Electrical Modelling of a DC Railway System with Multiple Trains
Electrical Modelling of a DC Railway System with Multiple Trains
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DOI：
10.3390/en11113211
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发表时间：
2018-11
期刊：
影响因子：
3.2
通讯作者：
Hammad H. Alnuman;D. Gladwin;M. Foster
中科院分区：
文献类型：
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作者：
Hammad H. Alnuman;D. Gladwin;M. Foster
多列运行列车的铁路轨道的电气建模是复杂的，由于在解决的功率流的困难。列车的位置、速度和加速度是不断变化的，从而形成一个非线性系统。在这项工作中，提出了一种方法来模拟直流电气化铁路，以支持模拟地铁列车服务的潮流分析。该方法利用MathWorks仿真工具Simscape，使用它来模拟轨道系统的机械和电气特性。该模型可以被模拟以提供在轨道中的任何位置处的电压，并且另外提供由任何列车看到的电压。该模型包括列车上的再生制动，如果它高于当时其他列车的功率需求，则会导致馈电线中的过电压。制动电阻器用于通过燃烧多余的能量来保护网络免受过压。通过储能系统（ESS）的实施，可以通过有效地控制轨道电压来提高电气化铁路的能源效率并消除对电力线的限制。本文提出了几种方法来验证模型。
Electrical modelling of rail tracks with multiple running trains is complex due to the difficulties in solving the power flow. The train positions, speed and acceleration are constantly varying resulting in a nonlinear system. In this work, a method is proposed for modelling DC electric railways to support power flow analysis of a simulated metro train service. The method exploits the MathWorks simulation tool Simscape, using it to model the mechanical and electrical characteristics of the rail track system. The model can be simulated to provide voltages at any position in the track and additionally, the voltages seen by any train. The model includes regenerative braking on trains, this is demonstrated to cause overvoltage in the feeding line if it is higher than the power demand of the other trains at that time. Braking resistors are used to protect the network from overvoltage by burning the excess energy. Through the implementation of Energy Storage Systems (ESSs), it will be possible to improve the energy efficiency and remove timetabling restrictions of electric railways by effectively controlling the rail track voltage. The paper proposes several methods to validate the model.