基于CROWBAR的双馈感应风力发电机低电压穿越研究

Research on Low Voltage Ride Through of CROWBAR Based Double-fed Induction Wind Generator

以双馈感应风力发电机为研究对象,在机端电压出现大幅度跌落时,采用CROWBAR保护电路,并对CROWBAR保护电阻的阻值整定进行了详细的讨论。利用PSCAD软件,对于单机无穷大系统进行建模仿真,仿真结果表明本文提及的控制策略能有效的提高双馈感应风力发电机低电压穿越能力。

n this paper, CROWBAR protection circuit is adopted when the output voltage of the double-fed induction wind generator decreases rapidly. The setting method of the resistor of CROWBAR protection circuit is detailedly discussed. Modeling and simulation of a single-machine infinite system are carried out based on PSCAD. The simulation results show that, the control strategy proposed in this paper can highly improve the low voltage ride through capability of the double-fed induction wind generator.