Study on Leading-phase Operation Capability of a 770 MW Jumbo Hydro-generator based on Stability Analysis and End-Region Heat Analysis

  • Fan, Zhen-nan ;
  • Zhou, Zhi-ting ;
  • Li, Jian-fu ;
  • Wen, Kun ;
  • Wang, Jun ;
  • Sun, Zhang ;
  • Wang, Tao ;
  • Yao, Bing
  • Received : 2017.10.06
  • Accepted : 2018.01.26
  • Published : 2018.05.01


A generator-grid coupling calculation model is established to study the leading-phase operational capability of a 770 MW jumbo hydro-generator in a Chinese ultra-mega hydropower station. The static and dynamic stability of the generator are analyzed and calculated to obtain stability limits under leading-phase operating conditions. Three-dimensional (3D) time-varying nonlinear moving electromagnetic and temperature field models of the generator end-region are also established and used to determine the magnetic field, loss, and temperature of the end-region under the leading-phase operating condition. The simulation results agree with data measured from the actual 770 MW hydro-generator. This paper provides reliable reference data for the leading-phase operation of a jumbo hydro-generator, which will help to improve in the design and manufacture of future hydro-generators.


770MW jumbo hydroelectric generator;Leading-phase operation capability;Power system stability;Electromagnetic analysis;Temperature


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Supported by : National natural sciences fund youth fund of China, Xihua University, Si chuan Provincial Education Department, Education Department of China