Abstract
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.
Highlights
In recent years, as an alternative resource to replace fossil fuels, the development and spread of renewable energy have been deployed to suppress the temperature rise due to global warming [1]
If shortage of the power supply occurs during no connection of the Electric Vehicle (EV) with the house, the amount of shortage energy is supplied to the fixed battery from EV at 8:00 a.m
It is considered that collecting heat by Solar Collector (SC) and PV output power is large, since the solar radiation and temperature are high in summer
Summary
As an alternative resource to replace fossil fuels, the development and spread of renewable energy have been deployed to suppress the temperature rise due to global warming [1]. There is very little research on the optimization of introduced capacity in an off-grid house, and multi-objective optimization for considering the procurement capability of energy by residents has not been studied yet [3]. In this research, the proposed smart house is required to solve a multi-objective optimization problem to minimize the amount of energy procurement from the EV and the capacity of PV and the fixed battery [11,12]. The amount of energy procurement is equal to the shortage of power in the off-grid smart house, and it is the difference between the PV cost and the fixed battery cost per one unit. In this research, the problem addressed is to minimize the Rate of Supply Power Shortage(RSPS) and equipment costs of PV and the fixed battery in the smart house.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
