Adaptive Smith predictor for enhanced stability of power hardware-in-the-loop setups

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Abstract

The stability and accuracy of power hardware-in-the-loop (PHIL) setups are sensitive to and deteriorated by the dynamics and nonideal characteristics of their power interfaces, such as time delay, noise perturbation, and signal distortion. In this article, a compensation scheme comprising a Smith predictor compensator is proposed to mitigate the impact of time delay on PHIL stability. Furthermore, an online system impedance identification technique is leveraged to enhance the robustness of the compensator and facilitate the compensation scheme with adaptivity to system impedance variation. Analytical assessment, simulation results, and PHIL experimental results are presented to verify the proposed compensation scheme. This scheme enables robust and stable testing of novel power technologies under varying impedance ratios representative of the complex scenarios emerging within the power sector.

Original languageEnglish
Pages (from-to)10204-10214
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Volume70
Issue number10
Early online date1 Dec 2022
DOIs
Publication statusPublished - Oct 2023

Keywords

  • compensation
  • power hardware-in-the-loop (PHIL)
  • robustness and stability
  • Smith predictor
  • time delay

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