

additional transformer at AIIMS is planned

for the year 2021-22 considering the load

requirement and 220kV GIS bay extension to

accommodate the additional Transformer.

Winding up the discussions, considering

the present loading conditions of the grid

and likely hood of additional load of

NDMC feeders and that of IIT

feeder(likely to be commissioned by

15.07.2016 as intimated by BRPL), BRPL

was advised to change the plan for

connection of NDSE-II & HUDCO at

AIIMS. It was also considered that the

installation and commissioning of 220kV

GIS and 100MVA additional Transformer

at Lodhi Road by Dec,2016. The load of

the S/Stns. can be transferred to Lodhi

Road.

2 Electric

Lane

6 1. V. Bhawan

2. Hanuman Road

3. Janpath Lane

4. Church Road

5. Delhi High Court

6. IGNCA

Original

allocation

of bays

are

19.11.09

NDMC NDMC representative indicated that all the

circuits envisaged except Delhi High Court

feeder would be commissioned by Mar, 2018.

For Delhi High Court, the matter is being

pursued with Delhi High Court to provide

space for establishing the S/Stn. in the

premises.

It was revealed that the load demand of the

S/Stn. is also increasing which is evident

from the following table:

Tx. No.


20.05.2016

at 15:18Hrs.

6188MW

Delhi Peak

19.06.2015 at

15:39Hrs.

5846MW Delhi

Peak

15.07.2014 at

15:20Hrs.

5925MW Delhi

Peak


1 35 12 38 16 85 15

2 36 15 41 17 00 00

Total 71 27 79 33 85 15

It was also revealed that there is no space

for additional transformer and GIS bays.

Hence, Steering Committee was of the view

that no additional feeders be allowed to

connect than that has already been

planned. NDMC was also advised to

adhere the time line for evacuation of

power through feeders already planned.

3. DSIIDC

Bawana

5 1. Bay-619 NSC-I Ckt-I

2. Bay-620 NSC-I Ckt-II

3. Bay 629 BWN-7 Ckt-I

4. Bay 630 BWN-7 Ckt-II

5. Bay -632 DMSW

11.06.14

11.06.14

03.07.13

TPDDL

TPDDL

TPDDL

TPDDL

DMSW

By Dec, 2017

By Dec, 2017

By Dec, 2017

By Dec, 2017

Already connected

All the bays earmarked for TPDDL were

requisition based on the requirement of

DSIIDC. DSIIDC has not yet remit the

amount to TPDDL as all the schemes are

envisaged as deposit work.

The loading pattern of the S/Stn. was

analyzed as under:

Tx. No.


20.05.2016

at 15:18Hrs.

6188MW

Delhi Peak

19.06.2015

at 15:39Hrs.

5846MW

Delhi Peak

15.07.2014

at 15:20Hrs.

5925MW

Delhi Peak


100MVA-I 46 04 73 12 56 06

100MVA-II 45 01 73 03 55 00

160MVA 71 05 00 00 00 00

Total 162 10 146 15 111 06

Steering committee was advised TPDDL to

adhere the time line for evacuation of

power through the feeders already planned

particularly considering the additional

160MVA Tx. commissioned on 4th

Jan,2016.

4. Mehrauli --- 5 New bays BRPL

DMRC

Construction of 05 bays in pipeline,

DMRC/BRPL may indicate the time line

2 bays Fatepuri beri (2017-18)

2 bays Andheria bagh (2019-20)

1 bay for DMRC

On revelation of records, it was found that one

out of 5 bays was allocated to DMRC as per

their requirement for Ph-III projects-Line 8

i.e. Kalindi Kunj, Janak Puri. It was confirmed

by BRPL that if DMRC could not be able to

utilize allocated bay at Mehrauli, BRPL would

use it.


analyzed as under:

Tx. No.


20.05.2016

at 15:18Hrs.

6188MW

Delhi Peak

19.06.2015

at 15:39Hrs.

5846MW

Delhi Peak

15.07.2014

at 15:20Hrs.

5925MW

Delhi Peak


100MVA-I 72 13 60 09 75 11

100MVA-II 00 00 93 20 00 00

100MVA-III 76 13 00 00 78 10

160MVA 89 21 109 06 86 -5

Total 237 47 262 35 239 16

5. Mundka 8 1. Bay 604

2. Bay 606

3. Bay 610

4. Bay 613

5. Bay 614

6. Bay 617

31.05.2012

BRPL/

TPDDL Two bays for TPDDL Kirari would be

utilized by 2018-19.

Four bays for BRPL i.e. Bakkarwala(2 Nos.)

& Nilothi(2 Nos.) would be utilized by 18-19


analyzed as under:

Tx. No.


20.05.2016

at 15:18Hrs.

6188MW

Delhi Peak

19.06.2015

at 15:39Hrs.

5846MW

Delhi Peak

15.07.2014

at 15:20Hrs.

5925MW

Delhi Peak


160MVA-I 64 10 52 09 73 09

160MVA-II 64 09 54 09 73 09

Total 128 19 106 18 146 18

4. Phasing out of 66/33kV, 30MVA Tx. at Narela (Delhi OCC issue)

TPDDL informed that there is one 33kV TPDDL’s AIR Khampur S/Stn. is emanating from 66/33kV, 30MVA

Transformer at 220kV Narela Grid. After removal of 30MVA transformer by DTL owing to its critical

condition, the 33kV circuit from 220kV Narela to AIR Khampur will be left with no source at 220kV Narela

end. In that situation, N-1 criteria of AIR Khampur Grid shall not be achieved as during N-1 of 33kV RG5-AIR

Khampur Ckt., total 36MVA load of Air Khampur &Tigipur Grid cannot be met on 33kV Jahangir Puri-Tigipur

Ckt. The detailed loading arrangement is shown in the schematic shown below:

Both AIR Khampur & Tigipur Grid feeds very critical load of All India Radio, Tikri Sewage Plant and Rainey

Well, therefore urgent restoration of supply is necessary for N-1 condition.

By considering above facts, it was felt that supply from 66/33kV, 30 MVA Transformer is required to be made

available at AIR Khampur Grid for N-1 contingency.

TPDDL further informed that scheme for installation of 66/33kV, 50 MVA Transformer at A-7 Narela Grid has

been approved by DERC vide the letter issued on 04.04.2016. It was also informed that the transformer is

expected to be commissioned by 31.03.2017.

It was decided that after commissioning of proposed 66/33kV 50 MVA Transformer at A-7 Narela Grid

by TPDDL, 30 MVA Transformer at 220kV Narela may be decommissioned.

5. Establishment of 66kV sub-station at Bharthal by BRPL

In the Steering Committee meeting held on 10.03.2016, it was informed that as per the requirement of BRPL,

Delhi Govt. got the land allocated from DDA for this S/Stn. DTL has given feasibility to co-locate the 220kV

S/Stn. in this location. But due to in-adequate load requirement in this area, DTL has no Plan for establishment

of 220kV S/Stn. in this location till 2022-23. It was intimated that as per the request of BRPL through GNCTD,

DDA vide letter No. F29(2)12/II/2681 dated 13.12.2013 allocated 8550 Sqm. land at sector-26 Dwarka, near

Vill. Bharthal for the purpose of establishment of 66kV S/Stn. The land was allocated to GNCTD@ Rs. 932.33

lacs per acre with annual ground rent @ 2.5% per annum of the total premium (aggregate of the provisional land

final premium). Accordingly, details of demand note raised by DDA to GNCTD on 13.12.2013 as under;

S No. Particulars Rate Amount(in Rs.)

