变压器局部放电超高频信号外传播特性的试验研究

Experimental Study for Outside Propagation Characteristic of the UHF Signal Emitted by Partial Discharge in Transformers

介绍了目前内置超高频传感器在电力变压器局部放电监测中的应用情况,分析了利用外部传感器检测局部放电产生的超高频信号的可行性,设计了一套基于超高频法的电力变压器局放测量系统。实验结果表明,超高频电磁波可以透过变压器夹缝衍射出来,为变压器局部放电检测提供了一种新途径。

The application status of the internal UHF sensor for monitoring partial discharge in power transformers is introduced, and then the feasibility of using external UHF sensor for detecting partial discharge activities is analyzed. A measurement system based on UHF method for studying PD is designed. Experimental results show that the UHF signals can diffraction through the transformer＇s joint. Through detecting the diffraction UHF signals outside the transformer, it can be a new approach to detecting PD of transformers.