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Consensus-Based Distributed Secondary Frequency Control Method for AC Microgrid Using ADRC Technique

Author

Listed:
  • Wenguo Li

    (College of Information and Electronic Engineering, Hunan City University, Yiyang 413000, China)

  • Mingmin Zhang

    (College of Electronic Information and Electrical Engineering, Changsha University, Changsha 410000, China)

  • Yaqi Deng

    (College of Information and Electronic Engineering, Hunan City University, Yiyang 413000, China)

Abstract

To ensure safe and reliable operation, the ability to ride through various disturbances is vital for a microgrid with multi-inverters. As the voltage and frequency support comes from the power-electronic-based inverters, it is necessary to find a proper control strategy to improve the rejection ability of the DG inverter against disturbances. In this regard, this paper proposes a new distributed secondary frequency control approach for islanded microgrids, in which the main purpose is to remove the frequency deviation under droop control method with better disturbance rejection performance. Unlike many traditional approaches which rely on a detailed control model, the proposed one needs little model information thanks to the model-independent characteristic of active disturbance rejection control (ADRC) technique. A linear extended state observer is introduced to estimate the useless model dynamics (including unknown disturbances, unmodeled dynamics and nonlinear dynamics) which are then compensated in the control input. After the active compensation procedure, the nonlinear frequency control model can be converted into a quasi-linear model, based on which a proportional distributed control algorithm is established to restore the frequency and equalize the active power among the DGs. Simulation results based on a four-inverter-based microgrid show that the proposed approach achieves frequency restoration, active power sharing, as well as satisfactory disturbance rejection performance.

Suggested Citation

  • Wenguo Li & Mingmin Zhang & Yaqi Deng, 2022. "Consensus-Based Distributed Secondary Frequency Control Method for AC Microgrid Using ADRC Technique," Energies, MDPI, vol. 15(9), pages 1-19, April.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:9:p:3184-:d:803211
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    References listed on IDEAS

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    1. Shafaat Ullah & Laiq Khan & Mohsin Jamil & Muhammad Jafar & Sidra Mumtaz & Saghir Ahmad, 2021. "A Finite-Time Robust Distributed Cooperative Secondary Control Protocol for Droop-Based Islanded AC Microgrids," Energies, MDPI, vol. 14(10), pages 1-26, May.
    2. Ogbonnaya Bassey & Karen L. Butler-Purry, 2020. "Black Start Restoration of Islanded Droop-Controlled Microgrids," Energies, MDPI, vol. 13(22), pages 1-28, November.
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    Cited by:

    1. Jiawei Dong & Chunyang Gong & Jun Bao & Lihua Zhu & Yuanjun Hou & Zhixin Wang, 2022. "Secondary-Frequency and Voltage-Regulation Control of Multi-Parallel Inverter Microgrid System," Energies, MDPI, vol. 15(22), pages 1-25, November.
    2. Ensheng Zhao & Yang Han & Hao Zeng & Luqiao Li & Ping Yang & Congling Wang & Amr S. Zalhaf, 2022. "Accurate Peer-to-Peer Hierarchical Control Method for Hybrid DC Microgrid Clusters," Energies, MDPI, vol. 16(1), pages 1-27, December.
    3. Dong Zhao & Shuyan Sun & Ardashir Mohammadzadeh & Amir Mosavi, 2022. "Adaptive Intelligent Model Predictive Control for Microgrid Load Frequency," Sustainability, MDPI, vol. 14(18), pages 1-14, September.

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