Study On Control Method Of Hx_D2Electric Locomotion Converter

With the increase of our national economy,the total economic is rising.Our country had put forward higher requirements on transportation, especially for railway transportation.But the economic development was restricted by insufficient on the current railway transport capacity in China. This paper made a detail on rectifier circuit and inverter circuit about the locomotive of HXD2.First, the paper analyzed the development of locomotive overload。Combined with the international background.The paper summaried the history of the development of the electric locomotive series of "harmony" and made a detail for HXD2electric locomotive;Then, the paper made a detail for locomotive traction circuit structure and function of the core part of the current;Then, the paper analyzed the single-phase2-level rectifier circuit structure,mathematical model,control strategy and average current control algorithm;Then,the paper analyzed the3-phase-2-level inverter circuit structure,mathematical model,control strategy and SVPWM;At last,the paper made simulation model of single-phase traction rectifier and3-phase traction inverter under Matlab/Simulink condition.The simulation results showed that the ac side circuit can track grid voltage:in single-phase traction rectifier.The dc-bus voltage can stable well.The result showed the control strategy is correct. When the locomotive working on braking condition,the single-phase rectifier can work on invertering well.The cuttent put electrical energy back to the traction network.In the3-phase traction inverter circuit,the voltage and fruquency could use for traction motor well.And when the locomotive work on baking,The traction inverter could put energy back to the traction network through the circuit.