Voith Siemens Hydro, a global leader in hydropower equipment manufacturing, recently announced that the first runner for the Longtan Hydropower Station's Phase I project has been successfully completed on-site. The project, which is the second-largest hydropower station in China after the Three Gorges Dam, has now passed the preliminary inspection by Longtan Hydropower Development Co., Ltd. and is set to begin installation and commissioning.
The project, located in the upper reaches of the Hongshui River in Guangxi, boasts a total installed capacity of 6.3 million kilowatts. It will feature nine mixed-flow turbine generator units, each with a capacity of 700,000 kW. Construction began in July 2001, with the river diversion completed in November 2003. The first unit was expected to start operating in July 2007, and by December 31, 2009, all seven units were fully operational.
Longtan Power Station is composed of three key components: the dam, an underground powerhouse, and a navigation building. Its construction has set new world records, including the highest Roller Compacted Concrete (RCC) dam at 216.5 meters tall, with a total concrete volume of 7.41 million cubic meters. The underground powerhouse is the largest ever built, measuring 388.5 meters long, 28.5 meters wide, and 74.4 meters high. Additionally, it features the highest ship lift system in the world, capable of lifting vessels up to 179 meters in two stages.
In January 2003, Shanghai Voith Siemens Hydropower Equipment Co., Ltd., in collaboration with Dongfang Electric Machinery Co., Ltd., secured the contract to supply turbines for the first phase of the Longtan project. Voith Siemens took charge of the hydraulic design and overall engineering of the turbine system, while also manufacturing and supplying critical components such as five turbine runners, four turbine seat rings, four water guide mechanisms, and six spindles. They also provided sealing and automation equipment for three units.
Industry experts consider the Longtan project a testament to Shanghai Voith Siemens’ advanced hydropower technology. As the core component of a hydroelectric generator, the turbine runner is crucial, and its on-site production marked a significant innovation and challenge for the global hydropower industry. With over 140 years of experience in hydropower equipment manufacturing, especially in large-scale projects, Voith Siemens has proven its expertise. The company previously collaborated with GE Hydro to supply six 700,000 kW generating units for the Three Gorges Dam and has also secured contracts for other major Chinese hydropower projects, such as the Xiaowan and Laxiwa stations.
China is rich in hydropower resources, with the largest reserves and potential for development globally. The country has made remarkable progress in harnessing this clean energy source, and projects like Longtan are setting new benchmarks in engineering and sustainability.
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