一种35 kV大分区供电保护方案在地铁中的应用分析

摘要

The paper puts forward a large section power supply protection solution based on optical ifber differential and over-current protection cooperation, elaborates the protect hardware configuration and the protection logic configuration. Through analysis on typical fault protection actions under conditions of protective devices normal operation, protective devices or protective channel faults, the paper illustrates feasibility of application of this large section power supply protection solution in metro environment.%基于大分区环网供电模式下传统级差保护配置方案无法实现保护选择性的问题，提出一种基于光纤纵差与过流保护配合的大分区供电保护方案，阐述了该保护方案的保护硬件配置和保护逻辑配置。通过对保护装置正常运行、保护装置或保护通道故障情况下典型故障保护动作的分析，说明了该大分区供电保护方案在地铁使用环境中应用的可行性。