特高压断路器的瞬态恢复电压研究

结合晋东南—南阳—荆门1 000 kV特高压试验示范工程，研究了交流1100 kV断路器瞬态问题中的断路器开断短路电流或失步解列后的瞬态恢复电压(transient recovery voltage，TRV)内容。在此基础上提出了我国交流1100 kV特高压断路器的工作条件建议，分析了特高压断路器TRV问题的前景。认为我国特高压电网断路器在不采用分闸电阻的条件下，可满足IEC断路器扩展标准和正在修订的我国电力行业断路器标准中对TRV的要求。

A Study on Transient Recovery Voltage of UHV Circuit Breakers

The authors investigate the transient requirements of 1100kV AC circuit breakers mainly for China's Jin-Nan-Jing UHV pilot project.This research item includes two parts:(A) The transient recovery voltages (TRV) after circuit breakers interrupt the short-circuit currents or the current in out of phase condition:(B) The time constant of DC component of short-circuit currents and zero offset of current. Based on these results,the suggestion on transient requirements of 1100kV AC circuit breakers is presented.As the fast part of the research item,this paper focuses on the transient recovery voltages of the UHV circuit breakers after the short circuit current is broken or the gird is sectionalized due to fall-out of synchronism.According to the results in the UHV pilot project, it is anticipated that without using opening resistor,the TRV peak values and the rise rates of circuit breaker in the UHV power system fall within the allowed ranges prescribed in either the IEC circuit breaker standard extension or Chinese test condition for 1100 kV circuit breakers.