Optimal hybrid system design based on renewable energy resources

Recently, AC/DC hybrid energy systems are getting more popular as subsystyems of distribution grids, due to their reliability and low energy costs. In this paper, hybrid system design (HSD) approach with the consideration of renewable energy resources for a house in Kermanshah province, Iran, is proposed. The energy resources considered in the design procedure include wind turbines, solar cells, eletrolyzer/fuel cell, and battery. The design problem boils down to a twofold optimization problem: net present cost (NPC) optimization and operation cost (OC) optimization. The mathematical model of the hybrid system components includes both component size and cost, which is implemented using HOMER software. In the simulation section, the results are presented for three designs, and based on load supply satisfaction and optimization cost values, the best design is introduced.