Recently, the China Three Gorges Group Jiangsu Rudong 800 MW (H6, H10) offshore wind power project, my country's first and Asia's first offshore wind power project using flexible DC transmission technology, has produced more than 5 billion kilowatt-hours of clean electricity, equivalent to It reduced standard coal consumption by approximately 1.5 million tons and carbon dioxide emissions by approximately 3.75 million tons.

Flexible DC transmission technology is currently the most cutting-edge power transmission technology in the world. It is especially suitable for long-distance cross-ocean cable power transmission, renewable energy grid connection, distributed power generation grid connection, island power supply (black start), asynchronous AC grid interconnection, etc. field. If current is compared to water flow, then flexible DC technology is equivalent to a precise "retention dam" that can accurately control the direction, speed and flow of water flow, making the reservoir water level more stable. In addition, flexible DC transmission technology can also convert electrical energy in the open sea into DC power with lower losses, which has better economic advantages than traditional power transmission methods.

The Three Gorges Rudong Project has built Asia's first offshore converter station, with a total weight of 22,000 tons. It was installed using the floatover method. This is also the first offshore converter station installed using the floatover method in China. The DC submarine cable of the project uses a voltage level of ±400 kV, and the length of the submarine cable reaches 99 kilometers, making it the longest flexible DC transmission cable in China. The collective application of multiple projects for the first time provides a key solution for the large-scale development of offshore wind power in deep seas.Editor/Zhao E