电力系统及其自动化学报2019，Vol.31Issue(4)：10-16,7.DOI:10.19635/j.cnki.csu-epsa.000160
适用于同塔混压线路跨电压故障的距离保护新方法
Novel Distance Protection Method for Multi-voltage Lines on the Same Tower under Cross-voltage Fault
摘要
Abstract
Cross-line fault is a typical type of fault for multi-circuit transmission lines on the same tower. The calcula?tion of cross-line impedance of multi-voltage multi-circuit lines on the same tower needs to take the differences between impedance parameters of lines at different voltage levels into account. In this paper,a calculation method for cross-volt?age cross-line impedance,which is suitable for multi-voltage double-circuit lines and typical multi-voltage four-circuit lines on the same tower,is proposed. This method uses the positive-sequence impedance of one circuit to represent the cross-line impedance of two circuits with different impedance parameters;meanwhile,it considers the influence of zero-sequence mutual inductance between lines. On this basis,a novel application method for the first-zone distance protec?tion is proposed based on cross-voltage cross-line impedance. Simulation results with EMTP show that the cross-line im?pedance calculated by the proposed method can reflect the distance from the fault location to the installation position of protection.关键词
同塔多回输电线路/跨电压等级故障/跨线阻抗/距离保护Key words
multi-circuit transmission lines on the same tower/cross-voltage fault/cross-line impedance/distance pro⁃tection分类
信息技术与安全科学引用本文复制引用
王文博,赵青春,谢华,李斌,姚斌..适用于同塔混压线路跨电压故障的距离保护新方法[J].电力系统及其自动化学报,2019,31(4):10-16,7.基金项目
智能电网保护和运行控制国家重点实验室资助 （）
