RT Journal Article
T1 Minimizing Energy Storage Utilization in a Stand-Alone DC Microgrid Using Photovoltaic Flexible Power Control
A1 Yan, Hein Wai
A1 Narang, Aditi
A1 Tafti, Hossein Dehghani
A1 Farivar, Glen G.
A1 Ceballos, Salvador
A1 Pou, Josep
AB DC microgrids (dcMGs) are gaining popularity for photovoltaic (PV) applications as the demand for PV generation continues to grow exponentially. A hybrid control strategy for a PV and battery energy storage system (BESS) in a stand-alone dcMG is proposed in this paper. In contrast to the conventional control strategies that regulate the dc-link voltage only with the BESS, the proposed control strategy exploits both the PV system and the BESS to regulate the dc-link voltage. The PV acts as the primary dc voltage regulator allowing for the battery to remain standby as a secondary dc voltage regulating resource. As a result, the proposed control strategy minimizes the utilization of the BESS in order to prolong its lifetime while maintaining the state-of-charge (SoC) of the battery within a desired range. To achieve that, the flexible power point tracking (FPPT) concept is applied to the PV system to enhance the dynamic performance of the dcMG by adaptively adjusting the PV output power according to the load profile. The performance of the proposed control strategy is verified with experimental results. Furthermore, the effectiveness of the proposed control strategy on prolonging the lifetime of a lithium-ion battery and a lead-acid battery is investigated via a simulation case study with one-day load and irradiance curve profiles.
SN 1949-3053
YR 2021
FD 2021-09
LK https://hdl.handle.net/11556/3329
UL https://hdl.handle.net/11556/3329
LA eng
NO Yan , H W , Narang , A , Tafti , H D , Farivar , G G , Ceballos , S & Pou , J 2021 , ' Minimizing Energy Storage Utilization in a Stand-Alone DC Microgrid Using Photovoltaic Flexible Power Control ' , IEEE Transactions on Smart Grid , vol. 12 , no. 5 , 9405349 , pp. 3755-3764 . https://doi.org/10.1109/TSG.2021.3073370
NO Publisher Copyright: © 2010-2012 IEEE.
NO Manuscript received April 20, 2020; revised August 31, 2020, December 15, 2020, and March 1, 2021; accepted April 10, 2021. Date of publication April 15, 2021; date of current version August 23, 2021. This work was supported in part by the Singapore Ministry of Education Academic Research Fund Tier 1 under Grant 2019-T1-001-168 (RG80/19), and in part by the Basque Country Government through the Project ENSOL2 under Grant KK-2020/00077 (Development of Advanced PV Technologies). Paper no. TSG-00592-2020. (Corresponding author: Hein Wai Yan.) Hein Wai Yan, Aditi Narang, and Josep Pou are with the School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798 (e-mail: heinwaiy001@e.ntu.edu.sg; aditi021@e.ntu.edu.sg; josep.pou@ieee.org).
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RD 28 jul 2024