局放检测技术在避雷器状态诊断中的应用

主要介绍了局部放电检测技术在避雷器状态诊断中的一次成功应用的案例。针对避雷器泄漏电流出现异常的情况,将高频CT及示波器应用于现场检测中,确定了避雷器内部的局部放电缺陷。在实验室对缺陷避雷器进行局放试验确定放电类型以及评估严重程度,对避雷器解剖发现避雷器内部存在金属间隙的放电,该缺陷对避雷器有致命威胁。

Application of Partial Disharge Detection Technology in Surge Arrester State Diagnosis

This article mainly introduces a successful application case which used the partial discharge detection technology to diagnose the state of arrester.The high frequency CT and oscilloscope are used in on-site detection,for abnormal leakage current of arrester,and the PD defects inside arrester have been identified.At last,the type of discharge and the assessment of severity are determined through arrester partial discharge test in the laboratory.It is found that the surge arrester exist interior metal gap discharge by disassembling it,and the defect on the arrester has deadly threat.