零值绝缘子是指悬式绝缘子串在运行中两端电位差为零的绝缘子片。根据DL/T596-1996《电力设备预防性试验规程》中的要求，每片悬式绝缘子的绝缘电阻不应低于300兆欧，500kV悬式绝缘子不低于500兆欧。低于上述水平的，一般就认为是低值或零值绝缘子。
大量研究结果表明，输电线路上的零值绝缘子可以通过流经杆塔接地线的绝缘子电晕脉冲信号检测出来。
Based on some research results, insulator corona pulses through the ground line of the tower could be used to identify faulty insulators on transmission lines.
因此，确定绝缘子串电位分布，对检测低、零值绝缘子，确保输电线路的安全、稳定运行具有重要的意义。
Therefore, to determine the potential distribution of insulator string is very important to detect the poor insulator and safety and stable operation of transmission line.
提出了一种基于电磁波检测的零值绝缘子诊断方法，即联合采用基于(特高频)uhf和(高频)HF的局放电流检测方法。
A diagnosis method of zero-value insulator based on electromagnetic wave detection is put forward, namely partial discharge detection method jointly using UHF and HF.
应用推荐