Urban Rail Train Auxiliary Power Supply System Simulation

Urban Rail trains running in the city on the ground floor, ground or elevated railway on the public transport. Urban rail system, auxiliary power train control system is an important part of their main task is to produce vehicles to meet the low-voltage power control, passenger lighting, air conditioning and ventilation units and other low-voltage electrical equipment required for the different voltage and electric power. Auxiliary power supply system of quality and reliability of electricity supply will directly affect the safe operation of vehicles and passenger comfort.Research and improve the performance of auxiliary power supply system to ensure stability, security, power train research and design staff is the main task.This article first urban rail trains on high-voltage transmission system of urban rail train technology, traction systems, as well as the main circuit train auxiliary power systems analysis and comparison. MATLAB simulation software and then use of a central component of the inverter device-IGBT, as well as the auxiliary power supply system of the main part of the implementation of the simulation, focusing on analysis of the inverter and pulse width modulation (PWM) principle and simulation results.Train equipment this paper is to study changes in the operational status of the auxiliary power supply system. Therefore, for a subway in Shanghai Pearl Line (Line 3) auxiliary power supply systems of vehicles, the establishment of a MATLAB simulation model parameters were related to changes in the set and the auxiliary power supply system simulation. Load by simulating changes in the size of the simulation to have different waveforms and thus the use of these wave-board equipment to analyze the load on the auxiliary power supply systems, as well as reduce the impact of the elimination of these measures and methods.Load sharing power to resolve the impact of the load can be taken step-by-step automotive equipment start-up or step-down descending order of frequency of start-up and other measures. The exchange of papers on high-power load when the load start-up measures taken in order to carry out the simulation, results show that the power of board to carry out a reasonable load-sharing group, according to a certain order of start-up, can significantly reduce the vehicle equipment in the start-up process of the impact of auxiliary power supply system.DC load to load, the paper load of DC auxiliary power supply system caused by interference effects are analyzed and put forward to resolve the interference of the methods and measures.