自适应光学电流互感器的基础理论研究

RESEARCH ON THE BASIC THEORY OF ADAPTIVE OPTICAL CURRENT TRANSDUCER

针对阻碍光学电流互感器(OCT)实用化的测量温漂问题和不能长期稳定运行问题,文中在分析了光学电流互感器(OCT)的开环机理后,提出了相应的解决方法——自适应光学传感原理和螺线管聚磁光路结构。以标准检测系统为平台,按照测试标准IEC60044-8对自适应光学电流互感器进行了精度检测,检测结果表明自适应光学电流互感器稳态测量精度达到了0.2级,非周期分量电流的最大峰值瞬时值误差小于±1%。安装于河北省保定市某变电站的110kV线路上的自适应光学电流互感器已经连续运行了25个月,运行结果表明,自适应光学电流互感器具有长期运行稳定性。

Aiming at these two severe problems OCT faced, temperature excursion and no operating stability that baffled its utility in power system, the Adaptive Optical Transducing Principle and the Solenoid Collecting Magnetic Field Optical Path are presented to solve them, after analyzing the open loop mechanism of OCT. According to IEC660044-8, the performance of AOCT is examined roundly applying the standard testing system. The results indicate that under the steady state the measurement precision of the AOCT has already reached class 0.2 and under the transient state the maximal peak instantaneous alternating current component error of the AOCT has already reached class 1. AOCT was installed in a substation in baoding city HeBei province and has been working continuously twenty five months. The operating results have shown that the AOCT designed is operated stably.