Observer-Based Backstepping Sliding Mode Control Design for Microgrids Feeding a Constant Power Load

Mohammad Alipour, Jafar Zarei*, Roozbeh Razavi-Far, Mehrdad Saif, Nenad Mijatovic, Tomislav Dragicevic

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

This paper deals with the problem of controller design for DC microgrids that feed constant power loads. To design the proposed controller, first by the use of the exact feedback linearization approach, the linear model of Brunovsky's canonical representation of the system has been obtained to address the nonlinearity problem of the system. Then, the desired control technique is developed by a combination of sliding mode and backstepping control approaches in which a nonlinear disturbance observer is utilized to estimate the disturbance. The overall stability of the system is analyzed based on the Lyapunov approach. A suitable and practical sliding surface is one of the controller strengths that allow the bus voltage to track the reference voltage with high accuracy and fast transient response. Finally, to prove the mentioned claims, an experimental setup has been constructed and the proposed controller is implemented. The experimental results have been analyzed and error analysis is performed. The results confirm the superiority of the proposed controller compared to state-of-the-art controllers.
Original languageEnglish
JournalIEEE Transactions on Industrial Electronics
Volume70
Issue number1
Pages (from-to)465-473
Number of pages9
ISSN0278-0046
DOIs
Publication statusPublished - 2023

Keywords

  • Backstepping sliding mode control
  • Nonlinear disturbance observer
  • Constant power load
  • Boost converter

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