金属氧化物避雷器阻性泄漏电流无线检测方法的设计

提出了一种测量金属氧化物避雷器阻性泄漏电流无线检测的新方法,该方法包括发送和接收两个装置。发送装置利用无线电理论,采集电网电压相位信号,并通过相应的电路将电网电压相位信号转换成脉冲信号进行调制后发送至接收装置。接收装置将接收到的电网电压相位脉冲信号进行解调后,与接收装置本身采集的避雷器全泄漏电流相位脉冲信号进行实时比较,得出电网电压和避雷器全泄漏电流的相位差,最后通过计算得出全泄漏电流的阻性电流分量,从而判断避雷器的性能。

Design of Resistance Leakage Current Wireless Measurement of Metal-oxide Surge Arrester

This paper suggests a new method to measure the resistance leakage current wirelessly for metal-oxide surge arrester. The method has two devices, transmitting module and receiving module. The radio theory is adopted to collect the voltage phase information and to change it in-to pulse signal with certain circuit. The transmit device modulates the signal with phase information and sends it to the RF receive device by radio. The pulse signal of phase is demodulated by the RF receive device and compared with the phase of total leakage current of surge arrester. Phase differences between the network voltage and total leakage current of surge arrester are obtained. Then, the value of resistance leakage current is calculated, and the state of MOA can be judged.