Optimal Su-Do-Ku based interconnection scheme for increased power output from PV array under partial shading conditions
Received date: 22 May 2014
Accepted date: 20 Aug 2014
Published date: 29 May 2015
Copyright
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-Do-Ku reconfiguration technique compared to the earlier proposed Su-Do-Ku technique.
P. SRINIVASA RAO , P. DINESH , G. SARAVANA ILANGO , C. NAGAMANI . Optimal Su-Do-Ku based interconnection scheme for increased power output from PV array under partial shading conditions[J]. Frontiers in Energy, 2015 , 9(2) : 199 -210 . DOI: 10.1007/s11708-015-0350-1
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