雷电流传感器低频相位补偿方法研究

Study on the Low-frequency Phase Compensation Method for the Lightning Current Sensor

雷电流的幅值和陡度是评估电力系统过电压和电子设备电磁兼容性的重要参数。因此,用合适的传感器测量雷电流的波形是必不可少的。利用自积分式罗氏线圈作为雷电流传感器,介绍了工作原理和特点。此外,为了提高自积分式罗氏线圈雷电流传感器的精度,提出了低频相位补偿法的设计过程和电路结构,实现了低频相位补偿。仿真和试验结果验证了低频相位补偿法可以提高自积分式罗氏线圈雷电流传感器的测量精度。

The amplitude and gradient of lightning current are important parameters for the evaluation of the overvoltage of the power system and the electromagnetic compatibility of electronic equipment.Therefore,it is indispensable to measure the waveform of lighting current with a suitable sensor.The working principle and characteristics of a self-integrating Rogowski coil used as a lightning current sensor was introduced in this paper.Furthermore,to improve the precision of the lighting sensor with the self-integrating Rogowski coil,the design process and circuit structure of the low-frequency phase compensation method were presented,and low-frequency phase compensation was realized.Simulation and test results verified that the low-frequency phase compensation method could enhance the measurement precision of the lightning sensor of the self-integrating Rogowski coil.