基于普克尔效应的双晶体互易型光学电压传感器  

A Reciprocal Optical Voltage Transformer with Double-Crystal Based on Pockels Effect

作　　者：温海燕 雷林绪 张朝阳 

机构地区：[1]国网智能电网研究院电力电子研究所,北京100192

出　　处：《电测与仪表》2014年第10期1-6,共6页Electrical Measurement & Instrumentation

基　　金：国家电网公司科技项目(SGKJKJ[2011]532)

摘　　要：提出了一种基于普克尔效应的双晶体互易型光学电压传感器，利用两块电光晶体抵消无用双折射引起的相位差，利用法拉第旋光器实现互易型光路模式，提高了光路的抗干扰能力。在常温条件下，对传感器进行了直流和交流实验。0～3kV的直流电压和0至约2．5kV的交流电压测试结果表明，传感器的输出和输入具有良好的线性关系，直流测量误差不大于±0．28％，电压较高时交流测量误差不大于±0．22％。传感器对于输入电压的响应迅速没有明显拖尾现象且输出稳定，交流波形不失真。实验结果表明了该系统方案的可行性。Based on Pockels effect, a reciprocal optical voltage transformer with double-crystal is presented. The phase difference induced by useless birefringence is offset using two pieces of electro-optic crystal. The reciprocal op- tical mode is realized using a Faraday rotator, which improves the anti-interference ability of the optical path. AC and DC tests on the transformers are conducted under normal temperature. Test results of 0 - 3kV DC voltage and 0 to a- bout 2. 5kV AC voltage show that the output and input of the transformer have ideal linear relationship with less than ±0. 28% DC measurement error and less than ±0. 22% AC measurement error. It also shows that the transformer re- sponds rapidly to the input voltage of the transformer without obvious delay, and the output is stable without AC output signal distortion. The experimental results show the feasibility of the proposed scheme.

关 键 词：普克尔效应 双晶体传感单元 光学电压传感器 

分 类 号：TM451[电气工程—电器]