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Energies 2018, 11(2), 469; https://doi.org/10.3390/en11020469

A PSO-Optimized Fuzzy Logic Control-Based Charging Method for Individual Household Battery Storage Systems within a Community

1
Power Electronics Research Center, National Taiwan University of Science and Technology (NTUST), No.43, Sec. 4, Keelung Road, Taipei 106, Taiwan
2
Department of Electrical Engineering, National Taiwan University of Science and Technology (NTUST), No.43, Sec. 4, Keelung Road, Taipei 106, Taiwan
3
Institute for Electrical Energy Storage Technology, Technical University of Munich (TUM), Arcisstr. 21, 80333 Munich, Germany
*
Author to whom correspondence should be addressed.
Received: 24 January 2018 / Revised: 13 February 2018 / Accepted: 16 February 2018 / Published: 23 February 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

Self-consumption of household photovoltaic (PV) storage systems has become profitable for residential owners under the trends of limited feed-in power and decreasing PV feed-in tariffs. For individual PV-storage systems, the challenge mainly lies in managing surplus generation of battery and grid power flow, ideally without relying on error-prone forecasts for both generation and consumption. Considering the large variation in power profiles of different houses in a neighborhood, the strategy is also supposed to be beneficial and applicable for the entire community. In this study, an adaptable battery charging control strategy is designed in order to obtain minimum costs for houses without any meteorological or load forecasts. Based on fuzzy logic control (FLC), battery state-of-charge (SOC) and the variation of SOC (∆SOC) are taken as input variables to dynamically determine output charging power with minimum costs. The proposed FLC-based algorithm benefits from the charging battery as much as possible during the daytime, and meanwhile properly preserves the capacity at midday when there is high possibility of curtailment loss. In addition, due to distinct power profiles in each individual house, input membership functions of FLC are improved by particle swarm optimization (PSO) to achieve better overall performance. A neighborhood with 74 houses in Germany is set up as a scenario for comparison to prior studies. Without forecasts of generation and consumption power, the proposed method leads to minimum costs in 98.6% of houses in the community, and attains the lowest average expenses for a single house each year. View Full-Text
Keywords: PV battery system; battery charging control strategy; fuzzy logic control; particle swarm optimization PV battery system; battery charging control strategy; fuzzy logic control; particle swarm optimization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Cheng, Y.-S.; Liu, Y.-H.; Hesse, H.C.; Naumann, M.; Truong, C.N.; Jossen, A. A PSO-Optimized Fuzzy Logic Control-Based Charging Method for Individual Household Battery Storage Systems within a Community. Energies 2018, 11, 469.

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