IN Brief:
- PGCIL has selected GE Vernova for the 6GW Barmer II–South Kalamb HVDC corridor, booked in the fourth quarter of 2026.
- The ±800kV bipolar design comprises two 3GW poles and includes converter stations, major equipment and commissioning work.
- Line-commutated converter valves will be manufactured at GE Vernova’s Pallavaram plant, alongside its eLumina control platform.
GE Vernova has been selected by Power Grid Corporation of India Limited (PGCIL) to deliver a 6GW high-voltage direct current (HVDC) transmission corridor connecting Barmer II in Rajasthan with South Kalamb. The contract, announced on 6 November and booked in the fourth quarter of 2026, covers the design and delivery of a ±800kV bipolar link intended to move electricity from a renewable generation region towards a major demand area. GE Vernova’s announcement establishes a contract award for future infrastructure, not an operating 6GW transmission connection.
The planned system is described as a 6,000MW scheme configured as two 3,000MW poles. The ±800kV rating refers to the positive and negative pole voltages relative to earth in the bipolar arrangement, while the 6GW figure expresses the total designed power-transfer capability. It does not describe the amount of electricity already produced in Rajasthan, the capacity of a newly commissioned power station or a guaranteed continuous flow. Actual transfers once the scheme is operating will be limited by generation, demand, connected network conditions, converter availability and the operating requirements of the transmission system.
GE Vernova’s contract covers the overall HVDC design, converter stations, major equipment and management of site erection, testing and commissioning. Responsibility across those interfaces is central to a project at this voltage: converter valves, transformers, controls and their AC connections must work as a coordinated system. The order was booked in the fourth quarter of 2026, but the supplier has not given a commissioning date, route length or contract value. Delivering the converter stations and connecting them to the wider grid will therefore be the next substantive measures of progress.
The design uses line-commutated converter (LCC) technology. An LCC employs controlled semiconductor valves to convert between alternating current and direct current, with the voltage waveform of the connected AC system playing a central role in the switching process. LCC installations are established technology for bulk power transfer, particularly where the requirement is to transport very large quantities of electricity over long distances. Their operation, however, depends on suitable AC-system strength and coordinated control of reactive power and voltage. The precise equipment configuration is determined through the project’s electrical design rather than by the 6GW rating alone.
GE Vernova states that the valve equipment will be manufactured at its Pallavaram factory in India. Local production of a critical converter component links the contract to an existing industrial manufacturing facility, although the company has not published a quantity of valves, a manufacturing completion date or a detailed sourcing breakdown. The converter valves are only part of an HVDC terminal. Transformer systems, harmonic management, smoothing and protection arrangements, auxiliary power and cooling also need to be integrated according to the chosen design and the characteristics of the connected networks.
GE Vernova’s eLumina control platform is part of the proposed system. HVDC controls regulate converter operation, power-flow setpoints, voltage conditions and the interaction between the two terminal stations. Protection must detect and respond to faults while coordinating with the surrounding AC networks. In a line-commutated system, control performance is closely linked to AC voltage strength and the timing of the semiconductor valves. The final operating envelope will be established through electrical design, equipment integration and acceptance testing under PGCIL’s requirements.
The proposed corridor is intended to connect renewable-rich areas of western Rajasthan with load centres outside the generation region. High-voltage direct current transmission is suited to transferring large blocks of power between distant points, where it can provide controllable scheduled flows without all the operating characteristics of an equivalent AC link. That can help move energy from areas with substantial renewable resources towards consumers elsewhere in the system. The transmission corridor is nonetheless a network asset: the electricity available for export will depend on completed generation projects and the grid infrastructure connecting them to Barmer II.
A two-pole design divides the rated transfer between separate positive and negative DC poles, each identified as 3GW in the contract description. How the scheme responds to a fault or outage on one pole will depend on detailed arrangements for converter equipment, return paths and network protection. The bipolar designation alone does not guarantee that half the total power can be carried during every contingency. Reliability and fault management must therefore be established through engineering design and tests of the finished system.
PGCIL is responsible for major elements of India’s inter-state electricity transmission network, and the contract supports expansion needed to integrate generation situated far from demand. The operational challenge is both geographic and electrical: output from wind and solar installations varies over time, while transmission assets must be designed around their thermal, voltage and stability limits. High-capacity HVDC transfer can provide a controlled path between regions, but grid reinforcements at either end may still be needed to accommodate the resulting flows. The contract update does not identify all complementary works or network operating restrictions.
Philippe Piron, president and chief executive of GE Vernova’s Electrification segment, described the scheme as part of India’s grid expansion to accommodate large volumes of renewable power. Sandeep Zanzaria, chief executive and managing director of GE Vernova T&D India, also identified the link’s role in connecting Rajasthan’s generating region with demand centres. Their comments accompany a defined engineering award: two high-capacity converter terminals, a ±800kV LCC design, valves manufactured in Pallavaram, and the supplier’s integrated control system. Physical construction and commissioning are still to follow.
Factory production of the converter equipment will run alongside site construction and preparations for the AC network connections at Barmer II and South Kalamb. Installation must then be followed by insulation, protection and converter-control testing, coordinated energisation, and acceptance of the transmission system by PGCIL. The planned 6GW transfer capability will only become available once those stages are complete and connected grid conditions permit operation. The 6 November award establishes the scope and supplier for one of India’s largest planned HVDC corridors.
