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Calculation of Power Losses in a DC Traction Power-Supply System with Allowance for Train Traffic
Russian Electrical Engineering Pub Date : 2020-12-30 , DOI: 10.3103/s1068371220100028
A. V. Agunov , V. M. Varentsov , A. N. Marikin , D. A. Sokolov

Abstract

Based on an analysis of a train schedule, the probabilities of the occurrence of a certain number of trains in the intersubstation area are calculated. The currents and power losses in various traction power-supply system elements are determined for a fixed number of trains in the intersubstation zone. It is found that the obtained values of currents and power losses correspond to the probability of their occurrence, depending on the number of trains in the intersubstation zone. For this reason, it is concluded that the average values of currents and power losses in the traction network elements can be considered as mathematical expectations. Due to the fact that the electric traction load constantly moves through the intersubstation area with uneven current consumption in the presence of a different number of trains on the section, the available analytical calculating methods for power-system parameters have a significant error and make it possible to calculate the required values with a sufficiently high accuracy only for some railway sections. The use of probabilistic calculation methods for traction power-supply systems is a more universal tool for solving electrical problems in the power supply of railway transport, such as determining power consumption and power losses in the traction network.



中文翻译:

允许列车行驶的直流牵引电源系统中的功率损耗计算

摘要

基于对列车时刻表的分析,计算出变电站间区域中一定数量的列车出现的概率。针对变电站间区域中固定数量的列车,确定了各种牵引供电系统元件中的电流和功率损耗。已经发现,所获得的电流和功率损耗的值对应于它们出现的可能性,这取决于变电站间区域中列车的数量。因此,可以得出结论,牵引网络元件中的电流和功率损耗的平均值可以视为数学期望值。由于在路段上存在不同数量的列车时,电力牵引负载不断在变电站间区域内移动,电流消耗不均匀,电力系统参数的可用分析计算方法存在很大的误差,并且使得仅对于某些铁路路段就可以以足够高的精度计算所需值。在牵引供电系统中使用概率计算方法是解决铁路运输电源中电气问题(例如确定牵引网络中的功耗和功率损耗)的通用工具。

更新日期:2020-12-30
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