1. Premium of ESS land

measuring8550Sqm.

@ Rs. 932.33 lacs per acre (Provisional) 19,69,77,941.00

2. Ground Rent @ 2.5% per annum 49,24,449.00

3. Documentation Charges 45.00

Total 20,19,02,435.00

The record also revealed that vide DTL’s letter dated 19.01.2015 addressed to DDA intimating that

The Co-location of 220kV S/Stn. of STU/DTL with 66kV S/Stn. of DISCOM/BRPL is quite possible within the

size of land measuring 8550Sqm.

DTL and BRPL will jointly decide the favour of their respective S/Stn. within this 8550Sqm. Land after

allocation of land to Power Deptt by DDA. Both the utilities will propose GIS S/Stn. in the proposed area for

Co-locating of two S/Stns. in the same area.

It was further intimated that GNCTD vide letters dated 16.02.2015, 27.07.2015, 02.12.2015, 16.03.2016 and

09.05.2016 have been requesting BRPL/BYPL to pay the license fee as per the existing land policy. It was also

revealed that a meeting was also taken by Spl. Secy(Power), GNCTD on 03.11.2015 in this regard wherein the

following were decided;

The land plot shall be equally divided/shared amongst DTL and BRPL

DTL as well as BRPL shall pay the license fee in r/o land p size taken over by them as per existing land

policy i.e. @20% of land premium as annual license fee

The officers of DTL and BRPL will make joint inspection within week which was accepted by both of them.

Joint inspection report will be submitted latest by 20th Nov,2015.

Next meeting will be held after receipt of report.

As such the issue was discussed in the Steering Committee held on 10.03.2016. But no conclusion could be

reached.

In this meeting, it was informed by BRPL that there is no plan for construction of 66kV Grid S/Stn. at Bharthal.

Presently, BRPL is constructing one Grid S/Stn. at G-7 Dwarka, with 50MVA capacity, expected to be

commissioned by March,2017. This will be able to cater the load growth of the area for next 3 years. DTL

indicated that if BRPL cannot construct the S/Stn., it will not be able to construct the S/Stn. as DTL has given

only the feasibility of construction of 220kV GIS by DTL and 66kV GIS S/Stn. by BRPL. It was also felt that

without load requirement, the huge investment is not in public interest. Both the parties will review the

requirement of land after 3 years and will approach Dept. of Power, GoNCTD accordingly.

Steering Committee advised both DTL and BRPL to take up the matter with GNCTD accordingly.

C. New Issues

TPDDL Issues

1. 66/11 kV 2x25MVA GIS LRIA Grid with LILO of 66kV Double Circuit U/G cable between H4-H5 &

PP-3 Grid at proposed 66/11kV LRIA Grid.

TPDDL informed that in Lawrence Road Industrial Area (LRIA), trend of many small units in single plot are

emerging. It will result in huge load growth; load demand is assessed as 16.82 MW. At present, this area is

being fed through Rampura Grid. However, due to railway line, laying of any new feeder from Rampura Grid

would not be possible execute easily and it will also create a huge cost of RoW. To mitigate the load growth of

LRIA and due to space constraint, earlier, 33/11kV 1 X 25MVA GIS LRIA Grid was proposed and same was

agreed in principle by Steering Committee on 19.11.2014 and 03.06.2015. The scheme was proposed to be

funded through the central Govt. sponsored IPDS.

TPDDL further informed that as per guidelines of using IPDS funds, “All DISCOMs including private sector

DISCOMs and State Power Departments (referred to as Utilities) will be eligible for financial assistance under

the scheme. In case of private sector DISCOMs where the distribution of power supply in urban areas is with

them, projects under the scheme will be implemented through a concerned State Government Agency and the

assets to be created under the scheme will be owned by the State Government / State owned companies. These

assets will be handed over to the concerned DISCOMs for their use during the license period on mutually agreed

terms and conditions. The responsibility of operation and maintenance of these assets would be of the concerned

DISCOMs”.

It was suggested in the meeting that instead of 33/11kV, 1x25MVA LRIA Grid, it would be better to construct a

complete 66/11kV, 2X25MVA GIS LRIA Grid by using part space of DTL scrap yard near fire station, LRIA. It

was further felt that the above proposal would serve the long term benefit for the concerned area with the

scheme as under.

Proposed Grid

Name

Voltage

Level

EHV Lines required Total No of

EHV Circuits

proposed

Proposed

Transformation

capacity

66/11kV

LRIA (GIS)

66/11kV LILO of proposed 66kV Double Circuit

U/G cable between H4-H5 & PP-3 Grid

4 2 X 25MVA

TPDDL further intimated that if the scheme is executed through IPDS, the asset ownership of above proposed

66/11kV LRIA Grid will be owned by DTL, therefore there is no requirement of handing over/taking over of

land between DTL and TPDDL.

Steering committee deliberated the proposal submitted by TPDDL and agreed in principle on technical

grounds. However, the funding of the project would solely be the responsibility of the TPDDL. 2. 33/11kV 25 MVA 3rd Power Transformer at Tripolia Grid.

33/11kV 25 MVA 3rd Power Transformer at Tripolia Grid is proposed to mitigate N-1 of Tripolia & Shakti

Nagar Grid. This proposal was already agreed in principle by Steering Committee on 03.06.2015 (IPDS).

TPDDL intimated that the present load and projected load of the Grid S/Stns. namely, Tripolia & Shakti Nagar

are as under;

Grid Transformer

Tx.

Capacity

(MVA)

Peak Load

(MVA) Projected Load (MVA)

Summer'15 Summer'16 Summer'17 Summer'18 Summer'19

Tripolia Trf-1 25 9.7 10.4 11.1 11.9 12.7

Tripolia Trf-2 25 14.5 15.5 16.6 17.7 19.0

Shakti Nagar Trf-1 16 10.4 11.2 12.0 12.8 13.7

Shakti Nagar Trf-2 20 7.1 7.6 8.1 8.7 9.3

As per above table, it is clearly shown that PTRs at Tripolia &Shakti Nagar Grid S/Stns. are losing N-1 criteria

in Summer’18. To meet the N-1 criteria of both Tripolia& Shakti Nagar Grid S/Stns., TPDDL proposed to

install an additional 33/11kV 25 MVA 3rd Power Transformer at Tripolia Grid. They proposed the scheme

under IPDS


grounds. However, the funding of the project would solely be the responsibility of the TPDDL.

3. 66/11kV, 2x25 MVA GIS H4-H5(Pitam Pura) Grid along with 66kV Double Circuit U/G cable from

MGP-2 and 66kV Double Circuit U/G cable from PP-3 Grid.

TPDDL informed that 66/11kV 2x25 MVA GIS H4-H5 Grid is proposed to mitigate N-1 of Mangol Puri(MGP)-

2 and Pitam Pura (PP)-2 Grid. Projected Grid loading of MGP-2 & PP-2 Grids are as under;

As per above table, it is clearly shown that PTRs at MGP-2 & PP-2 Grid are losing N-1 criteria in Summer’18.

