An improved Alternate-Odd-Even (AOE) reconfiguration technique for performance enhancement of SPV arrays

Abstract

The paper deals with an Alternate-Odd-Even (AOE) static reconfiguration technique for the power enhancement and performance improvement of the solar photovoltaic (SPV) array under partial shading conditions (PSC). The modules of the chosen 4×4 SPV array are connected electrically in a total-cross-tied (TCT) but repositioned in the SPV array using the proposed AOE reconfiguration technique. The proposed scheme is analyzed and compared with the primary 4×4 SPV array topologies, namely the total-cross-tied (TCT), honeycomb (HC), bridge-link (BL), and series-parallel (SP) for the performance analysis. This technique leads to the redistribution of shade throughout the SPV array. Due to the lower current and voltage outputs, the simple series and parallel configurations have not been considered for this analysis. The proposed technique gives an enhanced performance of the SPV array in terms of higher peak power, lower losses due to shading, improved fill factor and execution ratio, and smooth output characteristics. The proposed technique allows the researchers to design a less complex controller for tracking peak power for the SPV array under PSCs.