Enhancing Output Power Of Pv Array Operating Under Non-Uniform Conditions

Current in series connected photovoltaic modules receiving different irradiance is limited by the module that receives the least irradiance. This reduces output power of PV array operating under partially shaded conditions as the module that receives higher irradiance do not operate at their maximum power point. Current compensation can be applied to all the modules to match the current of modules receiving different irradiance. With an aim to reduce the number of power converters required for current compensation, the paper presents an algorithm of current compensation for the Total- Cross-Tied ( TCT) configuration. The algorithm is simple to implement and requires less sensors. Simulation results obtained in MATLAB/Simulink are included to demonstrate the effectiveness of the proposed approach.