Also in nearby grids, there is unavailability of 11kV panels to lay new 11kV Feeders. Hence a new 66/11kV

Grid is proposed to mitigate the overloading and meeting the N-1 contingency of above said PTRs. Since

location of H4-H5 grid is at load centre therefore it will also help to reduce the 11kV feeder length and reduce

technical loss also. The details are as under;

Proposed

Grid

Name

Voltage

Level


EHV Circuits

proposed

Proposed

Transformation

capacity

66/11kV

H4-H5

66/11kV 2 Nos. of 66KV Ckts from MGP-2 Grid

2 Nos. of 66KV Ckts from PP-3 Grid

4 2 X 25 MVA

Note : 2 Nos. of 66kV Outdoor Bays shall be constructed at MGP-2 Grid

They proposed the scheme under IPDS.


grounds. However, the funding of the project would solely be the responsibility of the TPDDL.

4. 66/11 kV Budh Vihar (Rohini Sector-20) Grid

TPDDL informed that a new 66/11kV Budh Vihar Grid was proposed and agreed in principle in Steering

committee meeting dated 24th Sep, 2014 to mitigate the overloading of 66/11kV Rohini-2 Grid.

Earlier 2 *25 MVA Power Transformer were proposed however considering future load growth of RG 22 and

RG 23 Grid, TPDDL proposed the installation of 2 Nos., 31.5MVA Transformer in place of 25MVA.

Besides that for better utilization of source availability at Kanjhawala Grid as well as to provide load relief to

220kV Rohini, TPDDL proposed the change in 66kV circuit connectivity and revised proposal as under:

Proposed

Grid Name

Voltage

Level

Type

of Grid

EHV Lines Required Total No of EHV

Circuits Proposed

Proposed

Transformation Capacity

66/11 kV Budh

Vihar (Rohini

Sec-20 ) Grid

66/11kV GIS 66kV D/C connectivity from

66/11kV Karala Grid

66kV D/C connectivity from

66/11kV RG 22 Grid

4 2 X 31.5 MVA

Note: 2 nos. of 66kV GIS Bays at Karala Grid & 2 nos. of 66kV Outdoor Bays at RG 22 Grid to be constructed

It was further informed that the above 66/11kV GIS Grid shall be constructed by using existing space of 11kV

D4-Sec 20 S/Stn.(30M x 18M) at Rohini Sec-20. Therefore, 66/11kV BudhVihar Grid is renamed as 66/11kV

Rohini Sec-20 Grid.

In place of earlier proposed 2x25MVA 66/11kV Power Transformers, TPDDL shall install 2x31.5MVA

Transformers at proposed Rohini Sec-20 Grid by considering future load growth of RG-2, RG-22 and RG 23

Grid. TPDDL informed that they have worked out upon the layout of proposed 66/11kV Grid and 31.5MVA is

the optimum capacity of Power Transformers which can be incorporated in the available space of 30M x 18M.

Above revised proposal for 66/11kV Rohini Sec-20 Grid had already been deliberated in detail & agreed in

principle in Steering Committee Meeting held on 10.03.2016. However same was not reflected properly in MoM

of the said meeting circulated on 29.04.2016. Therefore TPDDL requested SCM to incorporate & approve the

above proposal.

Steering committee deliberated the proposal submitted by TPDDL and agreed in principle.

5. Replacement of existing sick 20 MVA PTR-1 with new 25MVA PTR at Pitam Pura-1 Grid S/Stn.

TPDDL informed that existing 66/11kV, 20MVA Transformer-I was installed and commissioned at PP-1 grid

32 years back, almost served its useful life. Furan contents of existing PTR were 2.245 ppm & 3.096 ppm on

31.12.10 & 23.12.2011 respectively which shows increasing trend. Furan content more than 2.500mg/kg in oil

indicates the poor quality of solid insulation due to extensive decomposition of paper.

TPDDL informed that Steering Committee had agreed in principle for the replacement of above sick 66/11kV

20MVA PTR-1 with repaired 20MVA PTR in Meeting held on 3rd

June, 2015. However, DERC rejected the

proposal and suggested for replacement through new Transformer. Now therefore, it is proposed to replace sick

66/11kV 20MVA PTR-1 with new 66/11kV, 25MVA PTR at PP-1 Grid.


6. Installation of Repaired 66/11kV 20 MVA 3rd

Power Transformer at A-7 NARELA Grid

TPDDL informed that the loading of 66/11kV A-7 Narela Grid is currently 24.08MVA w.r.t installed capacity

of 40MVA as per peak loading of summer’15. Considering 6% load growth, projected loading of Summer ’17

would be 34.1MVA including additional load of 3.2MVA from other grid and 3.4MVA as new connection load.

Maximum Grid loading would be 85 % in summer’17 and N-1 of both 20MVA PTR-1& 2 will not be achieved.

The details of the loading conditions are as under;

Grid

Name

Voltage

Ratio

T/F

No.

T/F

Capacity

(MVA)

PTR Load

MVA

(Summer'15

% PTR

Loading (Summer'15)

%

Load

Growth

Projected

PTR Load

(MVA) Summer'16

Load

Transfer

from other

Grid (MVA)

Additional

new load

Projected PTR

Load (MVA)

Summer'17

% PTR

Loading (Summer'17)

N-1

Status

A-7

Narela 66/11 TRF-1 20 11.2 56% 6% 11.8 3.4**

16.2 81% NO

A-7

Narela 66/11 TRF-2 20 12.9 64% 6%

13.7 3.2 *

17.9 89% NO

*3.2 MVA LOAD transfer from 220 kV Narela to A-7 Narela Grid (11kv feeder Dist office Narela, Gautam colony).

** 3.4 MVA load as new connection of BG shrike.

TPDDL informed that the Steering Committee had agreed in principle for installation of 66/11kV, 25 MVA

Additional Power Transformer at A-7 Narela Grid in the meeting held on 3rd

June 2015. However to optimize

capex, it is proposed to install a repaired 66/11 kV, 20MVA 3rd

Power Transformer at A-7 Narela Grid to

mitigate the overloading and achieve N-1 issues of Transformers at A-7 Narela Grid.


7. 66kV Double Circuit connectivity to 66/11kV Burari AIS Grid Sub-Station

TPDDL informed that Steering Committee had agreed in principle for 66/11kVBurari AIS Grid S/Stn. on 20th

Feb 2015. Proposed 66/11kV Burari Grid (Deposit) has 66kV double circuit connectivity from 220kV Gopalpur

Grid S/Stn. of DTL and 66kV double circuit connectivity from Proposed Bhalswa-2 Grid of TPDDL.

Supply to Burari Grid is proposed from the upcoming 160MVA Transformer at 220kV Gopalpur,

constructing of which hasn’t yet started.

At the other end, commissioning of Bhalswa-2 Grid is also getting delayed due to delay in payment by

DUSIB. Bhalswa-2 Grid was proposed for electrification of flats being constructed for slum dwellers under

JNNURM at Bhalswa pocket-II by DUSIB.

