The peak demand in Mumbai is expected to increase up to 4,234 MW, from 3,910 MW currently. Additional feed from other 400/765 kV substations and an high voltage direct current (HVDC) link have been proposed to remove existing transmission capacity constraints and meet the city’s increased demand.
Two key projects—Sterlite Power’s Mumbai Urja Marg project and Adani Transmission’s Aarey–Kudus HVDC transmission line—have been proposed to improve power supply to the city. The Mumbai Urja Marg project will bring in 2,000 MW of additional power by December 2023. It entails the 400 kV Padgha–Kharghar line, the 400 kV Padgha–Navi Mumbai lines and the 220 kV Apta–Taloja line. Another 1,000 MW will be supplied to Mumbai in 2025-26 when the Aarey–Kudus HVDC transmission line is completed. Though the project has received a favourable ruling from the Appellate Tribunal for Electricity (APTEL), the state regulator Maharashtra Electricity Regulatory Commission is yet to approve substations at Aarey.