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一、引言测量高压大功率系统的交流电流通常是用电流互感器,但互感器的高压绝缘成本高,体积大。由于光纤的绝缘性能好,不受电磁干扰,而且轻巧,所以光纤电流传感器可降低成本,对400kv以上的电压系统尤其具有吸引力。光纤电流传感器有很多式样,但总的可分为三类:1.用包有磁伸缩材料的单模光纤干涉
I. INTRODUCTION AC current measured in high-voltage high-power system is usually measured by current transformers. However, the high-voltage insulation of transformers is costly and bulky. Fiber optic current sensors reduce costs and are especially attractive for systems over 400kv because of their good insulation properties, immunity from electromagnetic interference, and light weight. Optical fiber current sensor has many styles, but the total can be divided into three categories: 1. With a single-mode optical fiber telescopic material containing fiber interference