There is an appreciable load growth in Burari area and commissioning of 66/11kV Burari Grid is required

before Summer 17. By considering above facts, it is proposed to change the connectivity for Burari Grid from

proposed Bhalswa -2 Grid to Bhalswa Grid. Revised proposal is as follows:

Proposed

Grid

Name

Voltage

Level

Type of

Grid


EHV Circuits

proposed

Proposed

Transformation

capacity

66/11kV

DJB

Burari

66/11kV Outdoor 2 Nos. of 66KV Ckts from

220kV Gopalpur Grid

2 Nos. of 66KV Ckts from

Bhalswa Grid

4 2 X 25 MVA

Note : 2 Nos. of Outdoor AIS bays needs to be constructed at Bhalswa Grid


8. Replacement of old 33kV GIS Panels with new indoor AIS Panels at Saraswati Garden Grid

TPDDL informed that 33kV Saraswati Garden Grid was set up by the erstwhile DVB in Year 2000 with 33kV GIS

BHEL make panels. Due to change in technological advances, design of these 33kV panels is now obsolete. Following

problems are being experienced in Operation & Maintenance of such equipments which are ultimately affecting power

supply reliability as well as maintenance cost:

Frequent SF6 gas leakage from Circuit Breaker and Bus Bar.

Unavailability of Spares, Panel Accessories and OEM Services due to obsolete design of panels.

No provision to measure Contact Resistance of Breaker & No indication on Circuit Breaker regarding isolation of

contacts which is a safety issue.

Frequent mechanism and tripping/closing problems in all breakers

Existing panels have provision for only single XLPE - 400 sq mm cable; hence future load demand cannot be met

as twin cable termination is not possible.

Bus bar extension for new panels or even by using adopter panel is not possible. While considering future load

growth, installation of 3rd

PTR will be required by FY17-18 and there is a sufficient space for that, however same

cannot be executed due to existing old switchgear panels.

Unsatisfactory Insulation Resistance values of Current Transformers and Circuit Breaker.

Heavy vibration during operation of CB resulting tripping of adjacent breaker.

In view of above, it is proposed to replace these old switchgear panels with new 33kV indoor AIS switchgear panels.

The Steering committee discussed the matter keeping in view that the existing switchgear panels have not

completed their useful life as per the guidelines of the DERC. However to maintain the reliability of

power supply it was advised that TPDDL may submit the scheme to DERC with justification of the

replacement of the existing 33kV GIS panels with new indoor AIS panels.

9. Replacement of old Isolators at 33kV Rohtak Road Grid Sub-Station of TPDDL

TPDDL informed that existing 33KV Isolators at Rohtak Road Grid are more than 50 years old and has served

its useful life. Following problems are being experienced in Operation & Maintenance of these equipments

which is ultimately affecting power supply reliability as well as maintenance cost:

Alignment problem between Male and Female Contacts resulting in high value of Contact resistance and

repetitive development of Hot Spots at jaw contacts and clamps.

Frequent failure of Operating Mechanism of these isolators resulting in increase in equipment downtime and

increase in maintenance frequency.

Not compatible to SCADA resulting in unavailability of Opening /Closing Status of Isolator.

Interlocking not available between Isolator & Earth Switch, thus a safety issue.

Unavailability of Spares due to obsolete design of isolators.

Due to ageing, Physical Condition of isolators is very poor and prone to breakage.

Therefore, it is proposed to replace existing old isolators with new 33kV Isolators to ensure safety and security

of equipment / network / personal and trouble free operation of power system.


BYPL Issues

10. Providing additional 33 KV feed from 220kV RPH Grid to 33/11kV Delhi Gate Grid S/Stn.

It was informed that the total capacity of 33 KV Delhi Gate grid is 57 MVA (2X16 MVA + 1X25 MVA).

There are two circuits i.e. I/C IP Station & I/C IG Stadium with max load of 176 Amp (as on 20.06.14 at

16:00Hrs) & 319 Amp (as on 19.06.15 at 15:51Hrs) respectively. Thus, N-1 criterion of the S/Stn. is not met.

Also the permissible loading on cables is 75% due to various Joints and aging of the cables. Considering N-1

criteria, in case of failure of either of the Ckts., all three PTR cannot be run on single circuit.

BYPL informed that SCM held on 10.03.2016 agreed to allocate a bay from RPH for Delhi Gate Ckt., so one 33

KV bay be allocated at RPH and new 33 KV feeder proposed from RPH-Delhi gate be approved.

Steering Committee agreed the proposal and decided to allocate the bay to BYPL to accommodate Delhi

Gate feeder and in case any difficulty the bay of 10MVAr capacitors which is not in operation since long

be allocated considering the fact that the low voltage may not be occurring in and around RPH and

adjoining areas due to no. of 220 & 33kV cables added/to be added in the system. BYPL was also advised

to lay additional feeder (33kV RPH-Delhi Gate) to meet the load demand of the area.

11. Providing additional 33 KV feed from 220 KV RPH Grid to 33/11 KV GB Pant Grid Sub Station.

It was informed that the capacity of G B Pant Grid is 52MVA(2X16 MVA + 1X20 MVA). At present there are

two Ckts, one from RPH & another from 220 IP Station having peak load of 440 Amp (as on 20.06.14 at

16:00Hrs) & 420 Amp (as on 19.06.15 at 15:51Hrs) respectively. Thus n-1 capacity of substation is not met.

Also the permissible loading on cables is 75% due to various Joints and aging of the cables. Considering N-1

criteria, in case of failure of either of the Ckt,, all three Power Tx. cannot be run on single circuit.

SCM held on 10.03.2016 agreed to allocate one bay from RPH for GB Pant Ckt., As such, it was requested to

allocate one 33 KV bay at RPH and new 33 KV feeder proposed from RPH-GB Pant be approved.

Steering Committee agreed the proposal and decided to allocate the bay to BYPL to accommodate G B

Pant feeder and in case any difficulty, the bay of 2nd

10MVAr capacitor which is not in operation since

long be allocated considering the fact that the low voltage may not be occurring in and around RPH and

adjoining areas due to no. of 220 & 33kV cables added/to be added in the system. BYPL was also advised

to lay additional feeder (33kV RPH-G B Pant) to meet the load demand of the area.

12. Permission for laying of 33kV cable from Geeta Colony 220kV to proposed C-Blk Krishna Ngr Grid

BYPL informed that already bay No. 2 & 3 have been allocated to BYPL at Geeta Colony 220kV S/Stn. Now

permission for laying of 33 KV cables inside Geeta Colony Grid is required for laying of 4 no. 33KV cables of 2

Ckts. from Geeta Colony 220kV Grid to proposed C-Blk Krishna Nagar Grid as there was no other way to avoid

the laying of cables within the Geeta Colony 220kV grid S/Stn.

BYPL was advised to coordinate with the Land Management Division of the Planning Deptt. of DTL to

resolve the issue. The issue was subsequently resolved.

