成都地铁1号线南延线动力与照明设计探讨

Design of Power and Lighting Systems for South Extended Project of Line 1 of Chengdu Metro

研究目的:地铁动力与照明系统承担着为地铁车站各种低压用电负荷提供电能的重要任务,涉及专业多,接口复杂。本文结合成都地铁1号线南延线一期工程,对地铁动力与照明系统设计的几个主要方面进行研究及探讨,论述变电所设置原则及运行方式,用电负荷的分类、动力与照明设备的主要设计原则。研究结论:(1)地铁车站长度200 m以下时,设置单一降压变电所可满足配电需要,但个别站台宽度过窄,电缆桥架敷设困难的车站应考虑设置两座变电所。(2)用电负荷计算时部分间歇性负荷应根据工况合理选择需要系数,部分消防负荷可不计入总计算负荷,有利于科学选择变压器容量。

Research purposes： The metro power and lighting systems undertake the major task of supplying electrical energy to the various low- voltage electrical load, and they are related to many different specialized trades with complicated interfaces. Combined with the first phase project of the south extended line of the Line 1 of Chengdu metro, the research and discussion were made on the several areas related to design of power and lighting systems and the introduction was given to the setting principle and operation mode of substation, the classification of electric load and the major design principles of power and lighting devices. Research conclusions： （ 1 ） When the length of Metro station is less than 200m ,one step - down substation can meet the needs of power distribution, but for the station with narrow platform and being difficult to install the cable bridge or rack, two substations should be built. （2） When calculating the electrical load, the reasonable coefficient should be chosen for the intermittent load according to the operating mode, and some fire equipment loads should not be counted in the total computational load for the scientific choice of transformer capacity.