MPPT method for PV modules using current control-based partial shading detection

Abstract

Partial shading conditions are the serious problems in solar modules making them to work under low efficiency when compared with steady state conditions. The required power from the Photovoltaics (PV) is achieved by combining the PV modules in the combination of series and parallel arrangements depending upon the specifications of the converter. Generally single-stage conversion is realized by connecting modules in series to built a high voltage greater than the line voltage of the grid. But highly parallel connected modules shows better performance in the output power when compared with the highly series connected modules during rapid change in partial shading conditions. A Maximum Power Point Tracking (MPPT) method with an ability of detecting the partial shading occurrence on PV array, and employs a current control method for tracking the global maximum between the local maximums.