Study and discussion on the problems of Shaft Voltage and Bearing Current in Wind Power Generation System
Industrial Electronics and Applications（2014）
Abstract
In the modern wind power generation system, because of the large number of the high frequency power electronic devices, it brings the bearing current problems to the entire system, affecting the safe operation of the system and the life of generator bearing and other mechanical parts seriously. Precise analysis of distributed capacitance parameter is very important to predict shaft voltage and bearing current accurately. The chapter analyses common mode model of whole wind power generation system firstly. With study of the inner structure of the Wind turbines, the analytic calculation formula of distributed capacitances in the Wind turbines is put forward. Finite element method is also recommended. Based on the above analysis, formation mechanism and influence on bearing current of wind power generation system is determined.
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Key words
finite element analysis,power electronics,wind power plants,wind turbines,bearing current problems,common mode model,distributed capacitance parameter analysis,finite element method,generator bearing,high frequency power electronic devices,mechanical parts,shaft voltage prediction,wind power generation system,bearing current,common-mode model,distributed capacitances,inverter,wind power generation,capacitance,couplings
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