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Energy Conversion and Management
Elsevier
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Abstract: |
Partial shading on photovoltaic (PV) modules significantly affects their productivity. Therefore, different PV
reconfiguration approaches were employed as solutions for distributing the shade across the array. This
paper proposes an advanced four-square (FS) sudoku technique for configuring the 9 × 9 total-cross-tied
(TCT) PV array via moving the modules physically for one time to enhance the harvested maximum power
under all possible shading patterns. The proposed FS is validated under different shading classes, including
deterministic and random shading patterns. The performance of the proposed strategy is assessed versus
six different approaches representing the literature, including basic sudoku (SDU), optimal sudoku (OSDU),
chaos map (CMP), skyscraper (Sky-S), odd-even prime (OEP), and ancient chinese magic square (ACMS). The
assessment process is conducted using the global maximum power point, execution ratio (ER), fill factor
(FF), percentage power losses (%𝑃𝐿), power enhancement (%𝑃𝐻), and array output power-voltage (P-V)
characteristic. Moreover, an extensive analysis of the cost and the energy saving during a day is performed
to investigate the reliability of the proposed FS strategy. Furthermore, a critical evaluation is performed
among the FS and recent dynamic reconfiguration approaches, including particle swarm optimizer (PSO),
harris hawk optimization algorithm (HHO), genetic algorithm (GA), butterfly optimization algorithm (BOA),
coyote optimization algorithm (COA) and artificial ecosystem-based optimization (AEO). The results of this
paper reveal that the rearranged scheme-based FS approach can disperse different categories of shading
efficiently with a high generated energy from the entire system and high revenue compared to TCT and other
state-of-the-art arrangements with achieving smooth uni-peak P-V characteristics.
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