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Distributed secondary control for discrete-time multirate microgrids with multiple description encoding strategies

  • 0Department of Control Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
Isa Transactions +

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October 1, 2025

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October 1, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

This study introduces a novel multiple description encoding scheme (MDES) for microgrids (MGs) to ensure reliable data transmission in distributed secondary voltage control. The method guarantees voltage restoration performance in discrete-time islanded MGs.

Area Of Science

  • Electrical Engineering
  • Control Systems Engineering
  • Networked Systems

Background

  • Microgrids (MGs) are vital for renewable energy integration.
  • Reliable data transmission via codec strategies is crucial for networked control in MGs.
  • Multi-rate characteristics of control and sampling require advanced solutions.

Purpose Of The Study

  • To develop a distributed secondary control strategy for discrete-time MGs using a multiple description encoding scheme (MDES).
  • To ensure reliable voltage restoration performance despite multi-rate sampling and control updates.
  • To propose an engineering-friendly design for the control gain matrix.

Main Methods

  • Establishing a linear single-rate model of distributed generators using feedback linearization and lifting techniques.
  • Constructing a distributed secondary voltage controller under MDES with zero-order compensation.
  • Deriving a sufficient condition for voltage restoration using Lyapunov stability analysis.
  • Proposing a control gain matrix design based on graph features and singular value decomposition.

Main Results

  • A sufficient condition dependent on channel parameters was derived, guaranteeing mean-square voltage restoration.
  • An engineering-friendly design scheme for the control gain matrix was proposed.
  • The proposed control scheme was validated through simulations on a modified IEEE 37-bus islanded MG system.

Conclusions

  • The developed MDES-based distributed secondary control scheme effectively restores voltage in discrete-time islanded MGs.
  • The proposed method ensures reliable control despite data transmission challenges and multi-rate operations.
  • The control gain matrix design is practical and validated by simulation results.

Keywords:

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