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Electrical Modelling of a DC Railway System with Multiple Trains ?

机译：多列直流铁路系统的电气建模？

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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.
机译：由于难以解决潮流，具有多个运行列车的铁轨的电气建模非常复杂。火车的位置，速度和加速度不断变化，从而形成非线性系统。在这项工作中，提出了一种用于建模直流电铁路以支持模拟地铁列车服务的潮流分析的方法。该方法利用MathWorks仿真工具Simscape，将其建模为轨道系统的机械和电气特性。可以对模型进行仿真，以提供轨道上任何位置的电压，以及任何列车所看到的电压。该模型包括列车上的再生制动，这被证明会导致如果馈电线路中的过电压高于当时其他列车的电力需求，则会导致过电压。制动电阻器通过燃烧多余的能量来保护网络免受过压。通过实施储能系统（ESS），可以通过有效控制铁轨电压来提高能源效率并消除电铁的时间表限制。本文提出了几种验证模型的方法。

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