Power Grid Corporation of India Ltd (PGCIL) has commissioned a major interstate transmission system (ISTS) scheme in Gujarat that it was awarded under the regulated tariff mechanism (RTM) route.
In a brief stock exchange filing, PGCIL said that the project “Transmission Network Expansion in Gujarat to increase ATC from ISTS, Part – B” has been commissioned with effect from May 13, 2026, for which confirmation with respect to Notification for Commercial Operation (DOCO or date of commercial operation) was received on June 3, 2026.
According to information available from other official sources, the said project was approved by the National Committee on Transmission (NCT) in December 2021. It was awarded to PGCIL on RTM basis, in around July 2022, with an original completion timeframe of June 2023 and an estimated outlay of Rs.2,077 crore.
The project, with a completion cost now estimated at Rs.4,546 crore, aims at improving Gujarat’s available transfer capacity (ATC) from the ISTS network.
The main transmission lines associated with this project are:
- 400kV double-circuit (Twin HTLS) Navsari (New) (South Gujarat) – Magarwada line [192 ckm]
- 400kV double-circuit (Twin HTLS) Navsari (New) (South Gujarat) – Kala line [284 ckm]
- 765kV double-circuit Navsari (New) (South Gujarat) GIS – Padghe (GIS) [452 ckm]
The pivotal transmission element is the Navsari (New) (South Gujarat) GIS substation with total transformation capacity of 4,500 MVA coming from 765/400kV, 2×1500 MVA and 400/220kV, 3×500 MVA interconnecting transformers (ICT). The project also included augmentation of PGCIL’s existing Padghe GIS substation in Maharashtra by adding a 1×1500 MVA, 765/400kV ICT.
While all the elements of this scheme were progressively commissioned between March 2025 and March 2026, completion of transmission line #2 listed above in May 2026 led to full project completion.
Other components
It is further learnt that the overarching “Transmission Network Expansion in Gujarat to increase ATC from ISTS” scheme also had two other relatively smaller components – Part A and Part C. Both these were similarly awarded to PGCIL under RTM and have since been commissioned. These components collectively aimed at augmentation of transformation capacity at PGCIL’s existing 765/400kV substations in Gujarat – Vadodara and Banaskantha.
Also read: PGCIL completes first phase of consolidating TBCB subsidiaries
Featured photograph (source: Bajel Projects) shows part of the 400kV Navsari-Magarwada line commissioned by Bajel Projects for PGCIL.