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Mumbai Transmission Business Overview
Arvind Kumar SharmaReliance Infrastructure Ltd.
Date: 24th Feb, 2015
A model for Urban Transmission
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Confidential Slide
Overview of Mumbai Transmission
Experience of EHV Cable management in Sub-station
Operation & Maintenance in Urban scenario
Content
2
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Confidential Slide
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Confidential Slide
Aarey Versova Ghodbunder
1475MVA (1995-2009)
Transmission to evacuate 500MW from DTPS
Total Tx line = 480 Ckt Km
Transmission to Cater increasing Power demand of Mumbai
Total Tx line = 480 Ckt KmTotal 220kV Cable length = 168
KmsTotal load cater = 1200MW
Aarey Versova Ghodbunder Goregaon Saki Gorai REL- Borivali
Chembur
1500MVA (2010-2012)
1475MVA (1995-2009)
220kV EHV Sub-station
Mumbai Transmission
Very Sensitive consumer base
Load growth Redevelopment of Chawls
Vertical growth of real state allover the city (Buildings to
multi-storey towers)
Change in lifestyle (Increase in air-conditioning & House
hold loads)
Accelerated commercial load growth due to malls, multiplexes,
etc
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Confidential
Slide
-Construction initiated
- First 220 KV GIS
- Capacity up gradation in existing stations = 1475 MVA
- GFA = Rs. 436 Crs.
2009-10
- Addition of 3 nos. 125 MVA Xmers (375 MVA)
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-Evacuation of DTPS
Initiated for DTPS evacuation
1995-2005
- 485 ckt kms 220Kv line
- 3 EHV stn, 900MVA
- First ARR
- MSTCL Boi interconnection (~200MW additional power)
- System Strengthening scheme
- GFA = Rs. 300 Crs.
2006-08
- Addition of 2 nos. 100 MVA Xmers (200 MVA)
Transmission licensee
2011-13
- Addition of 55 ckt kms 220Kv Cables
- 5 New EHV Stn, Addition of 1500 MVA
- 5 more EHV stations commissioned
- Total Transformation capacity = 3000 MVA
- Total Tr, Line = 485 Ckt. Kms
- 220kV Cable = 56 Ckt. Kms
- 25 years license received (16th August, 2011)
Journey so far (Major milestones)
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Confidential Slide
Overview of Mumbai Transmission System
MVA Capacity 3000 MVA
Total OH Line Length 480 Ckt Kms
220 kV Substation 08 Nos.
33 kV System Reliability (For FY 2014-15)
99.99 %
System Availability (FY2014-15) 99.77%
Asset Base (FY 2014-15) Rs. 1379 Crs
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Total Cable Length 168 Kms
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Confidential Slide
Google image at scale 70
Conventional AIS Versova EHV Station - Plot area (40,000 Sq
Mtr)
EHV Sub-Station: Paradigm shift
Innovative GIS Goregaon EHV Station -Plot area (4,000 Sq.
Mtr.)Innovative Vertical Configuration
Space constraint for new AIS EHV station
220kV GIS EHV Stations, Build in just 10% of space required by
conventional EHV station
220kV Cable cellar
220kV GIS
11/33kV Cable cellar
11/33kV GIS
Auxiliary supply, control room
Office floor
11/33kV Capacitor
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Confidential Slide
PWD
Architect
Police
Collector NOC
SWD
CC / IOD/OC
STU
Tree
Cutting
RTO
MCGM
CFO
MERC
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3
4
5
67
8
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10
11
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Approvals
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Stringent Statutory Compliances
EHV cables & Sub-Stations
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Confidential Slide
Stringent Statutory Compliances
EHV Sub-Stations
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Confidential Slide
Sustainable Quality Culture
Integrated Management System (IMS)
Journey towards excellence
5S
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Confidential Slide 11
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Confidential Slide
Mumbai: Future Power Scenario
Existing corridor capacity: ~1500MW
Demand Source: STU 5Yr plan upto 2019-20
Demand: ~4800 MW
TPC-G: 1877 MWDTPS-G: 500 MW
Purchases: ~2400 MW (Yr-2020)
Bringing Bulk power challenges:-
Upgrading existing Corridor Long outage N-1 will not be
available even after up-gradation
New AC/DC OH lines Extremely difficult RoW (Mangroves, Forest,
high-rise buildings, etc.) Even with tubular towers electrical
clearances are very difficult
U/G AC Cable Not possible for long distance
U/G DC Cable Feasible Best suited for city infeed
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Confidential Slide
HVDC with Underground Cable
Independent control of active and reactive power
Black start capability in case of grid collapse
No contribution to short circuit levels Less Space required
Inherent STATCOM feature to support
flicker controlCable friendly technology
VSC HVDC: Suited for Island city Infeed
Cost of EHV DC Cable, A Challenge
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Mumbai Transmission : Aiming for world class standards in
Transmission
Thank you
[email protected]
Mumbai Transmission Business OverviewSlide Number 2Slide Number
3Slide Number 4Slide Number 5Slide Number 6EHV Sub-Station:
Paradigm shiftSlide Number 8Slide Number 9Sustainable Quality
CultureSlide Number 11Slide Number 12Slide Number 13Slide Number
14
