The Integrated Control System Of Hybrid Energy Storage And Driving For Electric Locomotive

Mine electric locomotive is the main means of transportation for coal gangue,material and equipment.At present,lead-acid battery is the most commonly used energy storage device,and dc motor is the electric locomotive driving the motor.Although this kind of electric locomotive has the characteristics of long endurance,no need to wire up,and convenient transportation,it needs more equipment for energy storage device charging,and its output performance is not superior enough.In addition,the starting of dc motor consumes a lot of energy,and the wear of internal commutator and brush will reduce the service life of motor parts.In this paper,in order to reduce charging equipment,and improve the drive the dynamic output performance,without any increase in energy consumption under the precondition of improve electric locomotive battery life as the main starting point,puts forward to a battery-super capacitor as a hybrid energy storage device,with heterogeneous permanent magnet synchronous motor as a traction motor of electric locomotive hybrid energy storage and drive the integration of topology and control system.Starting from the working environment of the electric locomotive,this paper analyzes the technical requirements of the electric control system of the electric locomotive,improves the original electric locomotive circuit topology,and designs a new type of electric locomotive hybrid energy storage and drive integrated circuit topology and its control strategy.In terms of topology,a hybrid energy storage device is composed of a battery with a high energy density and a super capacitor with a high power density.Permanent magnet synchronous motor with better driving performance at low speed is selected as the driving motor,and the winding of the motor is reconstructed to enable it to switch working mode and realize the integration of charge and discharge.A bidirectional DC/DC converter is added between the energy storage device and the driving motor to improve the overall charging and driving performance of the locomotive.In terms of charging control strategy,a phased constant current and constant voltage charging method is proposed.In terms of driving control strategy,it is proposed that the supercapacitor provides the acceleration energy,and the energy storage device quickly outputs a large current to improve the driving performance of electric locomotive.By the battery to provide uniform speed of energy,to ensure the smooth operation of the electric locomotive;The super capacitor absorbs the braking feedback energy of the permanent magnet synchronous motor when the electric locomotive decelerates,which is a power distribution method to extend the endurance time of the electric locomotive.Then,according to the design of the new electric locomotive hybrid energy storage and drive integrated circuit,its hardware circuit and software ideas are designed.Finally,in order to verify the feasibility and effectiveness of the new hybrid energy storage and drive integrated control system for mining electric locomotive,the simulation and physical experiment were carried out respectively.Simulation and experimental results show that the hybrid energy storage and drive integrated circuit can meet the requirements of normal operation,and can effectively improve the electric locomotive driving performance and endurance.Figure [68] table [4] reference [60].