【摘要】 根据当今世界对风能转换系统提出的必须具有低电压穿越能力的要求,研究了电网跌落对双馈风力发电机的影响。在电网跌落时双馈风力发电机运行特点的基础上,分析并提出了一种基于磁链追踪的双馈风力发电系统低电压穿越控制策略,有效地抑制了双馈风力发电机定、转子过电流,保证了变流器的安全运行,实现了双馈风力发电机在电网跌落时的低电压穿越。依据理论分析,建立了双馈风力发电机磁链追踪控制模型,并通过MATLAB/SIMULINK平台进行仿真研究,仿真结果证实了所提控制策略的可行性和有效性。更多还原

【Abstract】 According to the requirements proposed by the current world that the wind energy conversion systems must have the capability of low voltage ride through( LVRT),this paper studies the influences to the doubly fed induction generator( DFIG) under grid fault. Based on the DFIG operation characteristics during the grid fault,this paper proposes control strategy for LVRT of doubly fed wind power generation system based on flux tracking to restrain the over current of DFIG stator and rotor effectively,and ensure the safe operation of converter. In terms of theoretic analysis,the mode of flux tracking control strategy is constructed,and is simulated in the platform of MATLAB / SIMULINK.The simulation results demonstrate the feasibility and viability of the proposed control strategy.更多还原