高压设备局部放电监测用宽频电流传感器的研制

采用电磁感应原理设计出宽频带高灵敏度脉冲电流传感器。对其幅频特性进行了分析，总结出设计原理，即选择磁导率高、频率特性好的磁芯材料，适当地选择尺寸、积分电阻和线圈匝数，传感器可获得较大的带宽和一定的灵敏度，能够较准确地传递信号，可用于局部放电检测。运用所研制的传感器对试品中的局部放电信号进行了测试，给出了实测结果及局部放电波形。

On a Broadband Pulse Current Sensor For Partial Discharge Monitoring of insulation of HV Equipment

Based on the principle of electromagnetic induction, a pluse currentsensor with high sensitivity and broadband is designed. The amplitudefrequency characteristic is analysed. The design principle is that selecting the magnetcore meterial with high magnetic permeablity and preferable frequency characteristic and properly choosing dimensions, integral resistors and coil turns,then, a sensor with high sensitivity and broadband is obtained. It can transfersignals precisely and use for the partial discharge monitoring. By using the sensor, the test results and the partial discharge waveform are given.