XLPE电缆附件局部放电UHF和VHF联合检测

Detection of the Partial Discharge Signals in XLPE Cable Accessories Based on UHF and VHF

介绍了电磁耦合法测量XLPE电缆局部放电故障原理以及应用方法,重点比较了基于VHF(甚高频)传感器和UHF(特高频)传感器的检测方法在XLPE电缆局部放电在线监测技术中的应用。结合2种检测方法各自的优点与存在的弊病(VHF:衰减慢,可标定放电量,抗干扰能力差;UHF:抗干扰能力强,衰减快,不可标定放电量),推荐了XLPE电缆附件局部放电的UHF和VHF联合检测方法。

The theory and application of an electromagnetic coupling method to measure the partial discharge fault of the XLPE cable are presented here,with emphasis on comparing the two detection methods in XLPE Cable Partial Discharge Monitoring Technique based on the very high frequeney （VHF） sensors and ultrahigh frequency （UHF） sensorsConsidering with the advantages and disadvantages of the two detection methods （VHF：Slow attenuation,calibrated discharge,low antijamming capability; UHF：high anti jamming eapability,quiek attenuation,non - calibrated diseharge）,a UHF and VHF joint detection method of XLPE cable accessories partial discharge are recommended.