一起220kV变压器局部放电故障的诊断及分析

Fault Diagnosis and Analysis of Partial Discharge in 220kV Transformer

介绍了一起220kV电力变压器局部放电检测及诊断案例。根据运行期间油色谱检测数据,判定变压器内部存在低能放电缺陷。采用多种带电检测技术进行综合诊断,分析变压器内部存在悬浮放电缺陷的原因。通过对缺陷处理后的变压器进行跟踪复测,验证了带电检测技术的准确性和有效性。

A field application case of 220 kV power transformer partial discharge detection and diagnosis is introduced.According to the data of oil chromatography during operation,the defect of low energy discharge in transformer is determined.The causes of suspension discharge existing in the transformer are analysed by using a variety of live detection techniques to cpmprenensive diagnosis.The accuracy and effectiveness of the live detection technology are verified by tracking and retest of the transformer after defect treatment.