电力电容器主绝缘局部放电特性的研究

Study on Major Insulation Partial Discharge Performance of Power Capacitor

电力电容器主绝缘局部放电特性的提升将有效改善电力电容器的运行寿命,进而提升电网运行的可靠性。基于电力电容器主绝缘局部放电特性研究的试验模型,分析了引起电容器主绝缘局部放电的主要原因,研究了电力电容器主绝缘材料与局部放电特性之间的关系。结果表明,电力电容器主绝缘局部放电特性与针-板电极类似,通过增加主绝缘介质中的电容器膜的含量,可以有效提升电容器主绝缘局部放电特性,对电力电容器的设计和工艺改进提供了建议和理论参考。

The enhanced partial discharge performance of power capacitor can help promote capacitor lifetime, and furthermore improve the reliability of power system. In this paper, the origins of capacitor major insulation partial discharge and the relationships between different major insulation designs and partial discharge performance are investigated based on a special designed test model. The results show that the origins of major insulation partial discharge is in consistent with traditional pin-plate electrode system, and the partial discharge performance of the major insulation can be improved efficiently with the increase of polypropylene fihn proportion.