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Effect of Shifting the Pole-shoe and Damper-bar Centerlines on the No-load Voltage Waveform of a Tubular Hydro-generator

  • Fan, Zhen-nan (The Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua university) ;
  • Han, Li (State Key Laboratory of Power Transmission Equipment & System security and New Technology, Chongqing University) ;
  • Liao, Yong (State Key Laboratory of Power Transmission Equipment & System security and New Technology, Chongqing University) ;
  • Xie, Li-dan (State Key Laboratory of Power Transmission Equipment & System security and New Technology, Chongqing University) ;
  • Wen, Kun (The Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua university) ;
  • Wang, Jun (The Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua university) ;
  • Dong, Xiu-cheng (The Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua university) ;
  • Yao, Bing (The Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua university)
  • Received : 2017.10.07
  • Accepted : 2018.01.26
  • Published : 2018.05.01

Abstract

This study optimises the no-load voltage waveform of tubular hydro-generators by a simple design scheme. For different centerlines of the pole shoe and damper bar, the optimisation effects on the no-load voltage waveform are investigated in two tubular hydro-generators with different weighted powers (34 MW and 18 MW). The results are compared with those of the traditional stator-slots skewed design. The quality of the no-load voltage waveform was related to the shifting degree, and the different optimisation effects between the integer slot generator (q = 2) and the fractional slot generator (q = 11/2) were analysed. This research can improve the quality of the power output and no-load voltage waveform, and provide an effective reference for improving the industrial design and manufacture level of tubular hydro-generators.

Acknowledgement

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

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