1000kV特高压断路器的瞬态恢复电压  

Research on Transient Recovery Voltage of UHV Circuit Breakers

作　　者：周沛洪[1] 谷定燮[1] 戴敏[1] 娄颖[1] 

机构地区：[1]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2009年第2期211-217,共7页High Voltage Engineering

基　　金：国家电网公司重点科技项目1000kV级交流特高压输变电工程关键技术研究(ZX07-07)~~

摘　　要：为了合理地确定特高压断路器瞬态恢复电压(TRV)的试验参数,依托淮南-皖南-浙北-沪西1000kV同塔双回线路输电工程,研究由特高压系统回路特性产生的特高压断路器预期瞬态恢复电压。采用EMTP模拟计算方法,统计分析了变压器限制的短路故障(TLF)、断路器端部故障(BTF)和失步开断下的瞬态恢复电压,提出了以下建议:将DL/T402-2007中特高压断路器T10和T30规定的恢复电压上升率(RRRV)值由7kV/μs和5kV/μs分别提高至10kV/μs和7kV/μs;此工程失步解列点可指定在皖南站。比较了断路器装分闸电阻的优缺点,建议此工程可不装分闸电阻。这些建议均被同塔双回线路输电工程采用。In order to confirm test parameters of the transient recovery voltage （TRV） of UHV circuit breakers reasonably, we investigated the prospect transient recovery voltages （TRV） of UHV circuit break on the basis of UHV system characteristics for the UHV Huainan- Wannan-Zhenxi-Huxi double circuit transmutation project in China. The TRVs of transformer limitative fault（ TLF）, break terminal fault（BTF） and out-phase breaking were statistically analyzed by EMTP simulation calculation. It is suggested that the RRRV 7 kV/μs at T10 load and 5 kV/μs at T30 load ,which are specified by standard DL/T 402 2007, should be increased to 10 kV/μs and 7 kV/μs, respectively, and the out-phase splitting point can be specified at Wannan station. The comparison of the advantage and disadvantage of opening resistor suggests that the UHV breaker of this project does not need opening resistor. Those suggestions have been adopted by the UHV transmutation project.

关 键 词：特高压 断路器 三相接地故障 暂态恢复电压(TRV) 恢复电压上升率(RRRV) 分闸电阻 

分 类 号：TM561[电气工程—电器] TM72