Distributed sampled-data PID control for voltage regulation in inverter-based islanded microgrids using artificial delays

Bianca Caiazzo*, Emilia Fridman, Alberto Petrillo, Stefania Santini

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

This paper addresses and solves the secondary voltage regulation control problem in inverter-based islanded Microgrids (MGs) via a fully distributed delayed sampled-data PID controller, whose derivative action is approximated using finite difference. By choosing a small enough sampling period and leveraging artificial delays approach, the proposed strategy ensures the secondary voltage regulation with closed-loop performances similar to ones achievable via a continuous-time PID controller, but with a significant reduction of the communication burden, while improving the efficiency of the entire MG. Exponential stability of the closed-loop MG network is analytically proved via Lyapunov-Krasovskii theory and the derived sampling-dependent stability conditions are expressed as a set of LMIs, whose solution allows finding the weighted L2 gain. Finally, a detailed simulation analysis confirms the effectiveness and the robustness of the proposed approach.

Original languageEnglish
Pages (from-to)186-191
Number of pages6
JournalIFAC-PapersOnLine
Volume54
Issue number18
DOIs
StatePublished - 2021
Event16th IFAC Workshop on Time Delay Systems TDS 2021 - Guangzhou, China
Duration: 29 Sep 20211 Oct 2021

Keywords

  • Artificial Delays
  • Islanded MGs
  • LMIs
  • Sampled-Data control
  • Secondary voltage control

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