一种隔离型多端口直流-直流模块化多电平变换器  

Isolated Multi-port DC-DC Modular Multilevel Converter

作　　者：许颖飞 金林 王昆[1] 邓焰[1] XU Yingfei;JIN lin;WANG Kun;DENG Yan(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电工技术》2020年第15期29-32,36,共5页Electric Engineering

摘　　要：模块化多电平变换器(MMC)已广泛用于高压直流输电,能将单个低压直流电网连接到高压直流电网。当需要将两个或多个电压等级不同的直流电网连接到同一个高压直流电网时,传统的解决方案是使用多绕组变压器或多个变换器。基于此,提出了一种隔离型多端口直流-直流模块化多电平变换器,可同时连接3个直流电网。针对所提变换器,分析了其工作原理和控制方法,并通过试验验证了所提拓扑的可行性与理论分析的正确性。Modular multilevel converters(MMC)have been widely used in HVDC applications and it is able to connect a low-voltage DC grid to a high-voltage DC grid.However,when two or more DC grids with different voltage levels are required to connect to one high voltage DC grid,the traditional solution is to use a multi-winding transformer or multiple MMCs.In this paper,an isolated multi-port DC-DC modular multilevel converter was proposed,which could connect multiple DC terminals.The operation principles and the control methods were analyzed in the paper.The effectiveness and performance were also evaluated by experiment.

关 键 词：DC-DC变换器 直流电网 模块化多电平 多端口 

分 类 号：TM722[电气工程—电力系统及自动化]