Optimization of a Hybrid Energy System for an Isolated Community in Brazil

Tiago Targino Sepulveda, Luciana Martinez


Undeniably the basic needs of a man are numerous. A traditional list includes food, shelter and clothing. However, for a contemporary man, the lack of access to electricity is strongly connected to the social exclusion. In Brazil, isolate villages is still a reality because the costs to expand the national grid can be unattractive. An alternative solution is to design an off-grid power system, normally using a diesel generator. This paper investigates the costs of a micro-grid developed for an isolate community located in amazon region. Their costs can be minimized if the best combination of hybrid energy systems is applied. The micro-grid has been optimized using HOMER (Hybrid Optimization Model for Electric Renewables) software. Results show the Cost of Energy (COE) for different demands and the costs associated to operation. Considering the daily radiation and average wind speed of the site, it was found the substitution of wind turbines by adding more photovoltaic panels with a diesel generator and batteries. Annual dispends can be reduced 54% when the optimal configuration is applied.


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Optimization, Renewable Resources; Hybrid System; Isolated System; HOMER

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