模块化三断口真空断路器动态分压特性  

Dynamic Voltage Distribution Characteristics of Modular Triple-break Vacuum Circuit Breaker

作　　者：吴高波[1] 阮江军[1] 黄道春[1] 舒胜文[1] 涂其华[1] 普子恒[1] 

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《高电压技术》2012年第11期2956-2963,共8页High Voltage Engineering

基　　金：国家"十一五"科技支撑计划重大项目(2009BAA19B05);国家电网公司重大科技项目(SG0846)~~

摘　　要：为得到基于40.5kV光控模块单元的U型三断口真空断路器的动态分压特性,给合理选择均压措施提供参考,通过低压、小电流的合成开断试验测量了该断路器弧后瞬态恢复电压(transient recovery voltage,TRV)的分配特性。同时通过试验验证了串接大电容使均压电容兼作分压器用的TRV测量方法的有效性。而对大电流弧后三断口真空断路器的TRV分配特性,基于连续过渡模型在PSCAD/EMTDC中进行了仿真分析。试验和仿真结果表明:小电流开断时,TRV分配特性与静态电压分配特性相近,静态均压设计可满足小电流开断的要求;大电流开断条件下,各断口残余电荷参数的差异可能对TRV分配产生显著影响;进行动态均压设计时,需要考虑断口不同期可能导致的TRV分配不均匀程度增大的问题。In order to obtain the dynamic voltage distribution characteristics of U-shaped triple-break vacuum circuit breakers based on 40.5kV fiber-controlled vacuum interrupter modules（FCVIMs）and to give references for choosing suitable voltage-sharing measures,synthetic breaking tests with low voltage and small current were carried out and the transient recovery voltage（TRV）distribution characteristics were measured.The measuring method for TRV by connecting a large capacitor with the grading capacitor in series was also verified through tests.Moreover,the TRV distribution characteristics after large current interruptions were analyzed by PSCAD/EMTDC based on the continuous transition model.Some conclusions are drawn from the test and simulation results：after small current interruptions,the TRV distribution characteristics are close to those of the static state and the static voltage sharing design can satisfy the requirements of small current interruptions;after high current interruptions,the differences of residual charge parameters among breaks may have a significant impact on the voltage distribution;the increase of non-uniform level of the voltage distribution caused by the asynchronies among breaks should be considered for the dynamic voltage sharing design.

关 键 词：三断口真空断路器 合成开断试验 瞬态恢复电压 均压电容 连续过渡模型 均压设计 

分 类 号：TM561[电气工程—电器]