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Title: Battery lifetime extension in a stand-alone microgrid with flexible power point tracking of photovoltaic system
Authors: Yan, Hein Wai
Farivar, Glen G.
Beniwal, Neha
Tafti, Hossein Dehghani
Ceballos, Salvador
Pou, Josep
Konstantinou, Georgios
Keywords: Engineering::Electrical and electronic engineering::Power electronics
Engineering::Electrical and electronic engineering::Electric power::Production, transmission and distribution
Issue Date: 2022
Source: Yan, H. W., Farivar, G. G., Beniwal, N., Tafti, H. D., Ceballos, S., Pou, J. & Konstantinou, G. (2022). Battery lifetime extension in a stand-alone microgrid with flexible power point tracking of photovoltaic system. IEEE Journal of Emerging and Selected Topics in Power Electronics.
Project: N62909-19-1-2081 
Journal: IEEE Journal of Emerging and Selected Topics in Power Electronics 
Abstract: In stand-alone dc microgrids, battery energy storage systems (BESSs) are conventionally used for regulating the dc-link voltage, causing a continuous battery operation. Though operating the photovoltaic (PV) system at its maximum power point yields minimum battery discharge current, the opposite is true for battery charging current. Therefore, reducing the battery charging current based on its state-of-charge (SoC) and the amount of available PV surplus power (which can be treated as virtually stored energy) is an opportunity for improving the battery life. The main objective of the control strategy proposed in this paper is to prolong the battery lifetime by reducing the charging current and keeping the battery SoC at lower values if the PV power is enough to supply the loads. Additionally, the PV system is used as the primary asset to regulate the microgrid voltage. The dynamic performance of the proposed control strategy is validated with experimental tests under various operating conditions. Furthermore, its effectiveness in prolonging the battery lifetime is evaluated using an aging model of a Li-ion battery (without loss of generality) by simulated case studies.
ISSN: 2168-6777
DOI: 10.1109/JESTPE.2022.3212702
Rights: © 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at:
Fulltext Permission: open
Fulltext Availability: With Fulltext
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ERI@N Journal Articles

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