葛南直流输电系统电子式互感器改造及现场应用

Ge-Nan HVDC Transmission System Electronic Transformer Reform and its Field Practice

目前电力系统内获得广泛应用的是电磁式互感器,但随着电力系统向大容量,高电压等级方向发展,电磁式互感器逐渐暴露出诸多缺点,比如绝缘结构复杂、造价高、尺寸大、测量精度低、存在二次线圈开路而产生高压的危险等;而电子式互感器克服了这些缺点。通过葛南直流输电系统直流测量装置的改造,比较了两种原理的互感器,并着重介绍了直流电子式互感器及其现场应用。

Now electromagnetic transformer is widely used in power system,while along with the electric power system expansion to larger capacity and higher voltage level,the electromagnetic transformer gradually revealed many shortcomings,such as complex insulation structure,high cost,low measurement precision and the danger of generating high voltage from the secondary coil open etc..By using electronic transformer can overcome these disadvantages.Through reform on Ge-Nan HVDC transmission system DC measurement apparatus,made a comparison between the two transformers with different working principle,emphasized on the introduction to HVDC electronic transformer and its field practice.