电容换相换流器(CCC)直流输电系统故障特性及恢复策略  

Fault Characteristics and Recovery Strategy of Capacitor Commutated Converter(CCC) HVDC Transmission System

作　　者：刘耀[1] 谢晨曦[2] 李新年[1] 王晶芳[1] 王华伟[1] 

机构地区：[1]中国电力科学研究院,北京市100192 [2]北京市电力公司海淀供电局,北京市100086

出　　处：《电力建设》2014年第8期38-42,共5页Electric Power Construction

基　　金：国家电网公司科技项目(XT17201200065)

摘　　要：研究了电容换相换流器(capacitor commutation converter,CCC)逆变侧的故障特性,以及避免逆变侧单相短路故障后发生后续持续故障的对策、原理及操作时序。借鉴交流系统高压线路串联补偿补技术原理,首次运用"可控旁通开关"思想,成功解决了CCC直流输电系统逆变侧发生故障后不易恢复的缺陷,并通过仿真验证了策略的可行性。研究结果对于进一步提高CCC直流输电系统的动态特性及CCC直流输电技术的进一步推广具有重要意义。This paper studied the fault characteristics of the inverter side of capacitor commutated converter （CCC）and the strategy,principle and operation time of the follow-up fault after avoiding a short single-phase fault.Based on the series compensation technology of HV lines in AC system,the defect that it was difficult to be resolved after the inverter side fault of CCC in DC transmission system was resolved successfully,by using the strategy of‘bypass breakers’for the first time. The feasibility of the strategy was verified through the simulation.The research results have great significance for the improvement of the dynamic characteristics of CCC HVDC transmission system and its further development.

关 键 词：电容换相换流器(CCC) 电网换相换流器(LCC) 高压直流输电 换相失败 故障恢复策略 

分 类 号：TM76[电气工程—电力系统及自动化]