Real-Time Simulation Implementatjion Of Metro Traction Main Circuit

To solve the problem of population explosion, traffic jam, environment pollution etc. coming with urbanization, our country is working on the construction of Urban Rail Transit. With its advantages such as large passenger volume, high speed, easy-to-take, more environment-friendly, less surface resource occupation, Metro holds a significant position in Urban Rail Transit System. Through many years of introduction and absorption, we gained some basic technologies in metro vehicle equipment manufacturing, but still we are stuck for some core technologies, traction control, for example. Metro Traction System is complicated, the vehicle starts and stops frequently, and the gates must be in the exact points where passengers get on and off when the metro arrives at the station, which extremely improved the performance demand of Traction Controller. To overcome the unavoidable limitations of off-line simulation like Matlab/Simulink, reduce the consumption of human and material resources for testing Traction Control Devices in the real system, it means a lot in theory and practice to find out some advanced test methods or platforms for accelerating the process and cutting the cost of Traction Control Devices research and development.First, this thesis combined with the status quo of power electronic technology and the demand of Metro Traction Control Devices research and development, Compared the pros and cons of existing simulation test methods, introduced some commonly used simulation methods in Traction Control Devices research and development, stated the significance of real feature in simulation test and achieved an implementation methods of real-time simulation.Then, according to the topology of Metro Traction Main Circuit, established the mathematical model part by part, simulated every circuit modules with Matlab\Simulink to obtain some reference for programming and debugging the virtual main circuit. Introduced some commonly-used time-discretization methods of mathematical model, analyzed the achievement difficulty and FPGA logic resource consumption of each method, chose the best discretization method for Traction Main Circuit. Based on the demand of Traction Controller test and the time-discretization mathematical model of Traction Main Circuit, settled logic resources, clocks, signal indicators, mutual I/O ports of FPGA board. Combined the FPGA board resources with the time-discretization mathematical model of Traction Main Circuit, programmed to achieve the Virtual Traction Main Circuit Simulation Model, debugged the virtual model referring to the off-line simulation results, and optimized its logic and sequential design.Finally, connected Traction Controller Units (TCU) with the Metro Traction Circuit real-time simulation model to verify the model’s reliability and validity. Probed into the possibility and cost to improve accuracy, flexibility and real feature of the real-time simulation model by optimizing internal signal data form, signal transmission, static parameter setting, Digital-to-Analog Conversion methods etc. Further explained the advance and practical value of real-time simulation for testing Traction Control Devices.