Siemens and Sumitomo Electric win order for HVDC link and agree on cooperation

    Leading experts in latest HVDC converter and cable technology join forces
    India's first HVDC link featuring state-of-the-art VSC technology
    Transmission link to support Government's Vision of 24x7 power for all


A consortium between Siemens and Sumitomo Electric Industries Ltd. has been awarded an HVDC order from Indian transmission operator Power Grid Corporation of India (POWERGRID) to supply a high-voltage direct current (HVDC) transmission system. The about 200 km long HVDC connection will be India's first DC link featuring voltage-sourced converter (VSC) technology. VSC is the latest innovation in HVDC technology offering a very stable and highly flexible reactive power control independent of active power control and additional features to support the AC systems like blackstart capability. Furthermore, this solution is ideal to be combined with XLPE cable technology. Siemens will be supplying two converter stations with two parallel converters, each rated 1000 Megawatts (MW), featuring its VSC HVDC technology while Sumitomo Electric will be responsible for the XLPE HVDC cable system in the DC circuit. The combined order volume for Siemens and Sumitomo Electric is approximately $520 million. The grid connection is scheduled to go into operation in the first half of 2020.

"We are proud to announce that this project will be the first HVDC link in India featuring VSC technology", states Ralf Christian, CEO at Siemens Energy Management. "Latest innovations will help achieving ambitious grid programs, like the "24 x 7 Power for all" initiative of India's Ministry of Power, to meet the growing power demand."

The Pugalur-Trichur ±320 kilovolt (kV) HVDC system will connect Pugalur in the southern state of Tamil Nadu to Trichur in Kerala State in South-West India. The Trichur converter station will be connected via underground XLPE HVDC cable to a transition station also being built by Siemens. Sumitomo Electric's DC-XLPE cable has unique characteristics among industries to maximize utilization of HVDC system, enabling normal operation temperature at 90 degree, which is suitable for the hybrid system with bulk power overhead line. Sumitomo Electric will supply a 128 km XLPE HVDC cable system comprising four cables for a route of 32 km each. From the converter station at Pugalur power will be transmitted via an overhead line to the transition station. The Siemens scope of supply for the turnkey project encompasses design, engineering, supply, installation as well as commissioning and major equipment supplies of the complete HVDC stations, including converter valves, transformers, cooling systems and control and protection technology

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