1.湖南大学电气与信息工程学院，湖南省长沙市 410082;2.湖南山立水电设备制造有限公司，湖南省邵阳市 422700
1.College of Electrical and Information Engineering, Hunan University, Changsha 410082, China;2.Hunan Sunny Hydropower Equipment Corporation, Shaoyang 422700, China
Existing hydropower station mostly adopt the constant-speed generation system, which will not only cause a decrease in periodic hydro-energy capture efficiency but also deteriorate the unit operation environment. The variable-speed operation (VSO) of the hydraulic turbine is the key to overcome the above-mentioned drawbacks. This paper reviews the application and development of the variable-speed constant-frequency (VSCF) technology in the hydropower generation field. Firstly, the common types of hydropower stations and the principles of constant-speed generation system are described, and the advantages and disadvantages of VSO systems are induced. Then, the main realization methods and operating principles of the VSCF technology are introduced, the characteristics and differences of each VSO system are compared, and the applicability and prospect of each system are analyzed. Finally, the emphases and difficulties of VSCF hydropower generation technologies are analyzed, and the future development directions are prospected.
DAI Litao, GAO Jian, HUANG Shoudao, et al. Variable-speed Constant-frequency Hydropower Generation Technology and Its Development[J/OL]. Automation of Electric Power Systems, http://doi. org/10.7500/AEPS20191118001.