TY - GEN
T1 - SOC-based Droop Control and Coordination for Hybrid Energy Storage Systems
AU - Song, Guangyu
AU - Liu, Xinghua
AU - Ma, Wentao
AU - Tian, Jiaqiang
AU - Chen, Badong
AU - Xiao, Gaoxi
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - A DC microgrid composed of photovoltaic (PV) units, LiFePO4 battery/supercapacitor (SC) hybrid energy storage systems (HESSs) and loads has become an essential part of new energy generation (NEG). This paper proposes a coordinated control strategy for the DC microgrid, which is accomplished by utilizing the LiFePO4 battery/SC HESS as the master unit and the PV/gas turbine (GT) as the slave units. The HESS coordinates PV and GT by employing state of charge (SOC) to prevent the system from overcharging or over-discharging. Specifically, this paper presents an adaptive SOC-based droop control strategy for HESS to adjust the bus voltage and charging and discharging rates. The designed droop factors change adaptively based on the SOC. Then a coordinated operation scheme is developed for the DC microgrid based on the state of DC bus voltage and the setting of upper and lower limits of SOC for HESS, where the PV unit switches between the maximum power point tracking (MPPT) control pattern and the constant voltage control (CVC) one. Also, the small-signal stability analysis is conducted for HESS. Simulation tests validate the effectiveness of the presented strategy.
AB - A DC microgrid composed of photovoltaic (PV) units, LiFePO4 battery/supercapacitor (SC) hybrid energy storage systems (HESSs) and loads has become an essential part of new energy generation (NEG). This paper proposes a coordinated control strategy for the DC microgrid, which is accomplished by utilizing the LiFePO4 battery/SC HESS as the master unit and the PV/gas turbine (GT) as the slave units. The HESS coordinates PV and GT by employing state of charge (SOC) to prevent the system from overcharging or over-discharging. Specifically, this paper presents an adaptive SOC-based droop control strategy for HESS to adjust the bus voltage and charging and discharging rates. The designed droop factors change adaptively based on the SOC. Then a coordinated operation scheme is developed for the DC microgrid based on the state of DC bus voltage and the setting of upper and lower limits of SOC for HESS, where the PV unit switches between the maximum power point tracking (MPPT) control pattern and the constant voltage control (CVC) one. Also, the small-signal stability analysis is conducted for HESS. Simulation tests validate the effectiveness of the presented strategy.
KW - Hybrid energy storage system (HESS)
KW - SOC control
KW - coordination
KW - droop control
KW - state of charge (SOC)
UR - https://www.scopus.com/pages/publications/85141170530
U2 - 10.1109/ICEICT55736.2022.9908863
DO - 10.1109/ICEICT55736.2022.9908863
M3 - 会议稿件
AN - SCOPUS:85141170530
T3 - 2022 IEEE 5th International Conference on Electronic Information and Communication Technology, ICEICT 2022
SP - 677
EP - 683
BT - 2022 IEEE 5th International Conference on Electronic Information and Communication Technology, ICEICT 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 5th IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2022
Y2 - 21 August 2022 through 23 August 2022
ER -
