World's Tallest Steel-Concrete Tower Wind Turbine Connected to Grid in Xinji, Hebei

en.Wedoany.com Reported - On September 30, China Huadian Corporation announced that the world's tallest steel-concrete tower wind turbine had completed grid connection and begun generating electricity in Xinji, Hebei. The hub center height of the turbine reaches 204 meters, and it is part of the Phase III project of the 500 MW wind power project of Hebei Huadian Xinji. The Phase III project has an installed capacity of 100 MW and comprises 16 wind turbines, 15 of which adopt a 160-meter hub height scheme.

The grid-connected turbine has a single-unit capacity of 6.25 MW, a rotor diameter of 221 meters, and a single blade weight of 34 tons. The tower adopts a composite structure of "concrete lower section and steel upper section," with a concrete tower barrel at the lower part and a steel tower barrel at the upper part. Ultra-high-performance concrete is used at key positions, with material strength reaching 3 to 4 times that of ordinary concrete, and prestressed steel strand strength reaching 2,200 MPa. Key equipment including the main unit, blades, and tower barrel has all been localized.

The turbine adopts a coupled design of the complete machine and the steel-concrete tower. During the design phase, coordinated matching was carried out for the complete machine loads, tower stiffness, and vibration characteristics, and vibration monitoring devices were arranged at key positions on the tower. The tower adopts an assembled construction method, with prefabricated components installed in sections and then assembled on site.

Xinji is located in a plain low-wind-speed area. According to project estimates, compared with the 160-meter steel-concrete tower turbines in the same wind farm, this turbine can increase annual power generation hours by more than 220 hours and annual power generation by more than 6%, and can lower the development threshold for low-wind-speed wind power resources to within 4.5 m/s.