Design And Development For The Digital And Dynamic Simulation Platform Of High-Speed Railway Traction Power Supply System

With the rapid development of China’s high-speed railway, a large number of new lines will be in operation and business. Traction power supply system is an important part of the high-speed railway, one of which is to ensure safe, stable and reliable operation of critical systems. Compared with the normal speed railway, high-speed railway traction power supply system has a greater difference in the power supply and load characteristics, traction power supply system operators and technical personnel reserve accumulation both face enormous challenges. In order to adapt to the pace of development of China’s high-speed railway, the establishment of traction power supply system of digital simulation platform and dynamic training platform has important significance.Traction power supply system of electrical parameters calculation and analysis as core operating principle and foundation of simulation and training platform, establishing the accuracy of the simulation and training platform has an important role. Therefor, the paper launched a traction power supply system flow calculation methods and theoretical studies high-speed train simulation models. On this basis, respectively, the traction power supply system flow calculation simulation platform and CRH traction drive system simulation platform design were completed, which together constitute the high-speed railway traction power supply system digital simulation platform. Finally, a high-speed railway traction power supply system, a scaled-down dynamic simulation platform, was established.In the traction power flow calculation simulation platform, this paper gives a formula for calculating the impedance of traction network computer programming, Using of multi-conductor chain model, the main transformer traction mathematical models of complex networks and three common wiring was established; for the all parallel AT traction network which has multi-node admittance matrix order large number of cases, take use of the method of towing wire mesh combined multi-conductor model to reduce its order. By analyzing coupling characteristics of high-speed rail network and trains, put forwarded a constant power source equivalent locomotive to solve coupling characteristics of high-speed rail network and trains. Traction power supply system for light load, medium load, reload three different conditions of the trend calculation results show that the algorithm has a faster computing speed, and its electrical parameters such as voltage and current compliance were the actual situation. As this flow algorithm to calculate the core, using Matlab graphical user interface (GUI) to complete the design flow calculation platform.In the high-speed train traction drive system simulation platform, this paper analyzes the AC drive high-speed train traction rectifiers and inverters working principle and control strategy. Then the main components of the traction power supply system operating principle of mathematical modeling and analysis were completed. According traction rectifiers, inverters and control strategy works, using Matlab/Simulink set up to traction drive system simulation model which consider the operating characteristics of the high-speed train. Its operating characteristics and harmonic propagation characteristics were simulated. Simulation results show that the model parameters are reality, which can realistically reflect simulation runs and harmonic characteristics of high-speed trains. As calculate the core of simulation mode, take use of Matlab GUI design traction drive system simulation platform.Finally, according for the traction power supply system structure and operating principle described in the above section, the high-speed railway traction power supply system reduced scale parameters were calculated. Combining with on-site construction materials, the high-speed railway traction power supply system dynamic simulation platform were designed and implemented.