【作者】 刘莎；

【导师】 王富荣；

【作者基本信息】 西南交通大学 ， 电气工程， 2011， 硕士

【摘要】 我国铁路建设正在向高速、重载铁路快速进展,牵引负荷增加,使得牵引网电压下降。目前复线区段一般采用在供电臂末端通过分区所将上下行接触网并联的供电方式,已经不能完全满足接触网导流能力和电力机车工作电压的需要,若将馈线供电臂长度进一步缩短,会导致牵引变电所数量增加、电分相装置也就更密集。不但使牵引供电系统和外部电源建设投资增加,同时给电力机车运行带来更大困难。为此,必需研究、采用新的牵引供电方式——全并联供电方式。本文首先给出了全并联供电方式的概念,简要分析了其工作机理。对分开单边供电、末端并联供电及全并联供电的接触网阻抗进行计算比较,得出全并联供电方式下牵引网阻抗最小。全并联供电方式是通过在接触网中接入并联所来实现的。相关研究人员提出了三种并联所主接线形式的备选方案：单纯并联所、半分段并联所、全分段关联所。笔者分别对这三种接线形式进行了分析,并计算出这三种接线形式下接触网计划停电检修时的牵引网阻抗,进而比较出最优方案。针对选定的全分段并联所方案,分析其每个供电分区的故障情况,研究讨论其保护配置方案,并给出了相关保护的整定计算原则。然后对全分段并联所各组合开关的控制及组合开关之间的逻辑控制关系进行分析,确定其控制方案。最后分析全分段并联所的实现过程。确定全分段并联所在接触网的安装位置及接入方式。给出全分段并联所的结构类型。分析了主要设备的具体控制过程,完成并联所电气原理图的绘制。更多还原

【Abstract】 China’s railway construction characteristic of high-speed and heavy load is developing rapidly nowadays. Therefore traction loads increase increase severely, which makes traction electric network voltage decrease enormously. The power supply mode, which is up and down contact lines paralleled via section posts at the end of power arms, used in double track railways now cannot meet the capacity of contact lines’conductivity and electric locomotives’operating voltage. If the power supply arm length is further shortened, the number of substations will increase and device in neutral sections will become more intensive. This will not only invest more money in the traction power supply system and the construction of external power supply, but also bring more difficulties to run electric locomotives. Therefore, we must study and adopt new traction power supply-all parallel power supply.First, this paper introduced all sub-parallel power supply and analyzed its working principles. Then it made a comparison about the impedance value between separate unilateral power supply, end parallel power supply and all parallel power supply concluding the value of all sub-parallel wiring the smallest. Three options of the parallel power supply’s wiring:a simple parallel wiring, semi-sub-parallel wiring and all sub-parallel wiring were proposed in order to realize all sub-parallel power supply. According to the three wring types, the impedance value of each circuit was calculated when contact network was at both normal and abnormal operation, and then came to an optimal solution.In terms of the all sub-parallel power supply, the paper analyzed the fault of each power supply section, and discussed the program of protection and the relatively protection setting calculation. Then, it discussed the controlling of combination switch and the relationship between the combined switches’logic controlling, arriving at a controlling scheme.At the end of the paper, the parallel device’s installation location and access mode was settled and its structure was given. Then it discussed the process of the main control and completed the electrical schematics drawing. Key word Traction power supply system; All parallel power supply;Feeder protection; Engineering design更多还原