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Domestic power generation equipment achieves a major breakthrough in the power generation of the Three Gorges right bank unit
China has made significant progress in the production and installation of large hydropower units. On July 8 at 4:15 p.m., the No. 26 unit, the first domestically produced 700,000-kilowatt unit of the Three Gorges Project, manufactured by Harbin Electric Machinery Co., Ltd., successfully completed a 72-hour trial run. The test results showed stable operation, with normal temperatures, vibration levels, and flow rates across all components, meeting design specifications. This milestone marks an important step toward the localization of large hydropower technology.
Li Yongan, General Manager of China Three Gorges Corporation, emphasized at a commissioning coordination meeting that the successful completion of the 72-hour trial run was a major achievement in the localization of large-scale hydropower units. He called for continued collaboration among all parties to ensure the "first stable 100 days" goal is met.
Harbin Electric, through its independent R&D and technological innovation, has developed a series of high-performance hydropower units. The right bank power station of the Three Gorges Project features units designed and built with full intellectual property rights, showcasing significant advancements in turbine and hydro-generator technology. These innovations have elevated China’s hydropower manufacturing capabilities to new heights.
With over 50 years of experience, Harbin Electric has made remarkable achievements in the development of mixed-flow hydropower units. In the right bank power station, four 700,000 kW units with independent intellectual property rights were successfully developed, marking a major breakthrough in China's hydropower industry.
One key highlight was the elimination of long-standing issues with turbine pressure pulsation. The Three Gorges Left Bank turbines, which had a runner diameter over 10 meters, faced challenges due to complex operating conditions. Through continuous research and development, Harbin Electric overcame these difficulties, leading to the creation of a Francis turbine runner that performs exceptionally well under varying head conditions.
Another notable achievement was the introduction of air-cooling technology in the generator units. By shifting from water cooling to air cooling, Harbin Electric not only improved efficiency but also reduced maintenance costs and enhanced operational reliability. This innovation marked a global first in the design of such large-scale units.
In addition, Harbin Electric achieved world-class insulation technology for the main insulation system of the hydro-generators. Their advanced insulation solutions have been applied to large units with voltages up to 27 kV, meeting or exceeding international standards. These breakthroughs have laid a solid foundation for the domestication of large-scale hydropower units in China.
Overall, the success of the Three Gorges Project reflects China's growing strength in the field of hydropower engineering, driven by innovation, perseverance, and a commitment to excellence.