Data Simulation Of Traction Power Supply System For High-Speed Railway

As China's economy and society are developing continuously,we are enhancing the railway construction to satisfy the demands of residents' travel and corporate transportation.The recent years have witnessed that the creation and development of high-speed railways become the national strategy.Trains on the high-speed railways feature considerable power,fast driving speed,large traction current,and high traffic density,requiring excellent stability and reliability of tractive power supply system.AT power supply mode has been widely used in high-speed railway for its advantages in power supply voltage level and power supply distance.Studying the power supply characteristics of the traction power supply system under AT power supply mode,understanding the changes of voltage and current with time on the condition that the traction network is short out,and when there are high-speed trains running on the traction network,building the database of related current and voltage,which is accessible for Unity 3D,the 3D virtual modeling software are all important to enable the software of the 3rd party to access.This paper analyzes the traction network of the ongoing high-speed railways under the all-parallel AT power supply by modeling and builds the multi-conductor-transmission chain network model of the traction network based on related theory,separate the traction network on determined distances,and analyzes the series impedance and parallel admittance of the traction sub-networks.It also focuses on the big amounts of transmission lines in the traction network and the large calculating quantity and analyzes the equivalent simplification method of the multi-conductor-transmission lines.The All-Parallel AT Power Supply System model constructed via the Simulink simulation software mainly include models of the traction substation,AT station,section station,traction network,short-circuit fault and D-series high-speed trains.In the model,there are common short-circuit faults set on different mileages of the traction network,and the model will output the data of voltage and current(changed with the time)on the T line and F line of the traction substation,AT station,and section station.Meanwhile,it also puts the train simulation model on different parts of the traction network and measures the voltage and current data on the T line and F line of the three stations while the train is running.After inputting the data of the simulation software in the database via Python,I edited the code of related functions by taking SQLite relational database as the tool to manage the database.Editing SQLite HP,the auxiliary script,through C# programming language on the editor of Monodeveloper,and encapsulating the series of methods of the controls of the Unity3 D to the related database,and editing related codes to realize the mutual access between the Unity3 D and the database.