World's First 35-KV Low-Frequency Submarine Cable Deployed

The world's first 35-kilovolt low-frequency submarine cable was laid at Dachen Island, Taizhou, East China's Zhejiang Province, between May 6 and 9, laying a solid foundation for advancement of the Taizhou flexible low-frequency power transmission project in June.

The submarine cable was designed by China Energy Engineering Group Zhejiang Electric Power Design Institute Co., Ltd., a subsidiary of China Energy Engineering Corporation Limited (ENERGY CHINA).

Cable-laying near the Dachen Island in Taizhou, Zhejiang Province [Photo/sasac.gov.cn]

The Taizhou flexible low-frequency power transmission project includes construction of a 35-kV frequency switching station, the low-frequency power distribution equipment of the 35-kV Dachen substation, the 35-kV submarine cables and supporting lines from Dachen substation to Yanchang frequency switching station.

The Taizhou flexible low-frequency power transmission project adopts low-frequency interconnection technology for an island for the first time and combines low-frequency access technology for wind turbines.

Once operational, the project is expected to efficiently supplement the mainland-side grid and that of Dachen Island, promote effective charging and reduce energy loss during transmission through the submarine cable.

The project will also promote zero-carbon development on Dachen Island.

(Executive editor: Wang Ruoting)