Advanced Technologies, Expert Implementation 

STATCOM | VSC HVDC | MV DRIVES | BESS

RXPE Circuit

In September 2019 Rongxin Huiko Electric (RXHK) won an order to supply 1 set of ±400kV 1,100MW VSC HVDC converter valves for China Three Gorges’ (CTG)/CGN Rudong Offshore Wind Farm demonstration project. The scope of supply included the valve, including all insulators and AC-DC hardware fittings, together with the valve cooling and auxiliary system, valve control system, access platform for maintenance, spare parts and special tools, for installation at the onshore converter station.

 Manufacturing of the valve took place in Q3 and Q4 of 2020.

Rudong Map.jpg

The CTG New Energy Corporation’s Rudong offshore wind farm HVDC demonstration project is located in the southeast of Jiangsu Province on the northern edge of the Yangtze River Delta. The project, with a total installed capacity of 1,100MW, is comprised of three wind farms, of which the owners are China General Nuclear Power Corporation (CGN) Nantong Limited and CTG New Energy Corporation Nantong and Rudong Limited. 

The electric power generated by the three offshore wind farms is transmitted to three separate offshore AC substations via 35kV marine cable and transformed to 220kV before it is further transmitted to the offshore converter station. The electric power is converted to DC and then transmitted to an onshore converter station via a single, two core ~100km ±400kV marine cable. After being converted to 500kV AC in the onshore converter station, the electric power finally flows into the China State Grid Jiangsu power network. 

This project is regarded as “Three Gorges in the Sea” for its 106km coast line and 6,000 square kilometers ocean resources. After putting the HVDC link into service in December 2021 the wind farm has become the largest offshore in Asia. It is also the first operational offshore wind power HVDC transmission project outside of Europe.

Rudong Valve Hall 2.jpeg