13. Request for early commissioning of 2 Nos. 33kV bays at Geeta Colony 220kV Grid S/Stn. for 2Ckts. of

proposed C-Blk Krishna Nagar Grid

BYPL informed that the work of ETC of C Block 33kV Krishna Nagar S/Stn. is in full swing. For energization

of this Grid two no. 33 KV feeders are being laid from Geeta Colony 220kV Grid. But bays at DTL end are not

ready. It was further informed that the target for commissioning of this Grid S/Stn. is August 2016. DTL was

requested to take urgent action in this regard.

It was informed by DTL that the Contract Deptt. of DTL has taken all possible steps to award the contract for

the construction of 2 bays at 220kV S/Stn. Geeta Colony. It was apprised that the tender for this purpose was

earlier floated on 04.04.2016. However, it could not be matured due to lack of participation. The same was

extended for 10 days and opened on 06.05.2016 against which 3 bids have been received which are under

evaluation. It is hoped that the work would be completed in synchronisation with that of the commissioning of

BYPL S/Stn. Krishna Nagar.

Steering Committee advised to DTL to take all possible steps to construct the 33kV bays at Geeta Colony

in synchronisation with that of the commissioning of BYPL S/Stn. Krishna Nagar.

14. Laying of 6 Nos. 1x1000Sq. mm 66kV Cable for Shastri Park Circuit No. 3 and Circuit No. 4

BYPL informed that two Nos. 66kV bays i.e. bay No. 3 and bay No. 4 at Wazirabad 220/66kV grid has already

been allocated to BYPL for 2 Nos. Circuit namely Wazirabad-Shastri Park Circuit No. 3 and Wazirabad-Shastri

Park Circuit No. 4. For connecting these bays to their already existing 66kV four Nos. circuit tower lines. They

have to lay 6 Nos. 1x1000Sq mm 66kV Cable from bay no.3 and bay No. 4(inside Wazirabad 220kV Grid) to

existing tower outside DTL grid. They requested the permission of DTL to lay the cable within the 220kV S/Stn.

Wazirabad as there is no other way.

BYPL was advised to coordinate with the Land Management Division of the Planning Deptt. of DTL to

resolve the issue.

15. Additional 66kV feed required at Shastri Park (Central) 66/33kV Grid S/Stn. by LILO of Park Street-

Ridge Valley Circuit of BRPL

BYPL intimated that this issue was deliberated in the Steering Committee meeting held on 10.03.2016 and

principally it was agreed also, but the same did not reflect in the MOM, so the issue is again put up.

As per loading positions of Shastri Park(Central), it is proposed that one additional feed be provided at Shastri

Park (Central) from Park Street by LILO of existing Park street-Ridge Velly Circuits. This circuit most of the

time remains on no load. In this way one more source will be available at Shastri Park (Central) Grid Substation.

BRPL representative informed that the MoM is rightly drawn out as per the discussions held in the meeting and

subsequent site visit at 66kV Ridge Valley S/Stn. on 05.04.2016 wherein it was decided to have more discussion

with BRPL and BYPL before arriving any conclusion.

As such, BRPL and BYPL were advised to discuss the matter mutually and come out in next Steering

Committee meeting with the amicable solution.

BRPL Issues

16. Construction of new 66/11 kV Grid Substation at DJB Nilothi.

BRPL proposed to construct a new 66/11 kV Grid Substation at DJB Nilothi in West Delhi. Geographically, it is

located on Nangloi – Najafgarh Road. Technical Details for proposed grid substation are under:

DJB is constructing its 20MGD Sewage Treatment Plant at Nilothi. They have applied for 6MW load for their

plant.

The nearest 66/11kV Grid S/Stn. is Nangloi Water Works which is about 3Km from the proposed DJB Nilothi

Grid Substation. Peak loading of 66/11 kV Nangloi Water Works Grid Substation in June 2015 is as under:

S

No.

Power

Transformer

Capacity(MVA) Peak Load (MVA) %age loading N-1%age loading

1 Transformer No.-1 20 19.49 97.45 124.88%

2 Transformer No.- 2 20 16.31 81.55

3 Transformer No.- 3 20 18.59 92.95

4 Transformer No.- 4 25 20.53 82.12

Total 85 74.93 88.15

Power Transformers at Nangloi Water Works are loaded beyond 80% and grid N-1 % loading is also 124%.

After commissioning of Mundka Grid Substation we are expecting a relief of 15-20 MW at Nangloi Water

Works.

A piece of land measuring 90x60 M was handed over by DJB to BRPL for construction of 66/11 kV grid

substation on 25-11-2014.

DJB Nilothi is in the load center, losses shall be reduced with optimum utilization of proposed new grid

substation. A considerable relief shall be provided to existing Nangloi Water Works Grid Substation.

Geographical Locations:

The geographical locations of these grid substations with respective mutual distances are as under:

Design:

It has been proposed to construct a 66/11 kV Grid substation at DJB Nilothi with 2x25 MVA Transformation

Capacity. The in feed is planned from 400 kV Mundaka. The route length is approx. 11.5 Km which is being

planned with composite circuit (O/H + U/G).

S No. Particulars Details

1 Voltage level 66/11 kV

2 Transformation Capacity 2x25 MVA

3 Bus Bar Arrangement 66 kV: Double Bus (Aluminium Tube)

11 kV: Sectionalized Single Bus

4 66 kV infeed arrangement Double Circuit from 400 kV Mundka (Route Length – 11 Km approx.)

Composite Circuit (O/H + U/G)

After deliberations, the Steering Committee approved the proposal in-principle particularly looking into

the fact more evacuation from 400kV S/Stn. Mundaka.

17. ETC of 4th Power Transformer at 66/11 kV Paschim Vihar Grid Substation

BRPL proposed to install additional 4th Power Transformer at 66/11 kV Paschim Vihar Grid Substation.

Presently, there are 03 Nos. 66/11 kV Power Transformer at Paschim Vihar Grid Sub-station. The loading

conditions of all the power transformers for June 2015 are as under:

S

No.

Name of

Grid S/Stn.

Transformer N-1 %

Loading Capacity(MVA) Loading(MVA) % age Load

1.

66/11kV

Paschim

Vihar

20 15.42 77.14% 134.3%

25 20.01 80.03%

20 18.29 91.43%

Total 65 53.72 86.25%

It is seen that the average loading of grid with three power transformers is 86% and N-1 contingency loading is

134%. 66 kV infeed to this grid is through D/C line from 66 kV Budella -2 which is ultimately fed from 220 kV

Najafgarh. Infeed is sufficient for this grid substation.

It is proposed that one additional 66/11 kV 25 MVA Power Transformer may be installed to reduce the grid

loading and N-1 contingency loading.

Steering Committee deliberated the proposal and agreed in-principle.

18. ETC of 4th

Power Transformer at 66/11 kV C-Dot Grid Substation

BRPL proposed to install additional 4th Power Transformer at 66/11 kV C-DoT Grid Substation. Presently, there

are 03 Nos. 66/11 kV Power Transformer at C-Dot Grid Sub-station. The loading conditions of all the power

transformers for June 2015 are as under:

S

No.

Name of

Grid S/Stn.

