Análise do comportamento de sistemas fotovoltaicos multistring com sombreamento parcial

Abstract

The work in question is the analysis of the behavior of photovoltaic systems, having the intention to understand the consequences caused by the effects of partial shading through the simulation of multistring I-V curves, and consequent understanding of the inflection voltages and the operation of the bypass diodes in photovoltaic modules. The importance of the work consists in the search for a better understanding of a problem that is very recurrent in photovoltaic systems, assisting in the application of existing techniques for maximum power tracking (MPPT), which contribute to obtaining the maximum possible efficiency for the generation of solar energy, besides the growing search for solutions that do not cause damage to the environment, which is properly applied to the subject treated. During its development, the computer software Excel, MATLAB and Simulink are used to demonstrate the results obtained in the simulation of an arrangement with four photovoltaic modules, through curves relating current x voltage (I-V) and power x voltage (P-V), where the simulated cases are presented at different levels of solar irradiance for the photovoltaic modules analyzed, aiming to define a standard for knowledge of when each peak of maximum power occurs for the multistring P-V curves, and how the partial shading influences their behaviors.