摘要
设计了一种混合式光电电流互感器 (HOCT) ,测量范围 3～ 2 5 0 0 A ,它用 Rogowski线圈采集电流信号并产生与该信号成比例的电压信号 ,再用有源发射电路将其转变成频率调制的光脉冲信号 ,通过光纤传送到低压侧的接收电路 ,解调还原为被测电流信号。实验表明该 HOCT性能良好 。
A hybrid optical current transformer (HOCT) based on the Rogowski coil and optical fiber transmission system for application to current measurement from 3 A to 2.5 kA is developed. The HOCT uses a Rogowski coil to detect the line current with an output of a voltage signal proportional to the magnitude of the current. An active transmitter converts the voltage signal to a frequency modulated optical pulse signal, which is transmitted to the low voltage side through optical fiber and finally detected and recovered by a receiver. Test results of linearity, ratio error and phase error are given. The results show that the developed transformer has advantage of measuring current without saturation.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2003年第3期52-53,共2页
High Voltage Engineering