Transformer N-1 %

Loading Capacity(MVA) Loading(MVA) % age Load

1 66/11kV

C-Dot

20 20.66 103%

150.7% 20 18.86 94%

20 20.76 104%

Total 60 60.29 100.46%

It is seen that the loading of grid with three power transformers is more than 100% and with N-1 contingency

loading is 150%. 66 kV infeed to this grid is through D/C Cable from 220kV Mehrauli. Infeed is sufficient for

this grid substation. It is proposed that one additional 66/11 kV 25MVA Power Transformer may be installed to

reduce the grid loading and N-1 contingency loading.

Considering the summer action plan BRPL is installing spared 16 MVA Power Transformer available to

expedite the work so that the Power Transformer is available before summer peak.

Steering Committee deliberated the proposal and agreed in-principle.

19. Shifting of four Towers of Najafgarh-Budella-2 circuits and two Towers of Budella-2-Paschim Vihar

circuits by Monopoles

BRPL intimated that EHV Tower Lines 66kV Najafgarh-Bodella-2 line and 66 kV Bodella–2–Paschim Vihar

are running along the Najafgarh Drain (Road No. 236) in Vikaspuri. Four spans of 66 kV Najafgarh-Bodella-2

lines are just above the Road's carriage way.

The ground clearance is alarmingly low (approx. 4.7 meters) which is non-compliant with CEA (Measures

relating to safety & Electric Supply ) Regulation, 2010. Apart from this, the line is now dangerous for passers-

by. Similarly two spans of 66 kV Bodella–2–Paschim Vihar line are very low.

In the summer season, due to higher temperature and higher loading, the ground clearance further reduces. The

photographs presented by the BRPL (shown below) show the dangerous condition of the tower line.

Exhibit – 1 Exhibit – 2

The ground clearance of 66 kV line is as low as 4.7

M. It should be 6.1 M minimum as per CEA safety

guidelines for 66 kV lines

The 66 kV line is just above the main carriage way

of the Road.

Exhibit – 3 Exhibit – 4

The 66 kV line is so low that the 11 kV line in the

background appears to be higher than the 66 kV line.

Towers of 66 kV line from other view angle.

BRPL proposed that the part of the line falling in the main carriage way with approx. route length of 1.2 Km.

may be shifted on monopole Towers.

On the question of cost and benefit comparison, BRPL indicated that shifting the line is the only answer to this

problem however there are three options to shift the line:

Shift the line with another Lattice structure tower with raised height and revised ROW.

Shift the line with underground Cables

Shift the line with Monopoles utilizing a part of same RoW.

The cost and benefit analysis of each option is as per following table:

Option – 1 Option – 2 Option – 3

Proposal Shifting and Raising the height

of Line by installing Towers

Shifting of a part of

line by laying

underground cables

Shifting and Raising the

height of Line by

installing Monopoles

Comparative Cost of

the options

Low

Rs. 1.20 Cr. + Taxes

High


Low


Ease in Maintenance

Activity

Easy Difficult Easy

Ease in Supply

restoration

Easy Difficult Easy

Cost involved in

supply restoration

Low High Low

Longevity of

Installation /solution

Low

(Pilferage of member angles,

Weakening of Tower at its base)

High High

(No pilferage of member

angles is involved)

Steering Committee deliberated all the conditions and found that Monopoles are the most suitable

solution to these problems caused by the faster urbanized developments. As such, the proposal of BRPL

was agreed in-principle.

20. Shifting of 66 kV Rail Pole Malviya Nagar – Batra and Okhla – Batra on Monopoles(Table Agenda).

BRPL proposed for shifting of 66 kV Rail Pole Malviya Nagar – Batra and Okhla – Batra on Monopoles.

66/11 kV Batra Grid Substation has a capacity of 65 MVA (2x20 MVA + 1x25 MVA). It is providing power

supply to Tughlakabad Institutional Area, Batra Hospital, Tigri, Devli Extension Karni Singh Shooting Range

and Tara Apartment and other adjoining area.

Presently, 66/11 kV Batra Grid Substation is being fed from 220 kV Okhla and 66 kV Malviya Nagar with

single circuit Rail Pole line with ACSR Goat Conductor. Details are as under:

S.

No.

Name of the

circuit

Circuit configuration Route length Constraints

1 220kV Okhla to

Batra

Single Circuit Rail Pole line

ACSR Goat Conductor

2.7 Km approx. Forest Area, Low ground

clearance

2 Malviya Nagar to

Batra

Single Circuit Rail Pole line

ACSR Goat Conductor

5.2 Km approx. Residential Colonies and

Schools, Low ground clearance

The Okhla – Batra line is passing through the forest area and line clearance is low. Hence, it causes the difficulty

in maintaining the line. Similarly the Malviya Nagar – Batra line is passing through the Residential and School

areas of Pushp Vihar and forest area also. The section also has low ground clearance. It was also observed that

as per records available at 220kV Okhla S/Stn. , number of trippings occur on 66kV Malviya Nagar Rail Pole

Line obviously on transient faults due to low ground clearance.

The details of which are as under:

Tripping details of 66kV Malviya Nagar Rail Pole Batra at 220kV Okhla S/Stn. since April,2015 to till date

S

No. Name of Bay/Feeder

Tripping Restoration Relay

Date Time Date Time

1 66kV Rail Pole Batra 31.05.15 07:40 31.05.15 12:32 Dist. Prot. Z-I R Ph. Dist. 7 Km

2 66kV Rail Pole Batra 02.06.15 06:38 02.06.15 09:14 Dist. Prot. Z-II R Ph. Dist. 3.1Km, 67 NX

3 66kV Rail Pole Batra 19.06.15 18:48 19.06.15 22:10 Dist. Prot. Z-II B Ph. Dist. 3.7Km,E/F

4 66kV Rail Pole Batra 24.06.15 06:45 24.06.15 07:50 67 NX E/F


6 66kV Rail Pole Batra 10.08.15 23:11 11.08.15 12:35 Dist. Prot. Z-I R Ph. Dist. 1.2 Km

7 66kV Rail Pole Batra 16.08.15 14:55 16.08.15 16:00 E/F

8 66kV Rail Pole Batra 25.08.15 12:27 25.08.15 12:48 Dist. Prot. Z-I B Ph. Dist. 0.5 Km


10 66kV Rail Pole Batra 06.09.15 12:55 06.09.15 15:50 Dist. Prot. Z-I R Ph. Dist. 1.3 Km


12 66kV Rail Pole Batra 19.09.15 06:50 19.09.15 07:05 Dist. Prot. Z-II B Ph. Dist. 2.8 Km, E/F

13 66kV Rail Pole Batra 29.09.15 00:39 29.09.15 08:10 Dist. Prot. Z-II R Ph. Dist. 3 Km, E/F


15 66kV Rail Pole Batra 17.02.16 10:55 17.02.16 11:17 Due to PT supply Fail


17 66kV Rail Pole Batra 06.03.16 07:30 06.03.16 07:58 Dist. Prot. Z-I B Ph.


19 66kV Rail Pole Batra 03.04.16 14:35 03.04.16 14:45 Without Indication

20 66kV Rail Pole Batra 17.05.16 13:50 17.05.16 16:55 Dist. Prot. Z-I R Ph. & 186

To obviate the ground clearance and other maintenance issues, it has been proposed to shift the line with

Monopoles. Monopoles will provide an increased ground clearance and are cost economical solution.

The Steering Committee deliberated and agreed to the proposal in-principle.

