Crowbar电路对双馈风力发电机暂态过程的影响分析

The Influence of Crowbar Circuit on Transient Process of Doubly Fed Wind Generator

本文以Crowbar电路在双馈异步感应发电机组并网故障时对系统暂态的影响为研究对象,利用MATLAB/Simulink仿真平台建立了风电并网系统模型,分析了Crowbar电路参数和切除时间对双馈风力发电机低电压穿越暂态过程的影响。仿真结果表明,选择合适的Crowbar电路参数和故障后该电路的切除时间,能有效地减小暂态过程的直流分量,提高网侧稳定性和风机系统低电压穿越能力。

This paper aimed to research the influence of Crowbar circuit to the transient process of power system when double fed induction generator(DFIG)unsuccessfully connected to the power system.Based on the software of MATLAB/Simulink,a wind power grid model connected to the power system was established and the influence of Crowbar circuit resistance and removal time to the ability of low voltage ride through of wind grid was analyzed.The simulation results indicated that proper parameters and removal time of the Crowbar circuit could effectively reduce the DC component in the transient process and improve the stability of the wind grid and the ability of low voltage ride through of the wind grid.