动态电压恢复装置的拓扑结构

A Survey on Topology of Dynamic Voltage Restorer

介绍了利用多种储能元件实现动态电压恢复装置(DVR)的原理、结构,分析了化学电池储能、超导储能以及飞轮储能的优缺点,并指出直接由并联支路从电网获取能量拓扑方式目前更适合于实际工程应用。在低电压等级中,对二极管整流拓扑、高频隔离型拓扑等几种直接由并联支路从电网获取能量的拓扑方式进行了比较分析,精减低压系统中指出高频隔离型拓扑的优点和应用价值。在中压系统中,对五电平二极管箝位、飞跨电容型箝位、级联多电平以及混合级联多电平进行了特点分析,指出了级联型拓扑在以后的实际应用中的实用价值。通过对比归纳总结动态电压恢复装置目前的各种拓扑结构,对动态电压恢复装置的实际工程应用具有一定的指导意义。

Firstly paper introduces the principle and structure of dynamic voltage restorers(DVR) with kinds of energy storage element, then analyzes advantages and disadvantages among the chemical battery, the superconducting magnetic and the flywheel, and points out that obtaining energy directly from the grid side is more suitable for the practical engineering application. Several topologies of low voltage DVR with obtaining energy from the grid side are compared and analyzed, including the three-phase diode rectifier topology and the high frequency isolation topology, etc. Paper points out that the high frequency isolation topology has tremendous potential in the future. In the medium-voltage system, the five level diode-clamped topology, the flying capacitor-clamped topology, the cascade topology and mixed cascaded topology are introduced, and points out that the cascaded topology is superior to others in the practical application. In this paper, by comparing topologies of DVR, paper gives a guidance to the practical application.