Abstract：This paper firstly analyses the electromagnetic transient process respective compo- nents change law of doubly-fed induction generator(DFIG) under the grid voltage dip. Through solving differential equations in time-domain, the results that the stator and rotor currents include not only the components of itself but also DC components and AC components of speed frequency are obtained, and simulation spectrum analysis is carried out. The conclusion is consistent between simulation spectrum analysis and theoretical analysis. It expounds the root cause of overvoltage and overcurrent in rotor side. And then, the DFIG low voltage ride-through(LVRT) control strategy based on considering electromagnetic transient process is proposed, improving traditional vector control algorithm. The simulation contrastive analysis shows that the improved control strategy can restrain the rotor current impact effectively, and increase the uninterrupted operation ability of DFIG under grid voltage dip.
王勇, 张纯江, 柴秀慧, 高俊娥, 杜翠. 电网电压跌落情况下双馈风力发电机电磁过渡过程及控制策略[J]. 电工技术学报, 2011, 26(12): 14-19.
Wang Yong, Zhang Chunjiang, Chai Xiuhui, Gao Jun’e, Du Cui. Electromagnetic Transient Process and Control Strategy for Doubly-Fed Wind Power Generator Under Grid Voltage Dip. Transactions of China Electrotechnical Society, 2011, 26(12): 14-19.
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2011, Vol. 26 
