桥式限流与动态电压恢复器融合设计及控制方法  

Fusion Design and Control Method of Bridge Current Limiter and Dynamic Voltage Restorer

作　　者：涂春鸣[1] 李庆 郭祺[1] 姜飞[2] 高家元 Tu Chunming;Li Qing;Guo Qi;Jiang Fei;Gao Jiayuan(National Electric Power Conversion Control Engineering Technology Research Center Hunan University,Changsha 410082 China;School of Electrical and Information Engineering Changsha University of Science&Technology,Changsha 410004 China)

机构地区：[1]国家电能变换与控制工程技术研究中心(湖南大学),长沙410082 [2]长沙理工大学电气与信息工程学院,长沙410004

出　　处：《电工技术学报》2020年第20期4384-4396,共13页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金青年基金项目(51707014);湖南省教育厅资助科研项目(17C0040);可再生能源电力技术湖南省重点实验室基金项目(2017ZNDL005)资助。

摘　　要：针对传统故障限流器利用率低、动态电压恢复器易受到短路电流冲击的问题,该文提出一种桥式限流与动态电压恢复器融合设计拓扑结构,简称多功能型动态电压恢复器(MF-DVR)。通过复用直流侧泻放支路为限流支路,配合串联逆变器的控制,可有效地限制短路电流的大小并保护系统设备安全。该拓扑具有两种工作模式:当电网电压发生暂升暂降时,工作于电压补偿模式,类似于传统动态电压恢复器;当负载侧发生短路故障时,工作于短路限流模式,类似于传统固态限流器。该文详细分析其拓扑结构、工作原理以及控制策略;通过Simulink仿真和RT-LAB硬件在环实验验证了所提拓扑及控制方法的正确性以及电压补偿、短路限流功能的有效性。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.

关 键 词：电压跌落 短路故障 动态电压恢复器 固态限流器 模式切换 功能复用 

分 类 号：TM464[电气工程—电器]