Distributed Event-Triggered Fixed-Time Secondary Voltage Control and Automatic Power Sharing for MTDC Grids

Xinghua Liu, Jun Yan, Gaoxi Xiao, Xiaoyue Zhang, Tianyang Zhao, Peng Wang

Research output: Contribution to journalArticlepeer-review

Abstract

In this article, a novel distributed secondary voltage and active power-sharing control strategy with a Zeno-free event triggering mechanism is proposed, to overcome voltage deviation and inaccurate power-sharing caused by the conventional V-P droop control strategy in multiterminal high voltage direct current grids. The secondary controllers can achieve the voltage restoration and proportional active power sharing within a fixed time. Utilizing the Lyapunov method, the trigger function and trigger condition for the controllers of each voltage source converter (VSC) station are designed, resulting in a significant reduction in the number of controller triggers during system transients and steady state. The fixed-time stabilization theory is employed, which allows a faster convergence performance. Moreover, by using the tanh function, we can get rigorous proof of avoiding Zeno behavior. Finally, a simulation model of five connecting VSC stations is built to demonstrate the satisfactory performance of the proposed control strategy.

Original languageEnglish
JournalIEEE Systems Journal
Early online date14 Oct 2024
DOIs
Publication statusPublished - 14 Oct 2024

Keywords

  • droop control
  • Event-triggered distributed control scheme
  • fixed-time secondary voltage restore
  • MTDC
  • multi-agent

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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