Abstract
Compelled by environmental and economic reasons and facilitated by modern technological advancements, the share of hybrid energy systems (HES) is increasing at modern smart house (SH) level. This work proposes an intelligent hybrid energy management system (IHEMS) for an SH connected to a power network that allows a bidirectional power flow. The SH has electrical and thermal power loops, and its main components include renewable energy from wind and photovoltaics, electric vehicle (EV), battery energy storage system, a fuel cell which serves as a micro-combined heat and power system, and a boiler. The proposed IHEMS models the components of the SH, defines their constraints, and develops an optimization model based on the real coded genetic algorithm. The key features of the developed IHEMS are highlighted under six simulation cases considering different configurations of the SH components. Moreover, the standard EV charging techniques are compared, and it is observed that the charging method which is flexible in timing and power injection to the EV is best suited for the economic operation of the SH. The simulation results reveal that the proposed IHEMS minimizes the 24-hour operational cost of the SH by optimally scheduling the energy resources and loads.
Highlights
The electric power can be purchased from and sold to the utility and the auxiliary boiler is available for thermal power requirements
A modern utility grid which allows a bidirectional power flow was considered where the customer can sell their surplus energy to the utility
A comparison of costs and savings of smart house (SH) devices was summarized to show the features of the developed model
Summary
The contribution of hybrid energy systems (HES) is increasing in the world at industrial, commercial, and domestic levels to address environmental and economic concerns [1]. A HES consists of two or more energy resources operated together to obtain an improved efficiency and a better energy balance. Compact and high-efficiency micro-combined heat and power systems (micro-CHP) are gaining popularity at domestic level [2,3,4,5,6,7]. Council for an Energy-Efficient Economy’s report, the modern CHP systems can work at an efficiency.
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