TY - JOUR N2 - Energy storage technology (EST) is an effectiveway to improve the power quality of renewable energy generation (such as solar energy and wind energy), but a single energy storage system (ESS) is difficult to meet the demand for the safe operation of the grid. According to the structure and operation characteristics of the existing battery/super-capacitor hybrid energy storage system (HESS), a battery/super-capacitor HESS is proposed. The working principle and three working modes (the super-capacitor pre-charging cold stand-by mode, the boost mode and buck mode) of the HESS are analyzed in detail. The state equations of the boost mode and buck mode are derived. The state space average method is used to establish the small signal equivalent model under the buck/boost mode. More-over, the charge and discharge control strategy of the HESS is obtained by combining the voltage closed-loop control. The simulation model is built in Matlab/Simulink to verify the effectiveness of the proposed HESS and its control strategy. The results show that the HESS and its control strategy can ensure the DC bus voltage has good stability and superior anti-interference, and it can simultaneously provide large current, increase the battery life, and improve the technical economy of energy storage. L1 - http://journals.pan.pl/Content/116232/PDF/art_10.pdf L2 - http://journals.pan.pl/Content/116232 PY - 2020 IS - No 2 EP - 388 DO - 10.24425/aee.2020.133032 KW - battery KW - bi-directional DC/DCconverter KW - HESS KW - super-capacitor KW - voltage closed-loop A1 - Zhang, Zhen A1 - Zhang, Baoge A1 - Wang, Donghao A1 - Li, Ping A1 - Rong, Yao PB - Polish Academy of Sciences VL - vol. 69 DA - 2020.05.31 T1 - Battery/super-capacitor HESS applied in DC microgrid SP - 379 UR - http://journals.pan.pl/dlibra/publication/edition/116232 T2 - Archives of Electrical Engineering ER -