基于OCT技术的自动增益均衡化方法设计与实现

Design and Implementation of Automatic Gain Equalizing Based on OCT Technology

介绍了基于法拉第效应的光学电流互感器(OCT)工作原理;给出了基于OCT技术的电力线路母线电流测试方案;为了实现对OCT的光强信号进行增益均衡化处理,提出了硬件实现自动增益均衡化方法,并利用锁相环技术实现了测量信号的相位同步;对OCT系统的测量误差进行了测试和分析,结果表明电流测量达到了互感器相关国家标准规定的0.2等级精度要求。

The principle of optical current transducer （OCT） based on Faraday effect was described. To process the two optical signals in the OCT current measure system, an automatic gain equalizing method achieved by the hardware circuit was presented, and the phase-locked loop （PLL） was used to realize the phase synchronization. The OCT system was also tested, the results show that its accuracy meets 0. 2P requirements of the GB/T 20840.8-2007 standard.