电力系统及其自动化学报2017，Vol.29Issue(12)：1-7,13,8.DOI:10.3969/j.issn.1003-8930.2017.12.001
局部同塔输电线路的接地距离保护影响及对策
Effect on Ground Distance Protection and Measures for Transmission Lines Partially on the Same Tower
摘要
Abstract
There is zero-sequence mutual inductance between two lines partially on the same tower,which may lead to mal-operation or refusal of ground distance protection when a ground fault occurs on the transmission lines.In this pa-per,several typical tower structures are introduced,and the zero-sequence mutual inductances between two double-cir-cuit lines on the same tower are analyzed.A simulation model of double-circuit transmission lines partially on the same tower is founded based on the tower structure that has a larger zero-sequence mutual inductance.Specifically,the ef-fects of different fault positions on the ground distance protection for the transmission lines partially on the same tower are analyzed,and the corresponding improvement measures are proposed.The correctness and accuracy of the proposed method are verified by PSCAD.The research in this paper has practical significance and values for the improvement of ground distance protection of the double-circuit transmission lines partially on the same tower.关键词
局部同塔/零序互感/测量阻抗/故障位置/接地距离保护Key words
partially on the same tower/zero-sequence mutual inductance/measured impedance/fault position/ground distance protection分类
信息技术与安全科学引用本文复制引用
李斌,廖惠琴,戴冬康,姜宪国,杜丁香,李仲青..局部同塔输电线路的接地距离保护影响及对策[J].电力系统及其自动化学报,2017,29(12):1-7,13,8.基金项目
国家自然科学基金资助项目(51277130) （51277130）
