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Fault Ride Through Capability Enhancement of Doubly Fed Wind Generator Using Hybrid Protection Circuits

机译:使用混合保护电路提高双馈风力发电机的故障穿越能力

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This paper presents a new FRT control strategy to improve the dynamic response of doubly fed induction generator based wind turbine (DFIG-WT) during grid fault. The proposed control scheme is based on hybrid protection circuits, which comprises an active crowbar circuit, a series dynamic resistance (SDR) circuit, and a DC-link Chopper circuit. A coordinated control strategy is been developed to enable the circuit. This strategy enables the crowbar to disable the rotor side converter (RSC), allowing the rotor overcurrent to path through SDR resistors, and the DC-Chopper is engaged to suppress the overvoltage in DC-Link. Simulation analysis by using MATLAB/Simulink shows that the proposed strategy enhanced FRT capabilities for DFIG in symmetrical voltage dip, protected the power converter, limited the rotor overcurrent, and suppressed the DC-link overvoltage.
机译:本文提出了一种新的FRT控制策略,以改善基于双馈感应发电机的风力发电机(DFIG-WT)在电网故障期间的动态响应。所提出的控制方案基于混合保护电路,该电路包括有源撬棍电路,串联动态电阻(SDR)电路和直流母线斩波器电路。开发了协调控制策略以启用电路。这种策略使撬棍能够禁用转子侧转换器(RSC),从而允许转子过电流流经SDR电阻器,并且直流斩波器被接合以抑制直流母线中的过电压。使用MATLAB / Simulink进行的仿真分析表明,所提出的策略增强了DFIG在对称电压骤降中的FRT功能,保护了功率转换器,限制了转子过电流并抑制了直流母线过电压。

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