Located in Pingtan,one of the world's three offshore areas, China General Nuclear Power Corporation (CGN)'s offshore wind power project in Dalian Island, Pingtan County undertaken by CCCC is the hardest-to-build offshore wind power project in China.The complicated geological structure, harsh hydrological conditions and strong wind all over the year made the project the most difficult to build of its kind in China, plus the project needed 60 wind turbines.

"The only belief we have is to make the windmill spin on this sea area!"

The project team set up an auxiliary platform with six auxiliary piles to do the positioning of monopile foundation driving. During the construction of auxiliary pile driving, it is necessary to cover the hydraulic vibrating hammer on the top of the pile and then drive the hammer, which is equivalent to "wearing" a hat on a 12-story steel pipe pile. In order to solve this technical difficulty, the project team, afterdiscussions and experiments, finalized a feasible plan - welding a guiding device on the fixture of the vibrating hammer. The device then helps reduce the probability of the vibrating hammer colliding with the pile wall, thereby reducing the difficulty of precision control of the vibrating hammer when lifting and lowering it, improving the efficiency of the hammer set, and shortening the construction time to one-tenth of the original.

The 240,000-kilowatt offshore wind power project in Dalian Island, Pingtan County was connected to the grid on December 29, 2021. It sent about 960 million kWh of electricity to the power grid annually, saving 308,100 tonnes of standard coal and reducing carbon dioxide emissions by 900,000 tonnes a year. The project will contribute to the development of offshore wind power in Fujian Province and to building a smart and clean energy demonstration base in Pingtan.