Partial shading in a solar array deteriorates the maximum power generated owing to the voltage mismatch and current mismatch of the shaded solar PV module. Also, partial shading primes to multiple peaks in the P-V characteristics of the solar PV array and it has become more complex to track the Maximum Power Point (MPP). To enhance the maximum power generated by means of reducing mismatch losses, several reconfiguration techniques were suggested earlier. The mismatch losses depend not only on the amount of the area shaded but also on the shading pattern and array arrangement. This paper proposes a new pattern of positioning the PV module using the Latin square pattern without changing the total cross tied electrical connection. The proposed pattern disperses the shading uniformly within the given PV array which reduces mismatch losses significantly and increases the generation of power. The shade dispersion using proposed pattern also eliminates multiple peaks in its PV curve which enables the use of a simple algorithm to track MPP. This Latin square pattern is studied under different partial shading conditions, and the results exhibit improved performance under partial shading conditions.

This study presents the new interconnection scheme for solar photovoltaic (PV) modules to mitigate the power mismatch and wiring line losses employing improvised magic technique (IMT). The proposed interconnection scheme provides improved power enhancement compared to conventional total cross tied (TCT) technique. This technique can be implemented on PV array of any order with 'x' rows (x > 2) and 'y' columns (y > 2). However, in the higher order PV modules, power mismatch loss and wiring loss reduced significantly using segmented improvised magic technique (SIMT). The sequence of reconfiguring the PV modules has been explained using a flowchart and an algorithm both for IMT and SIMT. The effectiveness of these techniques is tested using MATLAB simulations and validated the analysis by comparing the performances with the existing TCT for lower order (3 × 3) with experimentation and higher order (9 × 9) PV modules. Thus, the proposed IMT and SIMT techniques provide the maximum power enhancement, less power mismatch and line loss, and maximum improved efficiency in real-time PV array installations.

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