为有效评估特高压GIS特高频内置传感器的灵敏度及其监测范围,搭建了252 k V GIS等效脉冲注入实验平台。首先通过等效实验方法,建立252 k V GIS内典型缺陷5 p C放电量与等效注入脉冲信号波形之间的关系;结合252 k V GIS和1 100 k V GIS的特高频电磁波数值计算,仿真得到了1 100k V GIS内缺陷5 p C放电量下的等效注入脉冲信号的波形参数。针对特高压某站1 100 k V GIS的各种典型特高频传感器布置方式,开展有效监测范围的现场测试与评估,结果表明:特高压安吉站1 100k V GIS只有出线间隔布置方式的B相满足监测灵敏度的要求。最后提出特高频内置传感器优化布置计算方法,并依此提出了特高压某站1 100 k V GIS的特高频内置传感器优化布置方案。

In order to evaluate the sensitivity and monitoring range of UHF built-in sensor of UHV GIS, an equivalent impulse injection experimental platform of 252 k V GIS was established. Through the equivalent experiment method, relationship between the defective discharge capacity of 5 p C and equivalent impulse injection signal wave was established; according to values calculation of UHF electromagnetic wave of 252 k V and1 100 k V GIS, parameter of the equivalent impulse injection signal wave with the defective discharge capacity of 5 p C in 1 100 k V GIS was concluded by simulation. In accordance to the distribution mode of various typical UHF sensors in 1 100 k V GIS in a UHV substation, field test and evaluation on the effective monitoring range were conducted. The result shows that only phase B in alternative arrangement of 1 100 k V GIS in Anji UHV substation meets the monitoring sensitivity requirement. At the last, the paper presents an optimized arrangement and calculation method for UHF built-in sensors and thereof proposes an optimized arrangement scheme for UHF built-in sensor in 1 100 k V GIS in an UHV substation.