TY - GEN
T1 - A Decentralized Power Coordination Strategy for Battery/Supercapacitor in DC Microgrids
AU - Bai, Yueqian
AU - Li, Qiru
AU - Zhang, Xiao
AU - Wang, Zhenxiong
AU - Yi, Hao
AU - Liu, Yuxin
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - The battery-supercapacitor (SC) based hybrid energy storage system (HESS) is widely used in DC microgrid to suppress the power fluctuation. Many coordination strategies have been proposed for HESS, but most of them rely on communication system. This paper proposes an enhanced dual virtual impedance droop strategy without communication for HESS. A high-pass filter-based virtual resistance droop control is used for battery converter to solve the issues of DC bus deviation state-of-charge (SoC) violation. An adjustable virtual impedance droop control applied to a SC converter can realize the constant current charge or discharge of the SC in the steady state to prevent the SC's SoC from exceeding the critical value. With the proposed control strategy, SC's SoC can be automatically recovery while considering boundary conditions, thus improving the service life. Moreover, the approach can realize the high and low frequency power sharing between the SC and the battery, and the bus voltage can be restored to the nominal value. Simulations are conducted to verify the effectiveness of the proposed control strategy.
AB - The battery-supercapacitor (SC) based hybrid energy storage system (HESS) is widely used in DC microgrid to suppress the power fluctuation. Many coordination strategies have been proposed for HESS, but most of them rely on communication system. This paper proposes an enhanced dual virtual impedance droop strategy without communication for HESS. A high-pass filter-based virtual resistance droop control is used for battery converter to solve the issues of DC bus deviation state-of-charge (SoC) violation. An adjustable virtual impedance droop control applied to a SC converter can realize the constant current charge or discharge of the SC in the steady state to prevent the SC's SoC from exceeding the critical value. With the proposed control strategy, SC's SoC can be automatically recovery while considering boundary conditions, thus improving the service life. Moreover, the approach can realize the high and low frequency power sharing between the SC and the battery, and the bus voltage can be restored to the nominal value. Simulations are conducted to verify the effectiveness of the proposed control strategy.
KW - battery
KW - decentralized control
KW - Hybrid energy storage system
KW - supercapacitor (SC)
UR - https://www.scopus.com/pages/publications/85170355458
U2 - 10.1109/PEDG56097.2023.10215174
DO - 10.1109/PEDG56097.2023.10215174
M3 - 会议稿件
AN - SCOPUS:85170355458
T3 - PEDG 2023 - 2023 IEEE 14th International Symposium on Power Electronics for Distributed Generation Systems
SP - 491
EP - 495
BT - PEDG 2023 - 2023 IEEE 14th International Symposium on Power Electronics for Distributed Generation Systems
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 14th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2023
Y2 - 9 June 2023 through 12 June 2023
ER -
