配电变压器局部放电现场测量方法的研究

Comparisons on Distribution Transformer Partial Discharge Site Measurement Methods

为保证干式变压器制造质量和现场安装质量符合规程要求,现场需要对其进行局部放电试验。介绍了一种采用三相正弦波变频电源对变压器三相局部放电信号进行同时检测的试验系统,可以简化试验设备,减少了更换接线工作量,缩短了试验时间,提高了试验效率。

With the acceleration of urbanization,increasing dry-type distribution transformers in high-rise buildings are putting into operation.To ensure the manufacturing quality and installation quality of dry-type transformer to accord with regulations,partial discharge measurement is necessary to be done at site.Intermediate frequency generator is usually used to do the measurement one by one.In this paper,we introduce a measuring system that adopts three-phase sine wave variable-frequency power to measure three-phase partial discharge simultaneously,which would simplify measuring equipment, reduce the workload and shorten measuring time,thus improving the measuring efficiency.