On October 12, Dongfang Electric Corporation (DEC) successfully rolled out the world’s largest 26-megawatt offshore wind turbine at the Fujian Three Gorges Offshore Wind Power International Industrial Park in Fuqing city.
This turbine represents the largest single-unit capacity and the longest rotor diameter for a fully domestically produced offshore wind turbine. With a fully independent and controllable supply chain, the turbine comprises over 30,000 components, with critical technologies for key parts such as the generator, blades, bearings, and electrical control systems reaching world-leading levels.
It is the latest achievement in the rapid advancement of China’s wind power equipment industry and provides strong technological support for building a new power system and achieving China’s dual carbon goals.
The 26-megawatt offshore wind turbine rolls off the production line. [Photo/sasac.gov.cn]
The turbine has adopted third-generation fully integrated semi-direct-drive technology, with high integration of the shaft system, gearbox, and generator. This results in features such as pure torque transmission, high load capacity and high reliability. Last month, a turbine using this technology successfully passed the test of super typhoon Muifa.
The turbine features a fully sealed structure to prevent salt fog corrosion, giving it excellent corrosion resistance. It has also overcome the challenge of aerodynamic and structural coupling by using advanced three-level full-power variable frequency technology and an optimized drivetrain, improving overall power generation by more than 2 percent. At a wind speed of 10 m/s, the turbine can achieve over 4,000 operating hours per year.
The turbine’s hub height reaches 185 meters—equivalent to a 63-story building—and its swept area is roughly equal to 10.5 standard football fields. At an average wind speed of 10 m/s, a single turbine can generate 100 million kWh of clean energy annually, sufficient to meet the annual electricity needs of 55,000 households. This would save over 30,000 tons of standard coal and reduce carbon dioxide emissions by more than 80,000 tons.
DEC will continue to intensify efforts in technological innovation, aiming to secure a leading position in the future of the renewable energy equipment sector and contribute to China’s goal of becoming a global science and technology powerhouse, achieving high levels of technological self-reliance and strength.
(Executive editor: Zhu Zeya)
