电容式电压互感器油箱过热故障分析  

Analysis of CVT's Oil Tank Overheating Faults

作　　者：陈玉峰[1] 李永宁[2] 尹奎龙[1] 朱文兵[1] 董云先[3] 

机构地区：[1]山东电力研究院,山东济南250002 [2]济南供电公司,山东济南250012 [3]安徽华电宿州发电有限公司,安徽宿州234101

出　　处：《高压电器》2008年第5期486-488,共3页High Voltage Apparatus

摘　　要：电容式电压互感器虽与电磁式相比有许多优点,如不会与外部元件发生铁磁谐振、结构简单、绝缘裕度大等,但故障率也较高,较为常见的有电容器受潮、部分电容击穿等故障,而中间电磁单元由于种种原因产生故障致使油箱过热的事件也时有发生。笔者对几起油箱过热事件的过程及原因进行了介绍和分析,指出CVT油箱过热是由于电磁单元内部或外部故障使补偿电抗器保护电阻或阻尼电阻长期通流发热所致。Comparing with PT, CVT has many merits. For example, CVT doesn＇t occur ferromagnetic resonance with external elements, has simple structure and enough insulation excess, but CVT＇s faults ratio is still high. Capacitors damped and capacitor cake breakdown are familiar faults of CVT. But affairs of the oil tank overheating often occur because of middle electromagnetic units various faults. The paper introduced and analyzed the process and reasons of some fuel tank overheating incidents, and point out that, the overheating of the protection resistance and damping resistance by long-term caning current, which caused by internal and external faults of the electromagnetic units, are the main reason of the oil tank overheating.

关 键 词：电容式电压互感器 油箱 过热 

分 类 号：TM451[电气工程—电器]