500kV线路地线热稳定校验时的故障时间的取值问题

Valuing Failure Time during Check of Ground Wke Thermal Stability of 500 kV Line

文章通过继电保护动作时间和高压开关跳闸时间的分析,对500 kV送电线路OPGW和地线热稳定计算中的短路故障时间取值问题进行了探讨,提出校验500 kV线路地线热稳定时,短路故障时间可取0.15 s;校验500 kV线路OPGW热稳定时,短路故障时间可取0.2 s。

Through analysis on relay protection action time and trip out time of HV switches the author has explored the failure time valuing of short circuit in calculation of OPGW and ground wire thermal stability for 500 kV transmission line. He put forward that for check of ground wire thermal stability of 500 kV transmission lines the failure time of short circuit can take 0.15 s, while for check of OPGW thermal stability of 500 kV lines the failure time of short circuit can take 0.2s.