用于绝缘子串泄漏电流测量的光纤电流传感器

摘要

针对当前绝缘子串泄漏电流测量过程中存在的电磁干扰问题,该文利用光电转换和光信号稳定性,设计并制作了一套基于发光二极管(LED)的光纤电流传感器装置,分析了光纤电流传感器的输出特性.利用标准波对传感器进行了标定,采用逐渐加压法监测绝缘子串的泄漏电流,实验室试验研究表明:该光纤电流传感器可以实现选择性的测量泄漏电流的正半周波或者负半周波,具有抗干扰能力强、线性度高、测量精度高等特点,可以满足对泄漏电流测量的基本要求.%For the problem of electromagnetic interference when measuring the leakage current of insulator string, this paper makes use of photoelectric conversion and light signal stability and proposes an optical fiber current sensor to measure leakage current of the insulator string, in which the light emitting diode (LED) is used to detect the current signal and the output performance of the sensor is also analyzed. The experiment results show that the optical fiber current sensor can meet the basic requirements of the leakage current measurement to achieve selective measurement of leakage current, the positive half cycle or negative half cycle, and has the advantages of strong anti梚nterference, well linearity and accuracy.