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当前越来越多的地铁供电系统采用大分区供电方案,在这一供电模式下,传统的电流级差保护方案已经无法保障供电的保护选择性,因此,提出光纤差动保护及过流保护相配合、电流选跳保护优化的大分区供电保护方案。文章通过对光纤差动保护、过流保护相配合的保护配置方案进行叙述,提出了保护装置在正常和故障情况下的典型故障保护动作,最后提出了电流选跳优化保护方案,通过这几个方面总结了35k V供电系统中大分区保护方案的应用。
At present, more and more subway power supply systems adopt a large-area power supply scheme. In this power supply mode, the conventional current-level differential protection scheme can not guarantee the protection selectivity of the power supply. Therefore, optical differential protection and overcurrent protection are proposed , The current jump protection optimization of the large district power protection program. The article describes the protection scheme of optical fiber differential protection and overcurrent protection, puts forward the typical fault protection action of the protection device under normal and fault conditions, and finally puts forward the optimization scheme of current jump selection. Summarized the 35k V power supply system in the partition protection program applications.