高电压技术2018，Vol.44Issue(2)：409-416,8.DOI:10.13336/j.1003-6520.hve.20180131010
适用于直流开断的IGCT串联均压技术
IGCT Series Voltage-sharing Technology for DC Breaking
摘要
Abstract
The series and parallel connection of power electronic devices is the main combination way of solving and realizing high voltage,high power direct current (DC) circuit breakers,and power electronic converters.We researched the static and dynamic voltage-sharing technology of the power electronic devices for high voltage DC breaking.Firstly,the causes of the uneven voltage-sharing of IGCT in series and the voltage-sharing technology of IGCT in series were analyzed to give the voltage-sharing scheme of IGCT in series for DC breaking.Then,the influence of the difference between the buffer capacitance,the buffer resistance and the turn-off trigger time on the voltage-sharing characteristic were analyzed.Finally,a power electronic valve was set up with four IGCTs in series for experimental verification.Research results indicate that,① the static voltage-sharing can adopt the static voltage-sharing resistance in parallel,and the dynamic voltage-sharing in load side can adopt the passive buffer method with buffer circuit in parallel;② the larger the buffer capacitance is,the smaller the buffer resistance is,then the smaller the over-voltage is,and the greater the time difference between the trigger signal is,the greater the degree of non voltage-sharing will be;③ the uneven Voltage-sharing coefficient of the breaking tests of 10.5 kV/1.5 kA is 5.71％,and the voltage-sharing is effective;④ Based on the modular power electronic series valve,the integrated experiments of the hybrid DC circuit breaker are completed,the short circuit current 3.6 kA and the over-voltage 21 kV are turned off within 3 ms.The feasibility of the voltage-sharing scheme of IGCT in series for high voltage DC breaking is verified by experiments,which provides the technical basis for the application of modular power electronic series valve in DC breaking.关键词
直流断路器/集成门极换流晶闸管/IGCT/串联阀组/静态均匀/动态均压Key words
DC circuit breaker/integrated gate commutated thyristors/IGCT/series valve/static voltage-sharing/dynamic voltage-sharing引用本文复制引用
屈鲁,张翔宇,陈政宇,余占清,曾嵘..适用于直流开断的IGCT串联均压技术[J].高电压技术,2018,44(2):409-416,8.基金项目
国家重点研究发展计划(2017YFB0903203) （2017YFB0903203）
第60批中国博士后科学基金.Project supported by National Key Research and Development Program of China (2017YFB0903203),the 60th China Postdoctoral Science Foundation. （2017YFB0903203）
