Conexão de conversores CC-CC em série para redução do efeito de sombreamento em arranjos fotovoltaicos

Abstract

This paper presents a control strategy to supervise the DC-DC converter behavior in serial topology in order to optimize the extraction of photovoltaic power generators independent of climatic variations. The proposed system consists of three independent PV arrays each connected to boost DC-DC converters in series to reduce the effect of shadows caused by atmospheric changes. The maximum use of the power available from PV array is achieved through maximum power tracking techniques (MPPT - Maximum Power Point Tracking). However, in a significant imbalance of radiation present in arrangements, there may be a violation of allowable stress in one of the DC-DC converters addressed topology. Thus, there is a need for control strategy to detect and define the restrictions and ensure maximum extraction power available by the photovoltaic arrays. The project is performed in MATLAB® and PSIM® software in order to verify and validate the proposed control and the DC-DC converter topology in series.