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Sustainability 2017, 9(1), 117;

Multi-Objective Optimization for Equipment Capacity in Off-Grid Smart House

Faculty of Engineering, University of the Ryukyus, 1 Senbaru Nishihara-cho Nakagami, Okinawa 903-0213, Japan
Department of Electrical Engineering, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki Noda, Chiba 278-8510, Japan
Hawaii Natural Energy Institute, University of Hawaii, Manoa Honolulu, HI 96822, USA
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Franco
Received: 16 August 2016 / Revised: 7 January 2017 / Accepted: 9 January 2017 / Published: 13 January 2017
(This article belongs to the Special Issue Sustainable Electric Power Systems Research)
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Recently, the off-grid smart house has been attracting attention in Japan for considering global warming. Moreover, the selling price of surplus power from the renewable energy system by Feed-In Tariff (FIT) has declined. Therefore, this paper proposes an off-grid smart house with the introduced Photovoltaic (PV) system, Solar Collector (SC) system, Hot Water Heat Pump (HWHP), fixed battery and Electric Vehicle (EV). In this research, a multi-objective optimization problem is considered to minimize the introduced capacity and shortage of the power supply in the smart house. It can perform the electric power procurement from the EV charging station for the compensation of a shortage of power supply. From the simulation results, it is shown that the shortage of the power supply can be reduced by the compensation of the EV power. Furthermore, considering the uncertainty for PV output power, reliable simulation results can be obtained. View Full-Text
Keywords: off-grid smart house; fixed battery capacity; electric vehicle; NSGA2 off-grid smart house; fixed battery capacity; electric vehicle; NSGA2

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Miyazato, Y.; Tobaru, S.; Uchida, K.; Celestino Muarapaz, C.; Motin Howlader, A.; Senjyu, T. Multi-Objective Optimization for Equipment Capacity in Off-Grid Smart House. Sustainability 2017, 9, 117.

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