RESEARCH ON THE BASIC THEORY OF ADAPTIVE OPTICAL CURRENT TRANSDUCER

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.