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Secondary-Frequency and Voltage-Regulation Control of Multi-Parallel Inverter Microgrid System

Author

Listed:
  • Jiawei Dong

    (School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

  • Chunyang Gong

    (College of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China)

  • Jun Bao

    (Shanghai Xilong Technology Co., Ltd., Shanghai 201109, China)

  • Lihua Zhu

    (Shanghai Chint Power Systems Co., Ltd., Shanghai 201614, China)

  • Yuanjun Hou

    (Shanghai Da Yu Informational Tech Co., Ltd., Shanghai 200000, China)

  • Zhixin Wang

    (School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Abstract

As an important form of distributed renewable energy utilization and consumption, the multi-parallel inverter microgrid system works in both an isolated and grid-connected operation mode. Secondary-frequency and voltage-regulation control are very important in solving problems that appears in these systems, such as the distributed secondary-frequency regulation real-time scheme, voltage and reactive power balancing, and the secondary-frequency regulation control under the disturbances and unbalanced conditions of a microgrid system. This paper introduces key technologies related to these issues, such as the consensus algorithm and event-triggered technique, the dynamic and adaptive virtual impedance technique, and the robust and self-anti-disturbance control technique. Research and design methods such as small-signal state-space analysis, the Lyapunov function design method, the impedance analysis method, μ -synthesis design, and the LMI matrix design method are adopted to solve the issues in secondary-frequency regulation and voltage regulation. As the number of inverters increases, the structure of the microgrid becomes more and more complex. Suggestions and prospects for future research are provided to realize control with low-communication technology and a distributed scheme. Finally, for the case study, the droop-control model and primary frequency/voltage deviation of a multi-parallel inverter microgrid system is analyzed, and a state-space model of a multi-parallel inverter microgrid system with a droop-control loop is established. Then, the quantitative relationship between the primary frequency/voltage deviation and the active and reactive power output in the system is discussed. The methods and problems of centralized and decentralized secondary-frequency regulation methods, secondary-frequency regulation methods based on a consensus algorithm and an event-triggered mechanism, reactive power and voltage equalization, power distribution, and small-signal stability of the multiple parallel inverter microgrid system regarding the virtual impedance loop are analyzed.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:22:p:8533-:d:973650
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    References listed on IDEAS

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    1. Hubert Bialas & Ryszard Pawelek & Irena Wasiak, 2021. "A Simulation Model for Providing Analysis of Wind Farms Frequency and Voltage Regulation Services in an Electrical Power System," Energies, MDPI, vol. 14(8), pages 1-17, April.
    2. 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.
    3. Elutunji Buraimoh & Anuoluwapo O. Aluko & Oluwafemi E. Oni & Innocent E. Davidson, 2022. "Decentralized Virtual Impedance- Conventional Droop Control for Power Sharing for Inverter-Based Distributed Energy Resources of a Microgrid," Energies, MDPI, vol. 15(12), pages 1-16, June.
    4. Zhilin Lyu & Qing Wei & Yiyi Zhang & Junhui Zhao & Emad Manla, 2018. "Adaptive Virtual Impedance Droop Control Based on Consensus Control of Reactive Current," Energies, MDPI, vol. 11(7), pages 1-17, July.
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