A constrained inter-submodule state-of-charge balancing method for battery energy storage systems based on the cascaded H-bridge converter

• المؤلفون الرئيسيون: Liang, Gaowen, Rodriguez, Ezequiel, Farivar, Glen G., Ceballos, Salvador, Townsend, Christopher D., Gorla, Naga Brahmendra Yadav, Pou, Josep
• مؤلفون آخرون: School of Electrical and Electronic Engineering
• التنسيق: مقال
• اللغة: English
• منشور في: 2022
• الموضوعات: Engineering::Electrical and electronic engineering::Power electronics; State of Charge Balancing; Batteries
• الوصول للمادة أونلاين: https://hdl.handle.net/10356/156963

In the operation of battery energy storage systems (BESSs) based on the cascaded H-bridge (CHB) converters, it is desirable to balance the state of charge (SoC) among the submodules (SMs) within each phase arm. However, there are constraints on the active power distribution among the SMs that intends to balance the SoC. For instance, each SM in a practical system is designed with a specific power rating and can be damaged if it is exceeded. Therefore, a novel rule-based method is proposed in this paper to achieve a fast SoC balancing while respecting the power constraints of the SMs. The proposed method is general and readily applicable to hybrid BESSs, where the SMs are integrated with heterogeneous energy storage. Experimental results are obtained to verify the effectiveness of the proposed algorithm and to compare its performance with respect to existing methods.