Interactive Dynamic Model Of Emu And Traction Network Of High-Speed Railway Based On Rtds

China’s high-speed railway was developing so fast in recent years that formed a large scale of high-speed railway network. Traction network and EMU were closely related and both of them were important to high-speed railway. They played decisive roles in the high-speed railway to guarantee its safety and stability. Using RTDS (Real-Time Digital Simulator) to model the traction network and the EMU interaction has an important significance to researching and testing. The modeling of traction network and the EMU interaction through Real-Time Digital Simulator (RTDS) was essential to analyze the operation of system and test the actual device.In this thesis, the traction admittance matrix and mathematical models were derived based on the multi-conductor transmission line theory from power system since for the deficiencies of current traction network computing. And the self-impedance and mutual impedance formula of underground loop were derived and mathematical formulas were described which can be used in computer programming. Based on CBuilder of RTDS, the traction network model for the both single and double track case was established using the C programming language to model the traction power supply system.Operating mode and control methods of two-level and three-level pulse rectifier were studied in this essay. The transient direct current control strategy was adopted in the appliance as a better choice, and the model of two-level and three-level pulse rectifier are created based on RTDS. The simulation experiment showed that the dynamic and static performance of system was favorable. Dual design of two-level pulse rectifier based on carrier phase shift was proved to have obvious effect to reduce the harmonic content of the current and voltage of the network side.Constant V/f principle was used to control the two-level and three-level pulse inverter control. The model of CRH1, CRH2, CRH3, CRH5-EMU are created based on RTDS. The wave of current match with the field measurement of CRH3when model of EMU works at tractional, constant and dormancy state.The closed-loop test of traction network and EMU interaction model and the actual physical device was proved successfully with additional voltage-current transformers and analog and digital input-output modules, indicates that the simulation model is correct and valid.