21 June,2026 07:04 PM IST | Mumbai | mid-day online correspondent
Tata Power will also upgrade 10 existing 110 kV transmission corridors to 220 kV capacity. Representational Pic
Tata Power has announced a Rs 15,000 crore transmission network expansion plan for the Mumbai Metropolitan Region (MMR), including the development of a 400 kV ring network across Mumbai and the addition of nine new Extra High Voltage (EHV) substations by FY31.
The company said the project is aimed at strengthening Mumbai's power infrastructure and meeting the region's rapidly growing electricity demand, which is projected to increase from 4,642 MW in 2026 to 6,500 MW by 2031.
At the core of the expansion plan is a 400 kV transmission ring connecting Vikhroli, Dharavi, Mahalaxmi, Sewree and Trombay, along with a 765 kV link to Dolvi. The proposed network is expected to significantly enhance Mumbai's ability to import power from the national grid and integrate large-scale renewable energy sources.
According to Tata Power, the ring network will provide a stronger transmission backbone, enabling efficient power distribution across key load centres in the city.
As part of the project, Tata Power will establish nine new EHV substations at Dharavi, Worli, Raymond, Kailash Nagar, Palaspe Phata, Calridges, Godrej, Taddeo and Badlapur.
The company said the substations are being strategically located within major load centres to support both distribution companies (DISCOMs) and large power consumers, including upcoming data centres.
Tata Power will also upgrade 10 existing 110 kV transmission corridors to 220 kV capacity, including key routes such as Dharavi-Mahalaxmi, Mahalaxmi-Backbay, Carnac-Backbay, Bhokarpada-Karanjade, Khopoli-Bhokarpada and Bhivpuri-Ambernath.
Additionally, eight existing substations at Bhivpuri, Khopoli, Powai, Parel, Kalyan, Ambernath, Vikhroli and Kolshet will be upgraded from 110 kV to 220 kV. The Kolshet station will also be interconnected with the Maharashtra State Electricity Transmission Company Limited (MSETCL) network.
By FY31, Tata Power's transmission network in Mumbai is expected to expand from 32 substations to 50 substations, while transmission line length will increase from 1,417 circuit kilometres to 1,950 circuit kilometres.
The number of transmission bays will rise from 1,687 to 2,085, while transformation capacity will increase by 63 per cent, from 11,700 MVA to 19,000 MVA.
The company said the expansion is necessary to support the region's growing demand driven by data centres, metro rail expansion, redevelopment projects and large-scale infrastructure developments across the Mumbai Metropolitan Region.
