Modeling And Simulation Of Fuel Cell Diesel Engine Hybrid Locomotive

For a long time,locomotives is drived by internal combustion engines which obtained energy by burning fossil fuels,but their high energy consumption and environmental pollution lead to an increasing demand for clean energy.With the development of fuel cell technology,it has the ability to be applied to rail transit.The application of fuel cell in the rail transit field makes locomotives more energy-saving and environmentally friendly.The author studies the problems of locomotive modeling and system control strategy in this paper based on a certain type of hybrid locomotive.Firstly,according to the working principle of fuel cell,three-phase asynchronous motor and diesel engine,their models are established in MATLAB/Simulink and their performance is simulated.On this basis,a fuel cell-diesel parallel hybrid power system model is established.Then,based on the global optimal control strategy,the energy distribution scheme between fuel cell and diesel engine of hybrid electric locomotive is designed under four working conditions of starting,accelerating,decelerating and braking,and the output power of the hybrid power system under different operating conditions is simulated and analyzed.The simulation results show that the output power of the diesel engine and the motor matches the requirements of the locomotive under various working conditions,and the fuel cell system can play a good role in speed regulation during the driving process,which proves the feasibility of the control strategy.