Abstract
DC Nano-grids are increasingly employed in rural areas to create net zero energy homes. This paper evolves a simple approach for commoners and a rigorous analytical approach for experts, for designing a DC Nano-grid. The first method directly obtains the size of the PV panels based on highest monthly average consumption in a year, irradiation and ambient temperature. The second method uses particle swarm optimization (PSO) technique and it is based on a detailed cost equation with all design variables. In both the methods, sizing of PV array is attempted after an appropriate time shifting of loads. It has been established that such alteration of the time of consumption brings down the cost of storage system. The complete procedure for the optimal sizing of DC Nano-grid system by both the methods has been demonstrated for a locality in India. It has been established that sizing of the PV array using intuitive method is adequate for designing a DC Nano-grid in a rural area.
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