一种具有故障处理能力的电容箝位子模块拓扑分析  

Analysis of a novel capacitance-clamped MMC with dc fault current limiting capability

作　　者：汪乾韬 王果[1,2] 武琼 姜兴宇 WANG Qiantao;WANG Guo;WU Qiong;JIANG Xingyu(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Rail Transit Electrical Automation Engineering Laboratory of Gansu Province,Lanzhou 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070 [2]甘肃省轨道交通电气自动化工程实验室,甘肃兰州730070

出　　处：《铁道科学与工程学报》2019年第6期1560-1568,共9页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51367013,51867012);甘肃省科技计划资助项目(17JR5RA083);兰州交通大学优秀科研团队资助项目(201701)

摘　　要：通过介绍T型子模块、电容箝位子模块和二极管箝位子模块拓扑,提出一种基于T型子模块的改进电容箝位子模块拓扑。分析系统在故障时子模块各器件的电参数变化,从理论上确定其器件耐压特性和故障阻断能力。在MATLAB/Simulink平台上建立基于MMC的整流电路进行仿真,并与二极管箝位子模块和T型子模块进行了比较。研究结果表明:该子模块具有较强的故障处理能力。Therefore,an improved T-submodule was proposed on the basis of related types of MMC sub-module topology which have the ability of clearing DC fault current in this paper.By analyzing the change of various parameters of the sub-modules during the period of system malfunctioning,the device's withstand voltage characteristics and fault blocking capability were theoretically analyzed.To verify the blocking function of new sub-module and compare with DCSM and TMSM,an MMC-based rectifier circuit which consist of new submodule was built on the platform of MATLAB/Simulink for simulation,which shows that the new submodule has well performance.

关 键 词：模块化多电平 子模块 电容箝位 闭锁阻断 

分 类 号：TM46[电气工程—电器]