模块化多电平换流器的拓扑和工业应用综述

Review on Topology and Industry Applications of Modular Multilevel Converter

模块化多电平换流器(modular multilevel converter,MMC)在高压大功率系统领域已展现出极其重要的工程应用前景。首先介绍了典型MMC的电路拓扑和工作原理,然后分别从子模块级拓扑和系统级拓扑2个方面,系统回顾了MMC拓扑的国内外最近研究进展,总结了MMC在柔性直流输电、电力传动、高压直流功率变换、电能质量问题治理等工业领域的工程应用现状。在此基础上指出MMC今后亟待研究的关键问题。相关研究结果表明,MMC在电力系统中具有广泛的应用前景,是未来中高压大功率系统的重要发展方向之一。

Modular multilevel converter（MMC） has shown its significant project prospects in field of high-voltage high-power system. Introducing typical MMC topology and operation principles, this paper focused on sub-module-level and system-level respectively to summarize state-of-the-art progress of MMC topologies. Then its industry application status such as flexible DC power transmission, electric power drive, high-voltage DC power conversion, power quality conditioning, was reviewed in detail. Moreover, future key issues to be solved urgently were also pointed out. It shows that MMC has good application prospect in next-generation power system, especially for high-voltage high-power conversion system.