Based on the Partial Discharge Live Detection and Test Analysis of 220 kV Cable Terminal Defect Time Difference
The running state of power installations such as transformers,cable joint as well as cable terminal can be judged by live-line detection,the breakdown of power installations can be avoided by discovering the partial discharge caused by internal defects through this way.Based on the abnormal discharge signals detected on the 220 kV cable termi-nal,the brief basic information was described first in this paper.The live-line detection and test results were presented ac-cording to the high frequency detection and oscillatory wave test instruments.Then the off-line laboratory test and disas-sembly test were carried out and then the abnormal partial discharge signals and abnormal phenomena such as powdered attachment and semi-conducting partical founded during disintegration were analyzed in detail.Finally,comprehensive a-nalysis ascribes this cable terminal defect to the construction technology faultiness.
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