一种具备故障自清除能力的MMC新型双子模块拓扑研究  

Research on MMC Novel Dual Sub⁃module Topology with Fault Self⁃clearance Capability

作　　者：孙银山 杨晓平 任军辉 SUN Yinshan;YANG Xiaoping;REN Junhui(Xi’an XD Power System Co.,Ltd.,Xi’an 710065,China)

机构地区：[1]西安西电电力系统有限公司,西安710065

出　　处：《高压电器》2021年第8期115-119,共5页High Voltage Apparatus

基　　金：国家重点基础研究发展计划项目(2015CB251000)。

摘　　要：在多端柔性直流电网中,直流故障快速隔离和清除能力是系统可靠安全运行的保障。直流故障清除能力是制约基于半桥模块MMC发展的关键问题。文中提出了一种新型二极管箝位双子模块拓扑结构,在两个单子模块串联的基础上,增加了一个IGBT和一个二极管,利用子模块电容电压迫使导通的二极管反向截止,从而有效抑制MMC的不控整流效应,快速切断故障电流通路,具备直流故障自消除能力,具有很好的经济性和应用价值。In the multi terminal flexible DC power grid,the rapid isolation and clearance of DC fault is the guarantee of the reliable and safe operation of the system.The scavenging capability of DC fault is the key problem that restricts the development of half bridge module MMC.This paper presents a new type of diode clamp double module topology,which adds a IGBT and a diode based on two series list module,and can force diode reverse cut⁃off.The new double module topology can effectively inhibit MMC rectifier effect and quickly cut off the fault current path with DC fault self⁃clearance capability,which has good economic and application value.

关 键 词：直流短路故障 故障穿越 模块化多电平换流器 二极管箝位双子模块 基于电压源换流器的高压直流输电 

分 类 号：TM721.1[电气工程—电力系统及自动化]