Fusion Design and Control Method of Bridge Current Limiter and Dynamic Voltage Restorer
Tu Chunming1, Li Qing1, Guo Qi1, Jiang Fei2, Gao Jiayuan1
1. National Electric Power Conversion Control Engineering Technology Research Center Hunan University Changsha 410082 China; 2. School of Electrical and Information Engineering Changsha University of Science & Technology Changsha 410004 China
Abstract：The traditional fault current limiter has a low utilization rate, and the dynamic voltage restorer is vulnerable to short-circuit current. Therefore, a topology combined with the bridge-type current limiting and dynamic voltage restorer fusion design is proposed, referred to as a multifunctional dynamic voltage restorer (MF-DVR). By multiplexing the DC side discharge branch as a current limiting branch and with the control of the series inverter, the short-circuit current can be effectively limited and the system equipment safety can be protected. The topology has two modes of operation: when the grid voltage temporarily rises and sags, it works in voltage compensation mode, similar to the traditional dynamic voltage restorer; when a short-circuit fault occurs on the load side, it works in short-circuit current limiting mode, similar to the traditional solid-state fault current limiter. The topology, working principle and control strategy are analyzed in detail. The proposed topology and control method, as well as the effectiveness of voltage compensation and short-circuit current limiting function, are verified by simulations of Simulink and experiments of RT-LAB hardware in the loop.
涂春鸣, 李庆, 郭祺, 姜飞, 高家元. 桥式限流与动态电压恢复器融合设计及控制方法[J]. 电工技术学报, 2020, 35(20): 4384-4396.
Tu Chunming, Li Qing, Guo Qi, Jiang Fei, Gao Jiayuan. Fusion Design and Control Method of Bridge Current Limiter and Dynamic Voltage Restorer. Transactions of China Electrotechnical Society, 2020, 35(20): 4384-4396.
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