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http://dx.doi.org/10.18770/KEPCO.2021.07.02.255

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)
Publication Information
KEPCO Journal on Electric Power and Energy / v.7, no.2, 2021 , pp. 255-261 More about this Journal
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
Boost Converter; DC-DC; Harmonic State Space, HSS; Impedance-based Analysis; Stability;
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