高压直流输电模块化多电平换流器拓扑研究  

Study of MMC topologies in HVDC system

作　　者：蔡洁[1] 夏向阳[1] 李明德 邱欣[1] 肖辉[1] 汤赐[1] CAI Jie;XIA Xiang-yang;LI Ming-de;QIU Xin;XIAO Hui;TANG Ci(School of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410004,China;Hengyang Products Quality Supervision Inspection and Institute,Hengyang 412001,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410004 [2]衡阳市产商品质量监督检验所,湖南衡阳421001

出　　处：《电力科学与技术学报》2018年第1期54-59,共6页Journal of Electric Power Science And Technology

基　　金：湖南省研究生科研创新项目(CX2016B405)

摘　　要：基于VSC(Voltage Source Converter)的高压直流输电为解决大规模清洁能源并网等问题提供了新方法,现已投运的VSC-HVDC工程无法有效处理直流故障。阐述传统H-MMC拓扑无法快速有效阻断直流侧故障电流的原因,重点对比分析目前已提出的3类具备直流侧故障切除的改进型换流器拓扑结构的共性与不同点,研究其清除直流侧故障的机理。通过PSCAD/EMTDC软件对不同拓扑组成的换流器进行仿真分析,验证了提出的换流器阻断直流侧故障电流的机理,改进型拓扑组成的换流器具有较好的应用前景。The high voltage DC transmission based on voltage source converter provides a new way to solve the problem of large scale clean energy integration.The VSC-HVDC project,which has been put into operation,cannot effectively deal with the DC fault.And the reason,that traditional H-MMC topology cannot quickly and effectively blocking the fault current on the DC side,was described in this paper.Then,the commonalities and differences of the three typical improved topologies were analyzed and the mechanism of removing DC fault was studied.Finally,the simulation of different converter was carried out by PSCAD/EMTDC software,and the mechanism of blocking DC side fault current was verified.The converter composed by improved topology has good application prospect.

关 键 词：高压直流输电 直流侧故障 模块化多电平换流器 电压源换流器 

分 类 号：TM71[电气工程—电力系统及自动化]