Development of an Electrical Model for Multiple Trains Running on a DC 4th Rail Track

The electrical modelling of rail tracks with multiple running trains is complex due to the difficulties of solving the power flow. The trains' positions, speed, and acceleration change instantly which makes the system nonlinear. Additionally, the nonreversible substations are another reason for the nonlinearity of the system. These nonlinear characteristics of the rail system make the power flow analysis more complicated. In this paper, a simple method for modelling electric railways has been used to avoid complicated algorithms to solve the power flow. The method depends mainly on modelling the mechanical and electrical characteristics of the full rail track system using the simulation tool Simscape, which has been developed by MathWorks. The model is able to provide the track voltage and also the trains voltages. Through the implementation of Energy Storage Systems (ESS) it will be possible to improve the energy efficiency of electric railways by effectively controlling the rail track voltage and the trains contact voltages.

[1]  Sarath B. Tennakoon,et al.  Aspects of catenary free operation of DC traction systems , 2015, 2015 50th International Universities Power Engineering Conference (UPEC).

[2]  Thanatchai Kulworawanichpong,et al.  Multi-train modeling and simulation integrated with traction power supply solver using simplified Newton–Raphson method , 2015 .

[3]  Kuo-Lung Lian,et al.  Control strategies for improving energy efficiency of train operation and reducing DC traction peak power in mass Rapid Transit System , 2017, 2017 IEEE/IAS 53rd Industrial and Commercial Power Systems Technical Conference (I&CPS).

[4]  Pablo Arboleya,et al.  On board accumulator model for power flow studies in DC traction networks , 2014 .

[5]  Hui-Jen Chuang,et al.  Analysis of dynamic load behavior for electrified mass rapid transit systems , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[6]  Bin Wang,et al.  Optimal Energy Management, Location and Size for Stationary Energy Storage System in a Metro Line Based on Genetic Algorithm , 2015 .

[7]  Behrooz Vahidi,et al.  Evaluation and Control of Stray Current in DC-Electrified Railway Systems , 2017, IEEE Transactions on Vehicular Technology.

[8]  C. J. Goodman.  Overview of electric railway systems and the calculation of train performance , 2006 .

[9]  Bassam Mohamed,et al.  Modified Current Injection Method for Power Flow Analysis in Heavy-Meshed DC Railway Networks With Nonreversible Substations , 2017, IEEE Transactions on Vehicular Technology.

[10]  Shuai Su,et al.  Evaluation of Strategies to Reducing Traction Energy Consumption of Metro Systems Using an Optimal Train Control Simulation Model , 2016 .

[11]  Leon W P Peeters,et al.  Cyclic Railway Timetable Optimization , 2003 .

[12]  Takafumi Koseki,et al.  Train group control for energy-saving DC-electric railway operation , 2014, 2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA).

[13]  J. Van Mierlo,et al.  Quasi-static simulation method for evaluation of energy consumption in hybrid light rail vehicles , 2008, 2008 IEEE Vehicle Power and Propulsion Conference.