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DC-link voltage optimization for SOC balancing control of a battery energy storage system based on a 7-level cascaded PWM converter

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3 Author(s)
Peerapon Chanhom ; Kasetsart Applied Power Electronics Lab, Department of Electrical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand ; Siriroj Sirisukprasert ; Natchpong Hatti

This paper proposes a new DC-link voltage optimization method for SOC balancing control of a battery energy storage system based on a 7-level cascaded PWM converter. Factors used for minimizing an exceeding utilization of DC-link voltage by rated power operating during SOC balancing are analyzed and presented. The proposed individual SOC balancing control and leveled SOC balancing control are developed. To verify the effectiveness of the proposed method, the mathematical model of the battery energy storage system has been developed and simulated. The major simulation results have consistently indicated the validity and effectiveness of the proposed method.

Published in:

Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2012 9th International Conference on

Date of Conference:

16-18 May 2012