变压器振荡型冲击电压下的局部放电测量

Measurement of partial discharge under oscillatory impulse voltage for transformer

为了提高发现油浸式变压器潜伏性绝缘缺陷的能力,研究振荡型冲击电压下典型油纸绝缘缺陷的放电特性,掌握振荡型冲击电压下局部放电的特点和规律,提出了振荡型冲击电压试验同时进行局部放电检测的方法,开发了基于振荡型冲击电压的变压器局部放电检测系统,解决了局部放电脉冲的完整测量问题,初步实现了对局部放电的辨识和绝缘状态诊断。应用结果表明:该系统对于发现油浸式变压器绝缘缺陷是有效的。

In order to improve the ability of finding hidden insulation defect of oil-immersed transformer,researches the discharge property of typical oiled paper insulation defect under oscillatory impulse voltage,masters the characteristc and law of partial discharge under oscillatory impulse voltage,puts forward the measuring method of partial discharge when making oscillatory impulse voltage test,develops transformer partial discharge detection system based on oscillatory impulse voltage,solves problem of complete measurement for partial discharge pulse voltage,realizes preliminary the distinguishment of partial discharge and diagnosis of insulation state,the site application result shows that the system detecting insulation defect of oil-immersed transformer is effective.