An Adaptive Passivity-Based Controller for Boost Converter Supplying Constant Power Load

Shichao Sun, Wenjie Liu, Yang Qi, Xinrong Huang, Weilin Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a robust and adaptive passivity-based controller (PBC) to regulate the output voltage of a DC-DC boost converter supplying a constant power load (CPL) paralleling with a resistor in dc microgrids which exhibiting limit-cycle behavior when CPLs dominate the load. Based on Lyapunov's theory, the limit-cycle behavior is analyzed in detail. This instability effect caused by CPLs has been attempted to be removed by introducing PBC, but the previously proposed PBC is not robust. The aim of this paper is to propose a new PBC with a certain degree of robustness. To deal with the steady-state error problem caused by the input voltage variation, the nonlinear disturbance observer (NDO) is added to PBC for disturbance estimation. The proposed PBC strategy is robust when dealing with load variation. The steady-state error caused by source variation is eliminated by introducing the estimated value of NDO into the design of PBC. The simulation results are provided to verify the effectiveness and robustness of the proposed control strategy.

Original languageEnglish
Title of host publicationIECON 2023 - 49th Annual Conference of the IEEE Industrial Electronics Society
PublisherIEEE Computer Society
ISBN (Electronic)9798350331820
DOIs
StatePublished - 2023
Event49th Annual Conference of the IEEE Industrial Electronics Society, IECON 2023 - Singapore, Singapore
Duration: 16 Oct 202319 Oct 2023

Publication series

NameIECON Proceedings (Industrial Electronics Conference)
ISSN (Print)2162-4704
ISSN (Electronic)2577-1647

Conference

Conference49th Annual Conference of the IEEE Industrial Electronics Society, IECON 2023
Country/TerritorySingapore
CitySingapore
Period16/10/2319/10/23

Keywords

  • constant power load
  • nonlinear disturbance observer
  • passivity-based control
  • stability analysis

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