风力发电机长输电缆过电压分析研究

Double fed wind turbine converter through long cable driving and analysis of over-voltage

在双馈风力发电机中,PWM变流器的输出脉冲经长输电缆励磁时产生过电压,严重时会导致风机转子和集电环的过早损坏。针对这一问题,此文分析了变流器长输电缆引起过电压的机理,提出了阻抗匹配和上升时间的相关抑制过电压方法,并据此在变流器输出侧和电机转子侧设计RLC电路,仿真结果证明了所设计电路能有效地抑制长输电缆引起的过电压。

In doubly fed wind power generator,the output pulse PWM converter through long-cable excitation over-voltage,will lead to serious fan rotor and premature ring damage.To solve this problem,this paper analyzes the converter over-voltage caused by long cable transmission mechanism,the imp edance matching and the rise time of the related Over-voltage Suppression Method,based on the output side and rotor side converter RLC circuit design,the simulation results prove that the designed circuit can effectively suppress the over-voltage caused by long cable transmission .