The joint venture of Siemens Energy and Sumitomo Electric has completed connecting India’s first high-voltage direct current (HVDC) link featuring voltage-sourced converter (VSC) and DC-XLPE cable technology. The 2,000 megawatts (MW) electricity transmission system consists of two converter stations that are connected via two links comprising DC-XLPE cable and overhead transmission line. It enables the power exchange between Pugalur, in the southern state of Tamil Nadu, and Trichur, in Kerala in Southwest India, and supports transmission operator Power Grid Corporation of India (PGCIL) to counter power deficit in India’s southern region and improve the grid stability.
Siemens Energy supplied the two converter stations for the ±320 kilovolt (kV) HVDC system, while Sumitomo Electric was responsible for the XLPE HVDC cable system in the DC circuit. The result of this fruitful collaboration will significantly help achieving grid programs like the “24x7 power for all” initiative by India’s Ministry of Power to meet the country’s growing power demand.
Siemens Energy is responsible for design, engineering, supply, installation, and commissioning of the HVDC stations, including converter valves, transformers, cooling systems as well as control and protection technology, plus a complete transition station, and Sumitomo Electric is providing design, engineering, supply and installation of the HVDC cable system, including civil and installation works.
In comparison to conventional HVDC systems, the VSC-based HVDC PLUS technology featured at the Pugalur-Trichur link comes with benefits, like additional control features, black start capability, and other functions that will improve the performance and security of the transmission system.
In India, where 175 gigawatts of renewable energy-based installed capacity by 2022 is targeted, the HVDC link between Pugalur and Trichur will help meet future requirements and facilitate the efficient use of renewable energy.
To date, Siemens Energy has implemented more than 57 HVDC projects worldwide and is involved in 11 projects that are currently under construction. Sumitomo Electric has installed 9 HVDC cable projects worldwide and has two ongoing projects.