REC Power Development and Consultancy (RECPDCL) has announced the winner of its auction to set up an interstate transmission system to evacuate 6 GW of solar power from the Barmer-II pooling substation in Rajasthan.

Power Grid Corporation of India (POWERGRID) has secured the transmission project at annual transmission charges of ₹32.44 billion (~$342.49 million).

Apart from POWERGRID, Adani Energy Solutions, DRAIPL-CG Transmission Consortium (consisting of Dineshchandra R. Agrawal Infracon and Cube Grid Investments), Resonia, and Terralight Solar Energy Nangla qualified in the technical bid round.

The tender was floated in January 2026.

RECPDCL stated that connectivity for approximately 6 GW has already been granted at the Barmer-II substation.

The project will be developed on a build, own, operate, and transfer basis and must be completed within 54 months.

The scope of work includes establishing a 400/220 kV, 6×500 MVA substation at a suitable location near Barmer (Barmer-II Substation), along with two 125 MVAr bus reactors. It also entails providing for future 400 kV line bays, including switchable line reactors, 400 kV line bays, and a 400 kV bus reactor, along with associated bays.

POWERGRID must ensure future provision for a 400/220 kV interconnecting transformer, including bays, 400 kV sectionalization bays, and 220 kV line bays

The scope of work also includes creating provision for the future development of a 220 kV sectionalization bay, a 220 kV bus coupler, synchronous condenser units at the 400 kV level, two 400 kV bays, and a static synchronous compensator, along with associated 400 kV bays.

The project covers the line-in and line-out of both circuits of the 400 kV Fatehgarh-IV PS–Barmer PS D/C line at the Barmer-II substation, as well as the construction of a 400 kV D/C line from Barmer-II PS to Barmer-I PS.

POWERGRID must establish a 6,000 MW, 800 kV Barmer-II high-voltage direct current (HVDC) terminal station at a suitable location near the Barmer-II substation.

In addition, the scope includes establishing a 6,000 MW, 800 kV South Kalamb HVDC terminal station at a suitable location south of Kalamb, along with an 800 kV HVDC bipole line between Barmer-II and South Kalamb.

Successful bidders must augment the South Kalamb substation and install two syncon units at the 400 kV level of the Barmer-II power station.

In July 2026, RECPDCL announced the winner of the auction to develop an ISTS to augment the Bhadla-III, Ramgarh pooling station, and Kanpur substation, enabling evacuation of 20 GW of renewable power in Rajasthan.