State Grid Hubei Electric Power Company Limited Economic Research Institute, Wuhan, China.
School of Electrical Engineering and Automation, Wuhan University, Wuhan, China.
PLoS One. 2019 Aug 27;14(8):e0221410. doi: 10.1371/journal.pone.0221410. eCollection 2019.
According to the coordination control of a dynamic voltage restorer (DVR) and an inductive fault current limiter (FCL), this paper proposes an efficient low-voltage ride-through (LVRT) scheme for a doubly fed induction generator (DFIG) based wind turbine. The DVR is located to the DFIG's stator circuit for stabilizing the terminal voltage and decreasing the generator current. The inductive FCL is connected to the DFIG's rotor circuit for suppressing the rotor overcurrent and protecting the converter. Theoretical discussions on structure, principle and scale criterion of the combined DVR-FCL are conducted, and simulation analyses of the proposed approach to handle symmetrical and asymmetrical faults are done in MATLAB/Simulink. In this study, the dynamic characteristics of the DFIG during the faults are analyzed from multiple aspects, and a detailed comparison of the proposed approach and the single action of DVR or FCL is carried out. From the simulation results, the effectiveness and superiority of the proposed approach are well demonstrated.
针对动态电压恢复器（DVR）和感应故障限流器（FCL）的协调控制，本文提出了一种基于双馈感应发电机（DFIG）的风力涡轮机的高效低电压穿越（LVRT）方案。DVR 位于 DFIG 的定子电路中，用于稳定端电压并降低发电机电流。感应式 FCL 连接到 DFIG 的转子电路，用于抑制转子过电流并保护变流器。本文对组合式 DVR-FCL 的结构、原理和规模准则进行了理论探讨，并在 MATLAB/Simulink 中对所提出的处理对称和不对称故障的方法进行了仿真分析。在本研究中，从多个方面分析了 DFIG 在故障期间的动态特性，并对所提出的方法与 DVR 或 FCL 的单一作用进行了详细比较。从仿真结果可以看出，所提出的方法具有很好的有效性和优越性。
