直供全并联供电并联所继电保护方案研究

Research on Relay Protection of Parallel-feeder Post with Direct Parallel-feeders Mode

文章针对直供全并联供电中不同的2种并联所主接线方案,分析了短路故障情况下并联所电流、电压和阻抗特性。根据分析结果,结合线路保护要求,推导了电流速断保护、反时限电流保护及定时限过电流保护、距离保护(阻抗保护)、失压保护、方向过电流、方向阻抗保护、纵联保护等线路保护方案的可行性及相关问题,得出了相关结论。

Aiming to the two different main line diagram options of parallel-feeder post which is used in the parallel-feed- er traction feeding system, this dissertation analyzes current voltage and impedance＇s characters, then according to the analyzing results and protection requirements, deduces feasibility and concerning problem of diverse protection options including emergency overcurrent protection, inverse overcurrent and definite overcurrent protection, distance （imped- ance） protection, low voltage protection, overcurrent protection with direction, impedance protection with direction, vertical protection etc, at last, draws the conclusion.