Photovoltaic solar energy presents considerable growth within the Brazilian energy matrix, pointed as one of the most viable complementary renewable sources in the hydroelectric power plants independence development, resulting in a relief in the Brazilian electrical system, based on water resource availability. In this sense, it is defined strategies in order to diversify the supply sources, such as floating photovoltaic systems use in reservoirs of hydroelectric power plants, thus, the panels implantation on useful lands is avoided. Floating systems presents several advantages compared to land-based power plants, highlighting, greater generation efficiency due to lower rates of heat loss, when installed in reservoirs formed by hydroelectric dams, benefit from transmission systems and existing power generation structure, causing a significant decrease in water evaporation rates of the reservoir, as well. This paper goal is to analyze the implantation feasibility of a floating photovoltaic system in Luís Eduardo Magalhães Hydroelectric Power Plant reservoir in the state of Tocantins, since it has elevated solar irradiation rates and also, the possibility of flooded area utilization. Once it is defined the installation limiters, the system is measured and, counting on software assistance, the productivity of the proposed system is simulated. Amongst the main results, can be highlighted an annual generation of 747,164 kWh for the 500 kWp system which, summed up to a brief return time of the estimated investment, it indicates the photovoltaic and hydroelectric interaction viability.
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