电力系统自动化2017，Vol.41Issue(4)：158-162,5.DOI:10.7500/AEPS20160616002
改善纵向调制光学电压互感器内电场分布的新方法
New Method for Improving Internal Electric Field Distribution of Longitudinal Modulation Optical Voltage Transformer
摘要
Abstract
The accuracy and stability of the optical voltage transformer (OVT),which is based on longitudinal modulation Pockels effect,are greatly affected by the uniformity of the electric field distribution in the crystals.Through an electric field simulation analysis of the multisegmented longitudinal modulation Pockels effect OVT,it is known that the electric field distribution in the BGO crystal is not uniform.When the position of crystal and the angle of incident light have a small deviation,the integral voltage error of the optical path in crystal is in general approaching or greater than 0.2％.To improve the electric field distribution in the crystal,a new method of quartz medium stratification is presented for the multisegmented longitudinal modulation Pockels effect OVT,and its effectiveness is verified by the finite element software ANSYS Maxwell and experiment.On the premise of ensuring the measuring sensitivity and an increase of the half wave voltage,the electric field integral error can be reduced to less than 0.05％ that meets the requirement of 0.2％.关键词
光学电压互感器/有限元分析/电场分布/测量误差Key words
optical voltage transformer (OVT)/finite element analysis/electric-field distribution/measurement error引用本文复制引用
陈霖扬,徐启峰,谢楠,谭巧..改善纵向调制光学电压互感器内电场分布的新方法[J].电力系统自动化,2017,41(4):158-162,5.基金项目
国家自然科学基金资助项目(51177016).This work is supported by National Natural Science Foundation of China (No.51177016). （51177016）
