Abstract
The performance of the solar photovoltaic system is affected by the unpredictable phenomenon of partial shading. This causes the mismatch losses that suppress the power generation of healthy PV modules in it. The objective of the proposed work in this paper is to bring out the maximum power from each PV module in the PV array by reducing the mismatch losses. A new array configuration method is proposed in this paper, which follows the screw pattern in the row formation. Each PV row is created with distinct PV modules from the rows of the conventional array configuration. This proposed work allows the PV system to operate with minimum mismatch losses by even shade dispersion over the PV array. The proper mathematical expression with all necessary constraints was derived for the array formation of the proposed work. The output analysis is been validated in the simulation of the <inline-formula> <tex-math notation="LaTeX">$9\times 9$ </tex-math></inline-formula> PV array in MATLAB/Simulink Ⓡ. The mismatch loss generation and output power enhancement are measured and compared with the various conventional array configuration methods under six kinds of partial shading patterns. The proposed array configuration is 40% more efficient than the conventional series-parallel array configuration and also performs better than the total cross-tied and sudoku puzzle pattern methods. The shade dispersion rate of the proposed array configuration has highly reduced the mismatch losses in the PV system and hence, it improves the power output.
Highlights
Global development introduces various technologies which reduce human effort
A new array configuration for the solar PV system is proposed based on the pattern that follows the screw structure
Screw propagated array configuration is further classified into two classifications based on the direction of propagation as horizontal propagated screw pattern and vertical propagated array configuration
Summary
Global development introduces various technologies which reduce human effort. Worldwide these technologies raise the energy demands for accessing them. The PV rows are created with the distinct PV modules from each row of conventional TCT configuration which allows the PV array with the maximum shade dispersion rate This enhances the power generation of the PV system. The measuring units find the values of electrical parameters such as current and power and measure the environmental factors such as temperature and irradiation Based on these measurements control units find the level of partial shading affected on the PV system and rearrange the PV modules interconnections by operating the switches. This method highly reduces the effect of partial shading and enhances the power output.
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