A High Power Quality Buck-H Auxiliary Power Converter in Railway Applications

DC voltage utilization and AC harmonics are important evaluation indexes for Auxiliary Power Converter in Railway Applications. To improve the above two indicators, a novel switch-mode modulation method quasi-PR control strategy Buck-H three-phase inverter is proposed this paper. The integrates side filter circuit into Buck circuit, which reduces volume of capacitor improves filtering effect. This uses only one high frequency switch per phase, switching losses thereby increases overall efficiency. In addition, absence shoot-through menace eliminates dead time requirement. Meanwhile, quasi-proportional-resonance (PR) controller its parameters optimized to tracking performance. influence PR on system performance analyzed detail. can effectively reduce harmonic distortion rate system. effectiveness verified through StarSim hardware-in-the-loop experimental results.