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 Effective energy management of islanded microgrids using state of charge approach of energy storage systems
Tác giả hoặc Nhóm tác giả: HONG VIET PHUONG NGUYEN, NGUYEN VAN TAN, LAM NGUYEN-DINH, BINH NAM NGUYEN, DINH MINH DUC TRUONG
Nơi đăng: Journal of Engineering Science and Technology; Số: Số 4, Tập 17;Từ->đến trang: 2671-2687;Năm: 2022
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
In recent years, islanded microgrid systems have been operated by integrating renewable energy sources, diesel generators and energy storage systems for economical and efficient operation in providing power for local loads. Diesel generators contribute to stabilize the system's voltage and frequency, meanwhile the storage systems respond quickly to changes of the renewable sources’ output as well as the load demands. However, the capacity of the energy storage systems is limited and characterized by the state of charge. As a result, a proper energy management strategy based on state of charge of hybrid energy storage system is required to increase the reliability and economic operations of the islanded microgrid system. The research demonstrates the effectiveness of the proposed strategy based on Battery State of Charge approach to maintain the stability of the system frequency. State of Charge value is always maintained in the operational limit, in conjunction with the PV output limitation and load shedding scheme to retain the stability. Matlab/Simulink is used to obtain simulation results that show the efficiency of the proposed method.
ABSTRACT
In recent years, islanded microgrid systems have been operated by integrating renewable energy sources, diesel generators and energy storage systems for economical and efficient operation in providing power for local loads. Diesel generators contribute to stabilize the system's voltage and frequency, meanwhile the storage systems respond quickly to changes of the renewable sources’ output as well as the load demands. However, the capacity of the energy storage systems is limited and characterized by the state of charge. As a result, a proper energy management strategy based on state of charge of hybrid energy storage system is required to increase the reliability and economic operations of the islanded microgrid system. The research demonstrates the effectiveness of the proposed strategy based on Battery State of Charge approach to maintain the stability of the system frequency. State of Charge value is always maintained in the operational limit, in conjunction with the PV output limitation and load shedding scheme to retain the stability. Matlab/Simulink is used to obtain simulation results that show the efficiency of the proposed method.
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