双馈风力发电机低压穿越工况下的电磁场分析

Analysis of Electromagnetic Field under Low Voltage Ride Through of DFIG

随着双馈风力发电机大量的应用,风电机组的低压穿越情形越来越频繁,低压穿越工况对风力发电机早期故障的影响越来越引起人们的注意,人们迫切需要知道在低压穿越过程中电机内部的电磁场的变化情况。利用Matlab软件建立双馈风力发电机低压穿越模型,仿真得到整个低压穿越过程中电机内部的电流值,并将得到的电流值加载到由ANSYS软件建立双馈风力发电机模型中,利用ANSYS软件对整个低电压穿越过程中双馈风力发电机内部的电磁场进行仿真。

With the widely application of doubly -fed wind power generators , the low voltage ride through of wind power gener-ator system is becoming more and more frequent , and the influence of low voltage ride through condition on incipient fault of wind power generator has attracted much attention .It is urgent to know the changes of electromagnetic field inside the motor during low voltage ride through .The low voltage ride through model of doubly -fed wind power generator is established by Maltab software , and the current value inside the motor is obtained by the simulation during low voltage ride through .The ob-tained current value is loaded into the model of doubly -fed wind power generator established by ANSYS software , and the simulation of electromagnetic field inside doubly -fed induction generator in the whole process of low voltage ride is carried out with ANSYS software .