DNV GL has helped the Electric Power Research Institute (SEPRI) in successful commissioning of world's first three-terminal voltage-source converters (VSC) high voltage direct current (HVDC) transmission system in China.

Supported by the Chinese National Science & Technology Ministry, the pilot project with designed ratings of ±160kV/200MW-100MW-50MW is designed to bring dispersed, intermittent clean wind power generated on Nanao island into the mainland Guangdong power grid through 32km of combination of HVDC land cables, sea cables and overheard lines.

DNV GL has provided in-depth technical expertise and consulted on the feasibility of the project, enabling the VSC HVDC system to move into stable operation.

SEPRI pilot project technical leader Dr. Xu Shukai said the multi-terminal VSC HVDC transmission project laid foundation for wider applications of the technology in collection of multi clean energy sources from different geographical locations and their distribution to multi load centers at different geographical locations.

DNV GL energy business principal consultant Dr Yanny Fu said, ”SEPRI has demonstrated great leadership and pioneering work with its multi-terminal VSC HVDC transmission technology and is helping to build a promising, sustainable, cleaner energy future.”

The project involved multiple local suppliers, including three VSC HVDC valve suppliers, two HVDC land/sea cable suppliers and three control & protection system/equipment suppliers.