first below ground traction at church road anook k gupta

8/18/2019 First Below Ground Traction at Church Road Anook K Gupta

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First Below Groundirst Below Groundirst Below Groundirst Below Ground

Tractionractionractionraction Substation at Church Roadubstation at Church Roadubstation at Church Roadubstation at Church Road

New Delhi) Receiving SubstationNew Delhi) Receiving SubstationNew Delhi) Receiving SubstationNew Delhi) Receiving Substation

A case Studycase Studycase Studycase Study

By:

Anoop Kumar Gupta, Director (Electrical)

Mahendra Kumar, Chief General Manager

http://www.delhimetrorail.com/Default.aspx


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This presentation covers -

About DMRC

Progress/achievements so far Status of Phase III

Operational Highlights

Power Supply Arrangement in DMRC

Power Supply requirement

Power System Architecture

Contract Demand and Energy Consumption

Construction of below ground Substation Challenges faced

Layout Plan

Glimpses of the site

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http://www.delhimetrorail.com/Default.aspxhttp://www.delhimetrorail.com/Default.aspx


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About DMRCAbout DMRC

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DELHI METRO RAIL CORPORATION (DMRC)

• Set up in May’95 under the Indian Company Act.

• A joint venture between the GOI and the GNCT Delhi,

with equal equity.

• DMRC has the responsibility for construction andoperation of Delhi Metro.

• A Master Plan had been drawn up for Delhi Metro

expansion, consisting of 12 lines, covering 420 kms to

be completed by 2021 in four Phases.



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DMRC – PROGRESS/ ACHIEVEMENTS SO FAR

• Phase-I – 65 kms Completed in 7 years and 3 months(2 years & 9 months ahead of schedule).

• Phase-II – 125 kms -- Though double the length,

completed in half the period taken for Phase-I, and fivemonths ahead of schedule.

• Phase III - 136 km Sanctioned in Sept 11 and has been

committed to the Govt. for completion in 4.5 years.



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Phase IIIPhase III



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STATUS OF PHASE-III

• Further expansion by 136 kms. 110 km (50 km U/G) inDelhi & 26 km in Haryana (14 km) Line-6 Badarpur to

YMCA Chowk, Faridabad & (12 km) Mundka to

Bahadurgarh.

• The contracts are in place and the work is in progress.

• For the first section Trial run was flagged off in

December 2013 for the CTST- Mandi house corridor

of phase III



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STATUS OF PHASE-III

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• Phase-III likely to be completed by 2016

• On completion of Phase-III Delhi will have a

metro network covering 326 kms.

• Delhi is the fastest growing metro network

in the world outside China.



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Operational HighlightsOperational Highlights



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• DMRC is having 142 Stations and 190 Km in operation. This is

including high speed Airport Express line having 6 stationsand 23 km section.

• About 2800 train trips a day – with 208 train sets (1100

Coaches) on 6 lines.

• Each train used to consist of 4 coaches. With the increase in

commuters, the trains are progressively being lengthened to

6 coaches and finally to 8 coaches. We have already near

about 100 six car sets.

• Average Ridership – more than 2.3 million passengers per

day. (meaning about 1,00,000 vehicles off the road)

OPERATION HIGHLIGHTS



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Frequency during peak hours – 2 m 40 sec on 2 out of 6 lines

(on other lines 3 to 5 mts).

DMRC has around 7,000 employees, besides contract staff.

Op. Ratio 62%

Fare : From 8/- to 30/-. The system is making an

operational profit from Day-1.

DMRC is able to service and pay back the loans despite nosubsidy from the Government and the Fare Structure being

lowest in the world except Kolkata.



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•

20% of DMRC’s revenue is from Non-operational sources –mainly real estate development and advertisements.

• The system is fully Barrier Free for Physically challenged.

• The trains operate from 6 AM to 11 PM.

• DMRC has introduced feeder bus short loop services to help

the commuters.

• Punctuality measured with a least count of 60 sec and the

punctuality percentage has been above 99%.




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DWARKA

L A X M I N A G A R

Y A M U N A B A N K

N I R M A N V I H A R

P R E E T V I H A R

K A R K A R D U M A

BOTANICAL GARDEN

GOLF COURSE

NOIDA CITY CENTRE

DHAULA KUAN

DELHI AEROCITY

DWARKA SEC 21

A S H R A M

S R I N I V A S P U R I

`

KALINDI KUNJ

PALAM

DHSRATH PURI

DABRI MOR

BOTANICAL GARDEN

DELHI GATE

JAMA MASJID

LAL QUILA

•PHASE –I = 65.1Km

•PHASE –II = 125.0 Km

•

Phase –

III = 136.0 KmTotal = 326.0 Km



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Power Supply ArrangementsPower Supply Arrangements

in DMRCin DMRC

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• Electricity is required for:

Running of trains,

Station services

• Power requirements are determined by peak-hour demands

of power for traction and auxiliary applications.

