KEPCO Journal on Electric Power and Energy

Korea Electric Power Corporation (한국전력공사)
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Impedance-Based Stability Analysis of DC-DC Boost Converters Using Harmonic State Space Model

  • Park, Bumsu (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Heryanto, Nur A. (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Lee, Dong-Choon (KEPCO Research Institute, Korea Electric Power Corporation)
  • Received : 2020.11.26
  • Accepted : 2021.09.27
  • Published : 2021.12.30
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Abstract

This paper proposes impedance-based stability analysis of DC-DC boost converters, where a harmonic state space (HSS) modeling technique is used. At first, the HSS model of the boost converter is developed. Then, the closed-loop output impedance of the converter is derived in frequency domain using small signal modeling including frequency couplings, where harmonic transfer function (HTF) matrices of the open-loop output impedance, the duty-to-output, and the voltage controller are involved. The frequency response of the output impedance reveals a resonance frequency at low frequency region and frequency couplings at sidebands of switching frequency which agree with the simulation and experimental result.

Keywords

Acknowledgement

This research was supported by Korea Electric Power Corporation (KEPCO). (Grant number: R18XA06-35).

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