全并联自耦变压器供电系统馈线保护配置方案研究

Study on Feed Line Protection Disposition Plan of All-Parallel Autotransformer Power Supply System

根据全并联自耦变压器(AT)供电系统的特点,给出了一种可以有效减少故障影响范围的馈线保护方案,研究了每部分的保护配置以及整定计算方法,通过对牵引网不同位置短路点短路故障的分析,给出了各保护之间的时限配合关系,满足了瞬时性故障时尽快恢复供电,永久性故障时尽可能的减少停电范围,使故障线路退出运行的要求。

According to the features of all-parallel autotransformer power supply system, this paper gave a feed line protection plan which could effectively reduce coverage of fault influence and studied the method of each part＇s protection disposition and setting calcu- lation. Via analysis to short circuit faults of traction electric network at short circuit points of different positions, time limit coordination relation was given between each protection, meeting the requirements of recovering power supply as soon as possible at instantaneous fault, reducing power off range as less as possible at permanent fault and making fault line go from operation.