• Broad estimation of auxiliary and traction power demand is

made based on :

Regeneration by rolling stock – Up to 35%

Elevated station load – about 500 KW

underground station is assessed at about 3.2 MW



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• From the reliability point of view Power supply at 220 kV, 132

kV or 66 kV level is taken from the Grid Sub Stations of

DTL/UPPCL/HVPN.

• At the RSS it is stepped down to 25 kV to feed the OHE with

single phase traction transformers and 33 kV with 3 phase

auxiliary transformers to feed the auxiliary requirements. Bothare with 100% standby capacity.

• 33 kV is distributed through duplicate ring feeders along the

corridor and at every station it is stepped down to 400 volts(3 phase supply) through dry type transformers. This

substation is termed as Auxiliary Substation (ASS) in our

system. This is distributed in the station to meet the power

supply requirements of the stations.



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POWER SYSTEM ARCHITECTURE

• DMRC is taking power supply through two incomers

through underground cables.

• In case of failure in one incoming circuit the other

cable will be able to take full load.

• Power failure from one RSS , adjacent RSS can takefull load

• Failure of one transformer, the standby can take the

full load.

Thus adequate redundancy has been built in at all stages

from the reliability point of view

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POWER SUPPLY IN DMRC

Incoming power supply from Grid 220/132/66000KV

Transformers

25000

volts

33000

volts

25000

volts

33000

volts

To DMRC line



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CONTRACT DEMAND & ENERGY CONSUMPTION SINCE 2006-07

S. No. AS ONCONTRACT DEMAND

in MVA% increase

1 31.03.2007 47

2 31.03.2008 52 10.6 %

3 31.03.2009 52 10.6%

4 31.03.2010 75.5 58.5%

5 31.03.2011 115 144.6%

6 31.03.2012 130 176.5%

7 31.03.2013 138 193.6%

8 AS ON 01.08.2013 141 200%

CONTRACT DEMAND



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ENERGY CONSUMPTION

S.No Financial Year MU % increase

AMOUNT PAID

in million

1 2006-2007 189.52 480.60

2 2007-2008 199.61 10.5 514.80

3 2008-2009 220.14 16.15 707.20

4 2009-2010 254.49 34.33 832.29

5 2010-2011 422.73 123.05 1390.05

6 2011-2012 577.56 204.7 2139.24

7 2012-2013 596.69 214.84 3198.61

8 2013-14

upto Oct-13410.33 271.17 2554.09



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Rss in phase-1

LINE RSSIncoming

Voltage

LINE-1 KASHMERE GATE 220 kV

LINE-1 RITHALA 66 kV

LINE-2 NEW DELHI 66 kV

LINE-3 DWARKA 66 kV

LINE-3 SUBHASH NAGAR 66 kV

LINE-3 INDRAPRASTHA 66 kV

TOTAL 6 SUBSTATIONS

RSS IN PHASE I



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LINE RSS Incoming Voltage

LINE-2 • JAHANGIRPURI,

• CHHATARPUR

• SUSHANT LOK (HCC)

• 66 kV

• 66 kV

• 66 kV

LINE-3 • BOTANICAL GARDEN • 132 kV

LINE-5 • MUNDKA • 66kV

LINE-6 • SARITA VIHAR

• PARK STREET (CTST)

• 66 kV

• 66 kV

AIRPORT LINE • PARK STREET (CTST)• AIRPORT

• 66 kV• 66 kV

TOTAL 8 SUBSTATIONS

RSS IN PHASE II



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NEW Rss in phase-3

LINE RSSIncoming

VoltageSTATUS

LINE-5 • MIE DEPOT RSS • 132 kV • Contract opening on 10.12.13

LINE-6 • KASHMERE

GATE

• FARIDABAD

• 220 kV

• 66 kV

• Power from existing Cables of

Phase I RSS of DMRC

• Work in process

LINE -7 • MUKUNDPUR

• DHAULA KUAN

• INA

• VINOD NAGAR

• YAMUNA VIHAR

• 66 kV

• 66 kV

• 66 kV

• 66 kV

• 66 kV

• Gopalpur DTL by 2016-17contingency from JP RSS

• One from Ridge valley + One

Park street

• From RK Puram RSS of DMRC

for One Circuit

• Two Circuits from Gazipur

• Power not available at Harsh

Vihar DTL

STATUS OF RSS IN PHASE III

To be contd ….



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LINE RSSIncoming

VoltageSTATUS

LINE -8 • KALKAJI

• RKPURAM

• PALAM

• 66 kV

• 66 kV

• 66 kV

• One from Sarita Vihar DTL and2nd LILO of Existing

• One Ckt from Vasant Kunj and

second incomer being taken to

INA RSS

• No Ckt from Papankalan 3-

• Existing Subhas nagar to be

made LILO and 2nd ckt when

PPN 3 comes up

TOTAL 11 SUBSTATIONS

Contd ….



