MMC子模块母排的电动力计算与试验研究  

Research on Electrodynamic Force Calculation and Test of Sub-module Busbar of MMC

作　　者：欧阳有鹏[1] 谢晔源[1] 姚宏洋 高彪[1] OUYANG You-peng;XIE Ye-yuan;YAO Hong-yang;GAO Biao(NR Electric Co.,Ltd.,Nanjing 211102,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《电力电子技术》2022年第2期115-118,共4页Power Electronics

基　　金：国家电网公司总部科技项目(5200-201956058A-0-0-00)。

摘　　要：当子模块内部发生直通短路故障时,母排上将流过短路电流,从而在母排上产生极大的电动力,可能造,成母排永久失效。在此以半桥子模块(HBSM)为例,首先,详细分析了母排在3种直通短路故障下的电流通路。其次,建立了子模块母排的有限元仿真模型,求解了各部分母排在故障工况下的电磁分布与电动力水平。最后,为了验证母排在故障下的耐受能力,设计了相应的试验电路,以最恶劣工况为例,试验结果表明,所设计的子模块母排结构安全可靠。When a straight-through short-circuit fault occurs inside a sub-module,the busbar will flow through the short-circuit current which may cause great electrodynamic force on busbar,which may result in permanent failure.The half bridge sub-module is taken as an example.Firstly,the current paths of the busbar under three kinds of straight-through short-circuit faults are analyzed in detail.Secondly,the finite element simulation model of the submodule busbar is established,and the electromagnetic distribution and the electrodynamic force of each part of busbar under fault condition is solved.Finally,in order to verify the tolerance of the busbar under the fault condition,the test circuit is designed.Taking the worst condition as an example,the test results show that the structure of the busbar of sub-module designed is safe and reliable.

关 键 词：模块化多电平换流器 直通短路故障 子模块母排 

分 类 号：TM46[电气工程—电器]