21. Allocation of Bay No. 38 at 220kV IP Station

The matter was referred based on the letter dated 15.12.2015 received from DGM(EHV)P&C West , BRPL

Lajpat Nagar-III requesting the allocation of bay No. 38 at IP Station based on the discussion held in the

Steering Committee meeting on 30.01.2013 to feed Supreme Court Complex near Pragati Maidan. It was also

explained that the cable laying is almost complete. Accordingly, they were advised to resolve the commercial

formalities with NDMC who has been allocated the bay from IP Station to feed Connought Place which has not

been used since long. They were also told to obtain;

(i) Clearance from O&M and Protection Deptt. of DTL be obtained before energizing the feeder.

(ii) The route cable inside the S/Stn. shall be finalized in consultation with our O&M Deptt.

(iii) BSES shall carry out the necessary repair & maintenance in respect of any damage to the S/Stn.

(iv) Completion of commercial formalities as per Bulk Supply Agreement , if any

(v) Submission of line/cable parameters. .

BRPL informed that they will do the needful accordingly.

22. Connectivity of MSW Solutions Ltd.’s 24MW Plant to 220kV DSIDC Bawana Grid(MSW issue)

The representative of MSW’s gave the salient features of the plant as under:

01 MSW Power Plant capacity 24000 kW

02 No. of Boilers Two (2)

03 Design Capacity of Each Boiler 56TPH

04 Boiler Outlet Steam Parameters 45 kg/cm2(a)

400 5 °C

05 Pre-sorted MSW consumption 2 x 600 TPD

06 Main Fuel used in the power plant Pre-sorted MSW

07 Type of firing grate Reciprocating Step Grate

08 Flue Gas Treatment System Semi Dry Flue Gas treatment system with lime and

activated Carbon injection followed by Bag filter.

09 Turbo Generator capacity 24000 kW

10 No. of Turbo Generators installed One (1)

11 Turbo Generator type Single bleed cum condensing

12 Turbine inlet Steam Parameters 42 kg/cm2(a)

395 5 °C

13 Type of condensing equipment ACC

14 Generation voltage 11 kV

15 Export grid voltage 66 kV

16 Grid Interconnection DTL 220/66 KV Substation Bawana at Bay No:630

17 No. of generator transformers and capacity One (1)

11/66 KV

25/31.25 MVA

18 No. of Auxiliary transformers and capacity Three (3)

11/0.415 KV

2.5 MVA

19 Power Evacuation Through 66 KV Underground power cable

20 Type of chimney RCC

21 Chimney height 60 Mtrs

It was further intimated that DERC vide its order dated 29.04.2016 has issued certain directions to all utilities

including DTL and SLDC. The directions of the commission contained the para 9 of the order are as under;

Considering the issue of environmental hazards caused by the Municipal Solid Waste, the Commission feels it

imperative to set in motion the operationalization of the waste to energy plant of Delhi MSW at Bawana and

on the basis of aforesaid deliberations, the Commission makes the following orders:

The petitioner shall provide draft PPAs to the DISCOMs within 3 days from the date of order for procurement

of power generated from the waste to energy project of the petitioner at Bawana in the ratio as indicated

below-

DISCOMs Approved Energy Input for FY 2013-14(MU) Percentage

BRPL 11508.8 41.81%

BYPL 6577.38 23.90%

TPDDL 8039.94 29.21%

NDMC 1400.02 5.09%

Total 27526.14 100.00%

All Distribution Licensees, within one week thereafter, shall execute Power Purchase Agreement;

All Distribution Licensees shall submit the Power Purchase Agreement for approval to the Commission within

two weeks from the date of this order;

The SLDC and DTL shall take all necessary measures to facilitate the petitioner for enabling evacuation and

synchronization of its power plant with the Delhi STU grid; and

The respondents should file their reply to the petition for tariff determination within two weeks.

With the above directions the matter is adjourned the petition is listed for hearing on 17.05.2016.

DMSWL requested all utilities for executing the PPAs with tariff to be determined by DERC in compliance with

direction contained in the order dated 29.04.2016 as their plant is ready to synchronize by June,2016. They also

informed that the plant is very eco-friendly and would help to reduce the solid waste related pollution in Capital.

DMSWL has requested for the cooperation of all the utilities for safe, secure and stable operation of the said

waste to energy plant at Narela Bawana. DMSWL has also requested to draw out the methodology for

accounting of energy generated by the station during the period of test synchronization as well as further

operations including that during further course of operations in the post commercial operation of plant. It was

also opinioned by participants in the meeting that during trial operation, the rate of energy generation would be

that of the Deviation Settlement Mechanism. It is clarified that, the plant is a must run and all the energy

generation is to be consumed within the state as per the directions issued by the DERC. They informed that fuel

being solid waste is heterogeneous with seasonal variations all through the year and therefore result in

fluctuating power generation. Hence, under such circumstances, the Deviation Settlement Mechanism is not

applicable for such variable generation and that the tariff as determined by DERC shall be applicable. DMSWL

has also informed that it has submitted the prayer to this extent in its petition to DERC and the commission is

expected to give its direction soon in this regard. They further informed that with regard to directions to DTL,

the directions have been complied as the connectivity of the plant already been established with 220kV DSIDC

Narela Grid S/Stn. of DTL through a 66kV feeder on 07.03.16. They requested SLDC to allow to

synchronization of plant as and when requested with prior 3 day notice. Subsequently, DERC has issued an

order on 19.05.2016 indicating the following:

In exercise of powers vested under sub-section(zd), (ze) and(zf) of section181(2) read with Sections 61, 62 and

86 of Electricity Act 2003 (36 of 2003) and all powers enabling it in that behalf, the Delhi Electricity

Regulatory Commission for the purpose of specifying terms and conditions for Tariff determination from

Renewable Energy Sources in respect of Municipal Solid Waste(MSW), till further orders, adopts the Central

Electricity Regulatory Commission(Terms & Conditions for Tariff determination from Renewable Energy

Sources) Regulation , 2012 (Notified vide Notification No. L-1/94/CERC/2011 dated 06.02.2012) as amended

from time to time.

Steering Committee advised all utilities to do the needful as per the direction contained in the DERC

order dated 29.04.2016 and extend all possible steps to ensure safe, secure and stable operation of the

plant. DMSWL was also advised before test synchronization the protection system etc. be coordinated

with DTL’s Operation Service Wing. Other clearance may also be obtained before test synchronization.

23. Perspective Plan for the period 2016-17 to 2021-22 upto 33kV level.

DTL informed that in the meeting chaired by Mrs. Jyoti Arora, Joint Secretary(Transmission) Ministry of

Power, Govt. of India on 7th April, 2016 regarding 20 years perspective plan for States/UTs for intra state

transmission system upto 33kV level, it was decided that all the States to provide the information in the

following Performa within 16.05.2016 to CEA for vetting. It was also decided that the perspective plan upto the

year 2019 should be in line with that indicated by the States in the 24x7 Power For All (PFA) document of the

States. The communication plan should also be the integral part of the plan. The data is required to be submitted

in the following formats.

Format for submission of integrated perspective Transmission plan level for the period 2017-2022 to CEA

by the States.

