基于声电联合及振动的变压器类设备局部放电现场综合诊断方法

根据变压器和高压电抗器等设备结构及运行情况,利用特高频法、超声波法和振动法开展现场局部放电带电检测,对基于声电联合及振动带电检测的变压器类设备局部放电现场诊断方法进行了研究。以某500 k V线路高压电抗器为例,提出现场检测实施方法和信号分析、缺陷诊断方法。所提综合诊断方法有助于判断变压器和高压电抗器局部放电并诊断其缺陷类型及严重程度,提升了设备局部放电缺陷特别是较为严重的悬浮电位放电缺陷的现场检测水平。

On-site Comprehensive Diagnosis Method of Partial Discharge for Transformer Equipment Based on Ultrasonic Associated with Electromagnetic Wave and Vibration Test

On-site diagnosis method of partial discharge for transformer equipment based on ultrasonic associated with electromagnetic wave and vibration test is studied. According to the structure and running condition of transformer and HV reactor, the on-site partial discharge detection based on ultra high frequency method, ultrasonic method and vibration test is carried out. Taking HV reactor in 500 kV line for example, the methods for on-site dectection, signal analysis and fault diagnosis are proposed. The research is helpful in determining the partial discharge of transformer and HV reactor, diagnosing the fault type and its severity, and improving the on-site detection level of equipment partial discharge, especially serious suspension discharge.