新型中高压电子式电压互感器

New type MV & HV electronic voltage transformers

提出以微型电流互感器检测耦合电容器电流,再将电流信号传输至控制室,转换为与一次电压成正比变化的二次信号的方法构成中高压电子式电压互感器的技术方案。详细论述了新型中高压电子式电压互感器的传感原理及结构,并对耦合电容器、微型电流互感器、功率放大器等关键技术进行了讨论。对所研制的新型中高压电子式电压互感器进行了精度试验、二次短路试验,试验结果表明新型电子式电压互感器性能良好。

A technical scheme is proposed for MV ＆ HV vohage transformer,which uses micro current transformer to detect the current of coupling capacitor and converts the current signal into voltage signal proportionally in control room. The principle and structure of new-type electronic MV ＆ HV voltage transformer are introduced and the key technologies, such as coupling capacitor, micro current transformer and power amplifier,are analyzed. High voltage precision test and secondary short-circuit test are conducted, which show its better performance.