Full Current-Type Control-Based Hybrid Energy Storage System

• Published in: Energies (Basel) Vol. 15; no. 8; p. 2910
• Main Authors: Ren, Jiahui, Lin, Wenli, Liu, Xinbo, He, Shuiyuan, Dongye, Zhonghao, Diao, Lijun
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-04-2022
• Subjects: Accuracy; Batteries; bidirectional buck–boost converter; Control algorithms; Control systems; Control systems design; Control theory; Converters; Design; Dynamic response; Efficiency; Electric power distribution; Electrical loads; Energy management; Energy storage; Energy utilization; hybrid energy storage system; Li-ion battery; Load; Load distribution; Optimization algorithms; Power management; Power sources; pulsed load; supercapacitor; Supercapacitors
• ISSN: 1996-1073; 1996-1073
• DOI: 10.3390/en15082910

With greater power density, a hybrid power source that combines supercapacitors and batteries has a wide range of applications in pulse-operated power systems. In this paper, a supercapacitor/battery semi-active hybrid energy storage system (HESS) with a full current-type control strategy is presented. The studied HESS is composed of batteries, supercapacitors, and a bidirectional buck–boost converter. The converter is controlled such that supercapacitors supply load power pulses, and batteries provide the power in steady state. To realize the fast compensation of the supercapacitors to the load power pulses, a power distribution module based on hysteresis control theory is designed in the control system. Moreover, the control strategy does not require the model parameters of the converter and supercapacitors, so the control system is simplified. A complete configuration scheme and cost analysis of the proposed HESS are also presented. Obtained results show that the proposed supercapacitor/battery semi-active HESS has good performance in terms of dynamic response, weight, and energy utilization coefficient (EUC).