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AUGMENTATION WORKS of RSS IN PHASE - III

LINE RSS

LINE-2 • JAHANGIRPURI

(One Trafo of 131 MVA -220/66 kV)

LINE-3 • BOTANICAL GARDEN

(2 nos 25 kV bays added)



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Construction of belowConstruction of belowGround SubstationGround Substation



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Construction of the Sub-Station at Church Road

• Line-6 and Airport Express Line in phase II were to be

fed from this RSS• The incoming supply was to come from Park Street

S/s of DTL 1.6 kms away

• Plot size of 5000 sqmts

• Tender was awarded for a normal RSS and materials

procured

• Being close to Rastrapati Bhawan it required

clearance from Central vista Committee• CVC desired that no part of the substation should be

above ground, except boundary wallTo be contd …



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• The building housing GIS Hall and Control room shall

be 0.3 m high only from the road level.• The top of the roof may be landscaped to present a

green appearance and the height of solid portion of

boundary wall should be 1m high only

• Baffle wall only 1.2 m high from road level

• The layout was redesigned with incoming 66 kV cable

gallery at -9 m, GIS hall at -7 m level and transformer

yard at -6m level.

Contd …



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LAYOUT PLAN



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ELEVATION



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ELEVATION



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Challenges facedChallenges faced



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Challenges faced

• Maintaining the clearances both in the vertical as well as

horizontal direction in the transformer bay was required.

• Ventilation for the underground substation- Forced

ventilation system for the equipment rooms was adopted -

Three AHU’s (2 Main + 1 Standby) have been provided

considering 15 Air changes per hour.

• Water drainage system for this catchment area. The cables

trenches were designed with hangers at a height of 300 mm

from the bottom on which the cables were laid and thebottom portion was used for draining the water to the water

tank with natural gravity towards the water collection tank.

To be contd …

C td



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• Smoke detectors have been provided in the cable trenches in

the - 9 m area and the yard.

• Precision type Floor mounted Air-conditioning system has

been provided for the cooling of Control & Relay room and

the server rooms with the arrangement of two main and one

standby AC units

• Water pumping arrangement has been made such that the

system can pump out 1 lakh liters of water in one hour

keeping in account the catchment area. Automation has

been provided with three pumps. The first pump operates at

25%, second pump at 50% and the third pump at 85% of the

water being filled up in the water tank.

Contd …

To be contd …

C td



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• The soil resistivity of the substation indicated that soil is

having three layers with upper layer having low resistivity,

middle layer having high resistivity and bottom layer again lowresistivity.

• Upper strata is having low soil resistivity of 73 ohm-m, Middle

strata is having very high soil resistivity of 783 ohm-m andLower strata is again low resistivity of 63.2 ohm-m.

• For better performance of grounding system, grid is placed in

low resistivity soil and analysis has been done using Auto Grid

Pro software package. Satellite earthing had to be adopted

since mother earth was not available for the electrodes

Contd …

To be contd …

C td



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• A DG set of capacity 125 kVA has been provided at a higher

platform to meet out the emergency power requirement in

case of power supply failure to run the ancillary system of thesubstation.

• Substation Automation based on Intelligent Electronic Device

on IEC 61850 has been provided for control and protection of the system.

• This substation is first of its kind with unique layout below

ground level.

• Each bay comprises of one circuit breaker and associated

disconnectors, earth switches and instrument transformers.

Contd …

To be contd …



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• At bay level, the IEDs provide all bay level functions likecontrol (commands outputs), monitoring (status indications,measured values).

• The IEDs are directly connected to the switchgear avoidingthe need for additional interposing of transducers.

• Each bay control IED is independent of the others and itsfunctioning is not affected by any fault occurring in any of theother bay control units of the substation.

• The data exchange among bay level IED’s, and between baylevel and substation level take place via dual fiber-optic interbay bus according to IEC 61850-8-1 protocol. 37

Contd …



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Station Level

• Human Machine Interface enables local station control and

monitoring through the vendor software package compatiblewith IEC 61850.

• DMRC Substation bays are limited the bay bus arrangementprovides independent station-to-bay and bay-to-bay data

exchange.

• Substation Configuration Language (SCL) facilitatesintegration of the system by the users/operators and can beused without detailed knowledge of real-time systems.

• An authorization mechanism has been provided to preventsystem access to unauthorized users



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OCC Level

• IEC 61850 signals are converted to IEC 60870-

5-101 signals through a software based

gateway for communication from the substationto the OCC.

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Glimpses of the SiteGlimpses of the Site



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Before execution of the Below ground



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View of the Rashtrapati Bhawan



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CLEARANCES PLACEMENT OF THE DG SET

GIS H ll With V til ti A t



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GIS Hall With Ventilation Arrangement



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Views of landscape of the RSS



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Full View of the RSS



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CONCLUSION

Space has been a constraint for all the urban

cities. Now attempt is being made to

accommodate the RSS in a smaller space by using

GIS for the incomer yard, 33kV network and the

25 kV traction network. In one of the substationseven 25 kV AIS is being designed to make it

indoor below the control room from the cost

economics point of view . Study is under progress

to consider Hybrid Substation also where space is

a constraint.



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Thank You !!

DMRC Ltd.Metro Bhawan,

Fire Brigade Lane,

Barakhamba Road,

New Delhi - 110 003.

first below ground traction at church road anook k gupta

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