Name of the State ___________________

Transmission Lines

Year wise Ckt. Km. of Transmission Lines planned to be added during the period 2017-22.

Year 400kV 220kV 132kV 66kV 33kV

Ckm Ckm Ckm Ckm Ckm

Upto March 17

2017-18

2018-19

2019-20

2020-21

2021-22

Total (17-22)

Total (Mar 22)

Name of the State_____________________

Sub-stations

Year wise transformation capacity to be added during the period 2017-22. Year 400kV 220kV 132kV 66kV 33kV

New S/s

(No &

MVA)

Augmentation

of existing S/s

(MVA)

New S/s

(No.&MVA)

Augmentation

of existing S/s

(MVA)

New S/s

(No &

MVA)

Augmentation

of existing S/s

(MVA)

New S/s (No

& MVA)

Augmentation

of existing S/s

(MVA)

New S/s

(No &

MVA)

Augmentatio

n of existing

S/s (MVA)

Upto Mar 17

2017-18

2018-19

2019-20

2020-21

2021-22

Total(17-22)

Total (Mar 22)

Name of the State_________

Intra-State Transmission Lines planned to be commissioned Voltage S.No. Name of the

transmission

line

Length

in ckm

Estimated

cost(Rs

crores)

Board & other

management

approvals in place

Funding

arrangement and

status of fund tie up

Status of placement

of construction and

other contracts

Target Year of

commissioning

Present status of

implementation/cr

iticalities if any

Details of

Communicati

on system

400kV 1

2

3

Total 400kV ckm

220kV 1

2

3

Total 220kV ckm

132kV 1

2

3

4

Name of the State__________

Intra-State transformation capacity planned to be commissioned

Voltage level

New

S/Stn/augmen

tation of

existing S/Stn.

S

No.

Name

of the

S/Stn.

Transfor

mation

voltage

level kV

Transformation

capacity

(MVA)

Estimated

cost

(Rs Cr.)

Board and other

management

approvals status

Funding

arrangement and

status with regard

to availability/tie

up of fund

Identificatio

n of site and

status of

possession

of land

Placement of

contracts for

equipment

material and

erection

Target year of

commissioning

Present status of

implementation/

criticalities if any

400kV 1 400/220

2 400/132

3

400kV

augmentation

existing sub-

stn

1 400/220

2 400/220

3 400/132

4

Total 400kV MVA

220kV New

S/Stn.

1 220/132

2 220/132

3 220/66

4 220/33

220kV 1 220/132

Augmentation

existing S/Stn.

2 220/66

3 220/33

4

Total 220kV MVA

132kV New

S/Stn.

1 132/66

2 132/33

3 132/11

132kV

Augmentation

existing S/Stn.

1 132/66

2 132/33

3 132/33

4 132/11

Total 132kV MVA

66kV new

S/Stns.

1 66/33

2 66/11

3 66/11

66kV

augmentation

existing S/Stn.

1

2

3

Total 66kV MVA

33kV new

sub-stns

1 33/11

2 33/11

3 33/11

33kV

augmentation

existing S/Stn.

1 33/11

2 33/11

3 33/11

Total 33kV MVA

It was also informed that the Secretary(Power), GNCTD advised to ensure the time line for providing the

data. All stake holders agreed to provide the data by 16.05.2016. Steering Committee advised to adhere

the time line to provide the data to System Study division of Planning Deptt.

24. Supply arrangement for DMRC for their upcoming Ph-IV expansion project(Indraprastha RSS)

In the Steering Committee meeting held on 10.03.2016, it was decided to allocate two 220kV bays from

400/220kV ISTS at IP to accommodate DMRC’s Ph-IV expansion project (Indraprastha RSS) due to non

availability of 66kV levels at RPH/IP Station. Supply to the project is required by 2019-20. Considering the

delay of ISTS and lesser requirement of DMRC, it was felt in the Steering Committee meeting held on

06.05.2016 that the decision of allocation 2 bays (220kV) from 400/220kV IP be relook. It was also decide that

to explore the possibility of allocation of additional 2 Nos. 66kV bays to DMRC from adjacent 66kV yard of

GT Station a site visit be conducted at 66kV switchyard at GTPS. Accordingly, a site visit was arranged on

10.05.2016 wherein representatives of DTL, BYPL and IPGCL participated. Despite request to Sh. S N

Aggarawal, Chief Engineer (DMRC) to participate the visit, none from DMRC attended the site visit.

During the visit it was observed that there is no space available for construction of new bays in the 66kV

switchyard of GTPS and to install /retrofit control & relay panel in the control room. It was also clarified by the

IPGCL representative that GTPS has been facing the consequences of (-)ve sequence current due to unbalance

loading of DMRC existing feeders. Addition of two more 66kV feeders may aggravate consequences of (-)ve

sequence current due to unbalance loading further that may prove detrimental to the operations of generating

units. The problem would be acute at the time of islanding of GT Station in the grave exigency conditions.

As such, it was concluded that no additional bay can be provided to DMRC from 66kV GTPS switchyard.

ATTENDANCE SHEET

List of participants attended the 1st Steering Committee Meeting of 2016-2017

held on 06.05.2016 at 10.30 AM in the office of GM(Planning)

S.

No.

Name of the

Officer (Shri/Sh.)

Designation Organization Contact

No.

E-mail address

1. V Venugopal GM(Plg.) DTL 9871093902 [email protected]

2. Satyendra Prakash AGM(T)COS IPGCL/PPCL 9717694813 [email protected]

3. Suresh Kumar AE E/M MES 9873802301 [email protected]

4. Atul kumar Singh AM 9597556694 [email protected]

5. Neelesh Gupta DGM(Comm.) TOWMCL 9873930842 [email protected]

6. Rahul Mishra Sr. Engr. TOWMCL 8750049801 [email protected]

7. Kishan Pal ASVP BYPL 9312667177 [email protected]

8. Deepak Singh Sr. Manager TPDDL 9971393893 deepak.singh @tatapower.com

9. Pourush Singh Asstt.G. Manager TPDDL 9971395283 [email protected]

10. S Sutradhar DGM(D&E) DTL 9999533671 [email protected]

11. Poonam Rathore AM(T) to GM(Plg.) DTL 9999533915 [email protected]

12. Roop Singh DGM(T)Plg. DTL 9999533674 [email protected]

13. P K Tayal Mgr.(T)CE&STU DTL 9999533823 [email protected]

14. Abhinav Srivastava DGM BRPL 9350134826 [email protected]

15. Prem gomber ASVP BYPL 9312782565 [email protected]

16. M.P.Singh AEE NDMC 9868889692 mp.singh26@yahoo

17. S.R. Varshney EE(P.33KV) NDMC 9910421187 eep33.elect@ndmc

18. Meher Deep Verma AM(T)Plg. DTL 9540066888 gov.in

19. Iype George General Manager DSMWL(Ramky Enviro Engrs. Ltd) 09599196831 [email protected]

20. D V Seetharama Roa Mgr(WTE) DSMWL(Ramky Enviro Engrs. Ltd) 07893954445 [email protected]

mailto:[email protected]

mailto:[email protected]

minutes of st1 steering committee meeting thof … of...2016/05/06 · minutes of st1 steering...

Documents