电力系统自动化2016，Vol.40Issue(23)：131-135,162,6.DOI:10.7500/AEPS20151129006
输电线路光差动保护初探
Research on Optical Differential Protection of Transmission Lines
摘要
Abstract
An all-fiber optic current transformer measures current in the conductor according to Faraday magneto-optic effect, with a wide measuring range,excellent nonlinearity and no magnetic saturation.Since the magnetic field effect of the current can be superimposed,measurement of differential current from transmission line with sensing optical fiber can be replaced by direct calculation of Faraday magneto-optical effect deflection angle at the level of optical path with optical components,which means differential current of the transmission line can be acquired without complicated time synchronization to constitute differential protection.An optical differential protection model is built with PSCAD,the simulation results showing using the optical differential protection to measure differential current can reflect the variation of actual differential current while optical differential protection using fixed threshold value has a higher sensitivity to fault in the area and definite reliability for one outside.关键词
全光纤电流互感器/光差动保护/差动电流测量/仿真分析Key words
all-fiber optical current transformer/optical differential protection/differential current measurement/simulation analysis引用本文复制引用
樊占峰,宋国兵,陈玉,赵应兵,明浩..输电线路光差动保护初探[J].电力系统自动化,2016,40(23):131-135,162,6.基金项目
This work is supported by National Natural Science Foundation of China(No.51477061) （No.51477061）
