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March 09, 2021 preprint Open access Aachen paper

Distributed Frequency Restoration and SoC Balancing Control for AC Microgrids

arXiv (Cornell University)

DOI: 10.48550/arxiv.2103.05576 Full text (OA) OpenAlex

Abstract

This paper develops an improved distributed finite-time control algorithm for multiagent-based ac microgrids with battery energy storage systems (BESSs) utilizing a low-width communication network. The proposed control algorithm can simultaneously coordinate BESSs to eliminate any deviation from the nominal frequency as well as solving the state of charge (SoC) balancing problem. The stability of the proposed control algorithm is established using the Lyapunov method and homogeneous approximation theory, which guarantees an accelerated convergence within a settling time that does not dependent on initial conditions. Based on this, to significantly reduce the communication burdens, an event-triggered communication mechanism is designed which can also avoid Zeno behavior. Then sufficient conditions on the event-triggered boundary are derived to guarantee the stability and reliability of the whole system. Practical local constraints are imposed to implement the control protocol, and the theoretical results are applied to a test system consisting of five DGs and five BESSs, which verifies the effectiveness of the proposed strategy.

Authors 4

  1. Chang Yu

    Wuhan University of Science and Technology

    Affiliation as printed

    Information Science and Engineering , Wuhan University of Science and Technology , Wuhan 430081 , PR China

  2. Xiaoqing Lu Aachen ON Energy Research Center

    Wuhan University of Science and Technology · RWTH Aachen University

    Affiliation as printed

    Information Science and Engineering , Wuhan University of Science and Technology , Wuhan 430081 , PR China

    ON Energy Research Center , RWTH Aachen University , Aachen 52074 , Germany

  3. Jingang Lai

    Wuhan University · Wuhan University of Science and Technology

    Affiliation as printed

    Information Science and Engineering , Wuhan University of Science and Technology , Wuhan 430081 , PR China

    School of Electrical Engineering and Automation , Wuhan University , Wuhan 430072 , PR China

  4. Li Chai

    Wuhan University of Science and Technology

    Affiliation as printed

    Information Science and Engineering , Wuhan University of Science and Technology , Wuhan 430081 , PR China

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References 34