Coordinated Control of a Hybrid Energy Storage System for Improving the Capability of Frequency Regulation and State-of-Charge Management

Thien-An Nguyen-Huu, Nguyen Van Thang, Kyeon Hur and Jae Woong Shim
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Thien-An Nguyen-Huu: Department of Energy System Engineering, Inje University, Gimhae 50834, Korea
Nguyen Van Thang: Department of Energy System Engineering, Inje University, Gimhae 50834, Korea
Kyeon Hur: School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Korea
Jae Woong Shim: Department of Energy System Engineering, Inje University, Gimhae 50834, Korea

Energies, 2020, vol. 13, issue 23, 1-21

Abstract: The paper proposes a coordinated operation method of two independent storages for managing state-of-charge (SOC) and for providing ancillary service concerning frequency regulation (FR); furthermore, this article also introduces the power allocation scheme between two storages in consideration of the coverage of the frequency band for each storage along with the SOC management scheme of the supercapacitor and battery. We also provide a guideline for the storage sizing on the basis of the smoothing time constant. Additionally, we verify the advantage of the HESS in extending the lifetime of the battery, which is estimated by a real-time state-of-health (SOH) calculation method. The Bode plot of the proposed method is analyzed to observe the power spectrum coverage in the frequency domain through the case studies using PSCAD/EMTDC and MATLAB.

Keywords: hybrid energy storage system; state-of-health; frequency regulation; droop control; SOC feedback; battery life; supercapacitor; renewable energy sources (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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