摘要
为探明低电压等级真空电路器开断并联电抗器过电压的产生机理,分析了真空断路器开断电抗器的研究现状,经过理论分析和仿真研究,并对挂网运行的某12kV真空断路器开断并联电抗器进行了多次试验研究,利用ATP-EMTP搭建基于电弧重燃特性的真空断路器模块,并搭建真空断路器开断并联电抗器三相仿真模型。仿真结果和现场试验结果基本一致,得出:12kV真空断路器开断并联电抗器时,首开相重燃并产生高频电流,经三相间耦合导致后开相也产生高频电流,但并未导致后开相高频截流。首开相重燃造成电抗器侧首开相产生严重过电压,达到60kV(7.0 p.u),后开两相未发生重燃,过电压幅值较小。最后,提出基于相控断路器开断电抗器,可有效降低过电压幅值,避免或减小断路器重燃几率。
In order to find the mechanism of over-voltage when vacuum circuit breaker switch off shunt reactor, the author simply summarizes the research status of vacuum circuit breaker switch off shunt reactor. Through theoretical analysis and simulation research, and field experiments of 12 kV vacuum circuit breaker switch off shunt reactor, established a three-phase simulation of the vacuum circuit breaker switching off shunt reactors in ATP-EMTP to simulate the field tests. The simulation results coincide almost with experimental results. It is concluded that when vacuum circuit breaker opens shunt reactor, the first open phase appears reignition and produces high frequency current, leads to the later open phase also produce high frequency current through three phase coupling, but did not cause the later open phase high-frequency closure. Overvoltage on the shunt reactor caused by first open phase reignition is 60 kv （7.0 p.u）, the later open two phase ware not renewed, so the overvoltage amplitude is smaller. Based on the phase control circuit breaker, which can effectively reduce overvoltage amplitude, avoid or reduce the circuit breaker renewed chance.
出处
《云南电力技术》
2017年第2期113-119,共7页
Yunnan Electric Power
基金
中国南方电网有限责任公司科技项目(KYN2014-104)
关键词
频繁开断
真空断路器
电弧重燃
高频截流
相控断路器
switched-off frequently
vacuum circuit breaker
reignition
high-frequency closure
phase control circuit breaker
