Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Controllable Harmonic Generating Method for Harmonic Impedance Measurement of Traction Power Supply Systems Based on Phase Shifted PWM

  • Liu, Qiujiang (School of Electrical Engineering, Beijing Jiao University) ;
  • Wu, Mingli (School of Electrical Engineering, Beijing Jiao University) ;
  • Li, Jing (School of Electrical Engineering, Beijing Jiao University) ;
  • Zhang, Junqi (School of Electrical Engineering, Beijing Jiao University)
  • Received : 2017.05.04
  • Accepted : 2018.03.03
  • Published : 2018.07.20
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Abstract

The harmonic impedance characteristic of a traction power supply system (TPSS) is necessary for taking actions to suppress the high-order harmonic resonances caused by AC electric locomotives. This paper proposes a controllable harmonic generating method (CHGM) for measuring the TPSS harmonic impedance by injecting harmonic disturbances of different frequencies and amplitudes into the TPSS. This method applies phase shifted pulse-width modulation (PSPWM) and ensures that the undesired sideband harmonics can be negligible while the desired harmonic is both controllable and adjustable. Multiple harmonics can be emitted at the same time. The implementation of the method is also presented. Simulations are carried out to validate the performance of the proposed method. Finally, experimental results on a 5 H-bridge converters platform verified the effectiveness and feasibility of the proposed method.

Keywords

References

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