南方电网技术2023，Vol.17Issue(11)：130-137,147,9.DOI:10.13648/j.cnki.issn1674-0629.2023.11.013
基于准两相跳闸的同杆双回输电线路跨线故障跳闸策略
Quasi Two-Phase Tripping Based Line-To-Line Fault Tripping Strategy on Double-Circuit Transmission Lines on the Same Tower
摘要
Abstract
The comprehensive tripping strategy and quasi three-phase tripping strategy are adopted for the double-circuit transmission lines on the same tower,which may trip all the phases of the double-circuit transmission line during line faults,and result in large-area generator tripping and load shedding of weakly stable systems including wind power and photovoltaic,which worsens the transmis-sion environment of the power grid and seriously reduces the operation stability of the power system.In response to this issue,a quasi two-phase tripping strategy suitable for cross-line grounding faults in double-circuit transmission lines on the same tower is proposed,which can reduce the tripping probability of all phases of double-circuit transmission lines and provide a stable coupling source for the fault phase.Firstly,the topology analysis method is used to establish models for the comprehensive tripping strategy and quasi three-phase tripping strategy of transmission lines,and the impact mechanism of the tripping strategy on fault property determination is analyzed.Secondly,considering the consistency of transmission continuity and fault nature judgment,a quasi two-phase tripping strategy suitable for cross-line faults on double-circuit transmission lines on the same tower is proposed.Finally,the correctness and feasibility of the quasi two-phase trip strategy are verified through PSCAD/EMTDC simulation experiments.关键词
同杆双回输电线路/跨线故障/拓扑分析/准两相跳闸策略Key words
double-circuit transmission lines on the same tower/line-to-line faults/topological analysis/quasi two-phase tripping strategy分类
信息技术与安全科学引用本文复制引用
周伟绩,李凤婷,解超,王宾,岳菁鹏..基于准两相跳闸的同杆双回输电线路跨线故障跳闸策略[J].南方电网技术,2023,17(11):130-137,147,9.基金项目
国家自然科学基金资助项目(51877185). Supported by the National Natural Science Foundation of China(51877185). （51877185）
