电气化铁道直供分区所电气负荷的分析

Analysis of Electric Load of TRNF Section Post for Electrified Railway

研究目的:在复线电气化铁道供电臂末端设置分区所进行上下行并联供电,能有效提高牵引网电压水平和降低牵引网电能损耗。如何合理选择分区所的电气设备容量,确定电气设备的负荷能力,保证电气设备的安全运行,对此进行分析研究。提出分区所最大负荷电流和等效电流的计算方法,为合理选择电气设备提供依据。研究结论:分区所最大电气负荷出现在重负荷行车方向列车按追踪运行,同时轻负荷方向无列车运行的情况下;分区所的最大负荷电流和等效电流均与供电臂追踪间隔数呈线性增长关系;当供电臂追踪间隔数较少时,分区所最大等效电流可近似按上下行分开供电时供电臂重负荷方向首端等效电流的30%取值,当供电臂追踪间隔数较多时,分区所最大等效电流可取上下行分开供电时供电臂重负荷方向首端等效电流的1/4。

Research purposes： The section post is installed on the ends of feeding section for parallel feeding to up and down tracks on the double -track electrified railway, which can improve the voltage level and reduce energy loss of the traction electric network equivalently. In this paper, the researches are done on how to choose and determine the load capacity of section post rationally and the methods for calculating the maximum load current and the maximum equivalent current in the section post are presented so as to provide the basis for selection of electric equipments for section post. Research conclusions：The maximum traction load of seetion post arises under the conditions that the fleet trains run in the heavy- duty direction and no train runs in the light- duty direction. Both the maximum load current and the maximum equivalent current in the section post increase linearly with the increase of train quantity. The max. equivalent current of the section post can be taken approximately by 30% of the total current separately feeding to the up and down tracks at the first end in the heavy - duty direction when there is less fleet train and can be taken by quarter when there is much fleet train.