IGBT串联阀混合式高压直流断路器分断应力分析  

Analysis of the Turn-off Stress on Hybrid DC Circuit Breaker With IGBT Series Valve

作　　者：丁骁[1] 汤广福 韩民晓[1] 高冲 王高勇 DING Xiao;TANG Guangfu;HAN Minxiao;GAO Chong;WANG Gaoyong(School of Electric and Electronic Engineering, North China Electric Power University, Changping District, Beijing 102206, China;State Key Laboratory of Advanced Power Transmission Technology （Global Energy Interconnection Research Institute Co., Ltd.,）, Changping District, Beijing 102209, China)

机构地区：[1]华北电力大学电气与电子工程学院,北京市昌平区102206 [2]先进输电技术国家重点实验室(全球能源互联网研究院有限公司),北京市昌平区102209

出　　处：《中国电机工程学报》2018年第6期1846-1856,共11页Proceedings of the CSEE

摘　　要：混合式高压直流断路器分断操作是体现断路器本质特征的核心功能。断路器分断故障大电流这一暂态过程中产生的应力是断路器电气特性研究的重点。应力分析是断路器电气、结构和试验系统设计的理论基础,其相关研究尚属空白,需要进行全面详细的解析。该文首先在断路器拓扑结构和分断运行分析的基础上研究混合式高压直流断路器毫秒级分断全过程和微秒级换流过程相关应力特性,并论述两种时间维度暂态过程之间的联系。然后,建立的断路器PSCAD/EMTDC器件级运行数字仿真电路验证毫秒级分断过程和微秒级换流过程相关应力特性及其影响因子。最后,实施的200kV断路器整机,100kV、50kV断路器单元以及单一电力电子模块分断试验结果验证仿真电路和数学分析的准确性。该文结果可指导IGBT串联阀混合式高压直流断路器电气结构和试验系统的设计。Breaking operation of hybrid DC circuit breaker is the core function which reflects the essential features as current breaking equipment.The study of the turn-off stresses derived from the fault-current breaking transient process is the key content of the electrical characteristics research of the breaker,which is the theoretical basis of the electrical,structural and experimental system design and needs to be analyzed in detail.Firstly,based on the analysis of circuit topology and breaking operation,the stress characteristics both of the millisecond overall breaking process and the microsecond commutation process had been studied.The relationship between these two kinds of processes was discussed,which aim to extract the millisecond-level breaking process and the microsecond-level commutation process stress characteristics and influencing factors.Then,in order to verify the validity of these analyses,a device-level simulation model in PSCAD/EMTDC was built.Finally,the implementation of 200 kV hybrid DC breaker、100 kV breaker unit、50 kV breaker unit and single sub-module breaking test results verified the accuracy of the simulation circuit and mathematical analysis.As above,value of this paper mainly focus on electrical,structural design and test system design for hybrid DC circuit breakers with IGBT Series Valve.

关 键 词：柔性直流输电系统 IGBT串联阀 混合式高压直流断路器 子模块 关断应力 分断操作 

分 类 号：TM732[电气工程—电力系统及自动化]