电容式电压互感器的应用

Application of Capacitance Potential Transformer

由于电容式电压互感器的体积小、重量轻、维护工作量少、运行可靠 ,且兼有高频载波通道耦合设备的复用功能 ,所以得到大量的应用。但它在产生铁磁谐振的机理上、暂态响应和频率特性方面与串级式电磁型电压互感器不同 ,由于结构特点 ,在维护方面也存在一些特殊的问题。从电容式电压互感器的结构和工作原理出发 ,分析了上述存在问题对仪器测量精度和超高压线路快速继电保护的影响 ,从而提出了解决的方法 ,并结合实际运行经验 ,提出了运行中应注意的事项 ,以防止铁磁谐振、运行中渗漏油。

Because of its smaller size, lighter weight,less maintenance,higher operation reliability and combination function of carrier channel coupling equipment,the capacitance potential transformer has widly used in power system,but it differs from magnetic potential transformer in dynamic response,frequency characteristic and owing to construction speciallity there are some problems in maintenance existed. From the construction and operation principles of capacitance potential transformer,the affection of above problems to precision of measuring instrument and high voltage fast acting line protection equipment are analysed,then solving method to those is suggested and relating practical operation experiment,the considerable notice during operation are suggested to prevent ferro magnetic resonance,oil leakage,rust and pollute phenomenon.