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Volume 16
Issue 2
10.3390/en16020665
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Article

Coordinated Control of Distributed Energy Storage Systems for DC Microgrids Coupling Photovoltaics and Batteries

by
Quan’e Zhang
1,
Zhigang Song
1,
Qiushi Ru
1,
Jiangwei Fan
2,
Lihui Qiao
2,
Mingche Li
2,
Licheng Wang
3,* and
Shuaibing Li
2,*
1
Longnan Power Supply Company of State Grid Gansu Electric Power Company, Longnan 746000, China
2
School of New Energy and Power Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
3
School of Information Engineering, Zhejiang University of Technology, Hangzhou 310014, China
*
Authors to whom correspondence should be addressed.
Energies 2023, 16(2), 665; https://doi.org/10.3390/en16020665
Submission received: 13 November 2022 / Revised: 24 December 2022 / Accepted: 29 December 2022 / Published: 5 January 2023
(This article belongs to the Special Issue Advances in Cooperative Control and State Estimation of Power Systems with Large Scale Renewable Energy Sources)
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Abstract

To adapt to frequent charge and discharge and improve the accuracy in the DC microgrid with independent photovoltaics and distributed energy storage systems, an energy-coordinated control strategy based on increased droop control is proposed in this paper. The overall power supply quality of the DC microgrid is improved by optimizing the output priority of the multi-energy storage system. When photovoltaic and energy storage work simultaneously, the proposed method can dynamically adjust their working state and the energy storage unit’s droop coefficient to meet the system’s requirements. In DC microgrids with energy storage units of different capacities, the proposed strategy can be used to maintain the stability of bus voltage, improve the equalization speed and accuracy of the energy storage state of charge, and avoid the shutdown of energy storage units due to overcharge or discharge. Verification of the proposed strategy is implemented with MATLAB/Simulink. The simulation results show the proposed control strategy’s effectiveness in balancing energy supply and demand and reducing the time of charging and discharging energy storage units.
Keywords: DC microgrid; multi-energy storage coordinated control; droop control; photovoltaic power generation DC microgrid; multi-energy storage coordinated control; droop control; photovoltaic power generation

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MDPI and ACS Style

Zhang, Q.; Song, Z.; Ru, Q.; Fan, J.; Qiao, L.; Li, M.; Wang, L.; Li, S. Coordinated Control of Distributed Energy Storage Systems for DC Microgrids Coupling Photovoltaics and Batteries. Energies 2023, 16, 665. https://doi.org/10.3390/en16020665

AMA Style

Zhang Q, Song Z, Ru Q, Fan J, Qiao L, Li M, Wang L, Li S. Coordinated Control of Distributed Energy Storage Systems for DC Microgrids Coupling Photovoltaics and Batteries. Energies. 2023; 16(2):665. https://doi.org/10.3390/en16020665

Chicago/Turabian Style

Zhang, Quan’e, Zhigang Song, Qiushi Ru, Jiangwei Fan, Lihui Qiao, Mingche Li, Licheng Wang, and Shuaibing Li. 2023. "Coordinated Control of Distributed Energy Storage Systems for DC Microgrids Coupling Photovoltaics and Batteries" Energies 16, no. 2: 665. https://doi.org/10.3390/en16020665

APA Style

Zhang, Q., Song, Z., Ru, Q., Fan, J., Qiao, L., Li, M., Wang, L., & Li, S. (2023). Coordinated Control of Distributed Energy Storage Systems for DC Microgrids Coupling Photovoltaics and Batteries. Energies, 16(2), 665. https://doi.org/10.3390/en16020665

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