Estudo sobre sombreamento em planta fotovoltaica localizada em zona urbana de Fortaleza-CE

Abstract

The present work is a study on the shading of a photovoltaic (PV) plant, located in the urban zone, connected to the electricity grid of the UFC's Alternative Energy Laboratory (LEA), Campus do Pici, in Fortaleza-CE. For an analysis the different norms of normalization and dynamics were generated, so that the simulated actions are not idealized in the PV plant. The static shading consists of shadows projected on the modules that do not differentiate over time, in contrast, for the dynamic case, a variation of the shadow occurs over time. Before each experiment was done in order to obtain the best results for the study. To compare the performance variables of the crop, the days were marked as days of life during the period in which the experiment was performed. The capacity factor (CF) was calculated for the four auditory experiments, divided in two stages of static shading and two of dynamic shading. As a result, a reduction of 2.35% and 1.17% was obtained for the first case and 0.84% and 1.72% for the second. Observe the performance of power and irradiance curves, as well as verify that low irradiance (below 500 W/m2) or light did not interfere with the generated power. The importance of by-pass diodes and their performance in avoiding the pressures to behave as a load was made explicit. Thus, this study had contributions to the development of a new generation of PV in relation to reality, with great variability of physical parameters, such as irradiance, temperature, humidity, climate, among others.