铁路枢纽中心牵引变电所供电布局研究

Research on the Power Supply Distribution of Central Traction Substation in Railway Terminal

研究目的:随着我国铁路建设的快速发展,铁路枢纽规模不断扩大,多条铁路干线引入交汇的大型客站不断出现,设置在大型客站附近的牵引变电所馈线数量通常多达十几条,成为中心牵引变电所,在实际运行中存在越区供电支援能力不足、检修困难等问题。本文从铁路枢纽中心牵引变电所供电单元高度集中的特点出发,结合GIS开关柜集中布置等因素,对铁路枢纽中心牵引变电所供电灵活性和可靠性的提升措施进行分析和讨论。研究结论:(1)在铁路枢纽大型客站附近设置两座单回进线单台主变的组合式中心牵引变电所供电支援能力强,但需与电力部门深入协商工程接口、计费方式等,以确定技术经济合理性和可实施性,该方式适用于新建铁路枢纽大型客站工程;(2)在既有铁路枢纽中心牵引变电所附近增建独立布置的27.5 k V高压室,将馈线按行别分段接线、分散布置,能有效提高供电支援能力,并提供较强的可靠性和可维护性,该方式适用于既有中心牵引变电所改造工程。

Research purposes:With the rapid development of Chinese railway construction,the railway terminal continues to expand,the large passenger railway stations connecting many railway lines appear continuously.The traction substations feeding the large passenger railway stations have dozens of feeders usually and become the central traction substation.In this paper,the measures of improving power support capability of central traction substation were analyzed and discussed based on the characteristics of high concentration of the power supply units and the GIS switch cabinets arrangement.Research conclusions:(1) A combined central traction substation included two substations with one traction transformer nearby the newly-built large passenger railway station will provide more power support capability,but the quantity and the investment of external power source engineering are high,the technical and economic rationality and the enforceability should been determined.This method adapts the newly-built large passenger railway station engineering.(2) The27.5 kV high-voltage room with independent layout should be built near existing central traction substation.The feeders are devided into sections and distributed according to different lines,which can improve power support capability,reliability and maintainability remarkably.The method is suitable for transformation project of the existing central traction substation.