摘要:本文主要从同杆并架双回线路继电保护中存在的问题着手，分析了影响双回线路保护的因素，主要分析了过渡电阻和零序互感对双回线路继电保护的影响，绘制电力系统线路接线图，对系统图进行综合分析，同时对所给系统的500KV线路部分进行距离三段保护和纵联保护整定计算，以纵联保护作为主保护，距离保护作为后备保护，按照系统保护的要求进行保护配置，保证继电器保护有选择、速动、灵敏、可靠性的对线路进行保护，另外，在系统发生故障时，保护跳闸后，为保证供电可靠性、稳定性，本文主要讨论的双回线路故障自动重合闸合闸，根据系统发生的故障类型进行重合闸动作时限整定，最后对双回线路的保护配置进行综合重合闸设计。

关键词：双回线路 ； 继电保护 ； 自动重合闸

ABSTRACT:This article  mainly starts from the same tower double-circuit transmission line relay protection of existing problems, and analyzes the influence factors of double circuit transmission line protection, mainly analyzes the influences of the transition resistance and the zero-sequence mutual inductance on double-circuit transmission line relay protection of power system wiring diagram, draw the line, to make a comprehensive analysis of the system, at the same time on 500KV line the given system is part of the three section of distance protection and pilot protection setting calculation, the pilot protection as the main protection, distance protection as a back-up protection, protection configuration according to the system requirements for protection, guarantee the relay protection options, quick, sensitive, reliable protection, on line in addition, occurred in the system fault, tripping, in order to ensure the power supply reliability, stability, closing the automatic reclosing double-circuit transmission line fault mainly discussed in this paper, by reclosing time setting according to the type of fault system, the protection configuration of double circuit

synthesis reclosing design.

Key words: Double circuit transmission line ；relaying protection ；Automatic reclosing