Power Grid Corporation of India Limited has been declared the successful bidder for an inter-state transmission system designed to evacuate 6 GW of solar power from the Barmer-II pooling station in Rajasthan. POWERGRID received the Letter of Intent on 2 September 2026 after a tariff-based competitive bidding process coordinated by REC Power Development and Consultancy Limited. The project will connect Barmer-II with South Kalamb in Maharashtra through an approximately 1,000-kilometre, +/- 800 kV high-voltage direct-current corridor, supported by converter terminals, substation augmentation, 400 kV links and synchronous condensers. It is a major enabling investment for moving large volumes of Rajasthan’s solar generation to demand centres beyond the state.
A 6 GW Solar-Evacuation Award
The scheme is formally identified as the transmission system for evacuation of power from Rajasthan Renewable Energy Zone Phase IV, Part 5, in the Barmer complex, with Barmer-II configured for 6 GW of solar. POWERGRID will develop the asset on a build, own, operate and transfer basis. Its quoted annual transmission charges are Rs 3,244.33 crore. The award moves the project from competitive selection toward transfer of the project company, detailed execution and eventual operation under the applicable transmission-service arrangements.
The scale is important because generation capacity has value only when power can reach customers without being trapped behind network constraints. Rajasthan has some of India’s strongest solar resources and a large development pipeline, but new plants require pooling substations and long-distance corridors that are ready in step with commissioning. A dedicated 6 GW evacuation scheme creates a clearer route for developers connecting around Barmer-II and strengthens the wider planning framework for Rajasthan’s renewable-energy zones.
HVDC Creates a Long-Distance Power Highway
The project includes 6,000 MW, +/- 800 kV HVDC terminals at Barmer-II in Rajasthan and South Kalamb in Maharashtra, together with augmentation of the South Kalamb substation. An approximately 1,000-kilometre HVDC bipole line will traverse Rajasthan, Gujarat and Maharashtra. The scope also includes 400 kV transmission lines in Rajasthan and their associated bays. This combination links the solar collection area to the national grid at a scale suited to bulk transfer across a long distance.
HVDC is particularly relevant when a large, concentrated power flow must travel between distant regions. Direct-current transfer can provide controllable power movement and avoid some of the reactive-power and stability limitations that shape long alternating-current routes. The converter terminals are therefore central assets, not simply endpoints. Their design, controls, protection and coordination with the surrounding AC network will determine how reliably the corridor can carry variable solar output under normal and contingency conditions.
Synchronous Condensers Add System Strength
Two synchronous-condenser units are planned at the Barmer-II pooling station with associated bays. A synchronous condenser is a rotating electrical machine that does not generate active power but can provide reactive power, voltage support, short-circuit strength and physical inertia. Those characteristics become increasingly useful in areas where a high share of generation is connected through power-electronic inverters rather than conventional synchronous generators.
The equipment should help the pooling station maintain a stronger voltage reference and support protection performance as solar capacity grows. Its value will depend on correct sizing, dynamic studies and coordinated control with HVDC converters, static compensation and inverter settings at the connected plants. Commissioning tests should demonstrate the combined response of these assets rather than assessing each component in isolation. Barmer-II will function as an integrated grid node whose behaviour matters well beyond its fence line.
Competitive Transmission Procurement Sets Long-Term Obligations
The tariff-based competitive bidding model selects a transmission service provider using a defined technical scope and competitively quoted transmission charges. The BOOT structure then places construction, financing, ownership and operation responsibilities with the winning bidder for the contracted period before transfer under the governing documents. For solar developers, this separates the shared network from individual generation projects while providing a common delivery route to the inter-state system.
Annual charges must support far more than the initial construction programme. They must cover financing, maintenance, spares, control systems, towers, line patrols, converter-station operations and availability obligations over a long asset life. The commercial result is therefore linked to lifecycle execution. High availability will be essential because a forced outage on a 6 GW corridor can affect multiple generators and receiving regions at once. Redundancy, outage planning and rapid restoration capability will be important operating priorities.
Execution Will Span Three States
A roughly 1,000-kilometre route across Rajasthan, Gujarat and Maharashtra creates a substantial delivery programme. Surveying, tower spotting, land access, right-of-way coordination, environmental permissions, equipment manufacturing, logistics and construction sequencing will all influence the schedule. The HVDC terminals also require large civil works and specialised equipment whose factory testing and site integration must be aligned with the overhead-line packages.
The Project Extends Rajasthan’s Solar Reach
The wider market significance is the transition from project-by-project evacuation to network planning at renewable-zone scale. A 6 GW corridor can support multiple solar projects and enable power to be contracted across state boundaries. It also shows why transmission, grid-strength equipment and generation must be treated as one deployment programme. India can add module and plant capacity rapidly, but dependable delivery requires equally ambitious investment in substations, long lines and system controls.
Conclusion
POWERGRID’s Barmer-II award is a decisive infrastructure step for evacuating 6 GW of Rajasthan solar power. The project combines a long-distance +/- 800 kV HVDC link, major converter terminals, 400 kV connections and synchronous condensers within a competitive BOOT framework. Its impact will be measured by timely construction and sustained availability, not by the award alone. If generation and transmission schedules remain aligned, the corridor can reduce network bottlenecks, strengthen the Barmer solar zone and move large volumes of clean electricity from western Rajasthan to the broader Indian grid.
References
POWERGRID – Investor meetings and notices
POWERGRID’s official filing repository is the primary company source for material project awards and TBCB disclosures, including successful-bidder announcements. Direct page link
RECPDCL – Transmission tender portal
The official bid-process coordinator portal hosts transmission RFPs, qualification information and results for competitively bid inter-state projects. Direct page link
Business Standard – Barmer-II project configuration
This project update records the Letter of Intent date, annual transmission charges, 6,000 MW HVDC terminals, approximately 1,000 km route and synchronous condensers. Direct page link
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