Siemens Sumitomo JV Commissions VSC HVDC Link in India
The joint venture of Siemens Energy and Sumitomo Electric has completed connecting India’s first high voltage direct current link featuring voltage-sourced converter and DC-XLPE cable technology. The 2,000 megawatts 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 State in South-West India and supports transmission operator Power Grid Corporation of India 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.
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, while Sumitomo Electric provides 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. The converter stations are linked via a 108km XLPE HVDC cable system comprising four cables a route of 27 km each which was supplied by Sumitomo Electric, and overhead transmission line a route of approximately 155 km installed under another contract.