A Novel Active Stabilizer Method for DC/DC Power Converter Systems Feeding Constant Power Loads

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3 Citations (Scopus)

Abstract

Multi-converter DC power distribution systems are widely used in different applications such as electric vehicles, more electric aircraft, and modern ships. In these systems, addressing the instability problems induced by constant power loads (CPLs) due to their negative incremental impedance characteristic has become an interesting research topic. Hence, in this paper, firstly, the stability of a DC/DC buck power converter system loaded by a CPL is analyzed through the system’s state-space averaging model, and then, its stability conditions are identified. Afterward, in order to overcome the destabilizing effect caused by the CPL, implementation of a novel active stabilizer scheme is presented. Using the proposed stabilizer technique, which has a simple control structure with a more straightforward tuning of control parameters, the system stability is guaranteed without affecting the dynamic performance of the system. This result is achieved by insertion of a virtual series RC in parallel with the output LC filter capacitor for satisfying the system stability criterion. In addition, practical constraints such as weight saving and low power dissipation are preserved, which are critical factors for the embedded DC power distribution systems. The circuit physical meaning realized by the proposed active stabilizer scheme is analytically proved. Simulation results are also provided to verify the effectiveness of the presented stabilizer.
Original languageEnglish
Title of host publicationProceedings of 2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)
Number of pages6
PublisherIEEE Press
Publication dateJun 2019
Pages2497-2502
Article number8781375
ISBN (Electronic)9781728136660
DOIs
Publication statusPublished - Jun 2019
Event2019 IEEE 28th International Symposium on Industrial Electronics (ISIE) - Vancouver, Canada
Duration: 12 Jun 201914 Jun 2019

Conference

Conference2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)
CountryCanada
CityVancouver
Period12/06/201914/06/2019
SeriesIEEE International Symposium on Industrial Electronics (ISIE)
ISSN2163-5145

Keywords

  • Constant power load (CPL)
  • DC/DC buck converter
  • Active stabilizer
  • Virtual series RC

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