Optimal Su-Do-Ku based interconnection scheme for increased power output from PV array under partial shading conditions

Abstract

Partial shading is a common phenomenon in PV arrays. They drastically reduce the power output because of mismatch losses, which are reliant on the shape of the shade as well as the locations of shaded panels in the array. The power output can be improved by distributing the shade over various rows to maximize the current entering the node. A Su-Do-Ku configuration can be used to rearrange the physical locations of the PV modules in a total cross tied PV array with the electrical connections left unchanged. However, this arrangement increases the length of the wire required to interconnect the panels thus increasing the line losses. In this paper, an improved Su-Do-Ku arrangement that reduces the length of the wire required for the connection is proposed. The system is designed and simulated in a Matlab/Simulink environment for various shading patterns and the efficacies of various arrangements are compared. The results prove that the power output is higher in the proposed improved Su-DoKu reconfiguration technique compared to the earlier proposed Su-Do-Ku technique.

Review of Different Solar Photovoltaic Array Configurations for Minimization of Power Loss Under Partial Shading Conditions

“…In dynamic reconfiguration physical location of the panel remains the same but electrical connection are changed. In static reconfiguration technique, physical location of the PV modules in TCT configuration are changed within array on the basis of mathematical puzzle like Sudoku [28], [29], optimal sudoku [30], [31], magic square puzzle [32], dominance square [33], skyscraper puzzle [34]. Tatabhatla et al, 2019, reconfigured the conventional TCT array used arrow sudoku puzzle pattern which a variant of original sudoku puzzle.…”

Investigation of single and multiple MPPT structures of solar PV-system under partial shading conditions considering direct duty-cycle controller

“…In ref. 30 , 31 , the Su Do Ku approach has a wide variety of physical PV array reconfigurations. However, it still has a slight drawback that the first column's value is constant, thus submatrix formation and execution consume long time.…”

Behavior of bifacial and monofacial photovoltaic modules under partial shading scenarios

“…Over the years, several researchers have extensively covered the different methods of array reconfigurations, both physical array reconfiguration (PAR) and electrical array reconfiguration (EAR). Various techniques for PAR such as Sudoku, 17 optimal Sudoku, 18,19 Futoshiki puzzle, 20 Magic Square, 15,21 Dominance square, 22 Latin Square, 23 Odd‐even configuration, 24 Baker map technique, 25 Skyscraper puzzle‐based configuration 26 and Lo Shu technique 27 have been proposed in literature in the past decade. These techniques are derived from specific puzzles or adequate positioning algorithms.…”