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http://dx.doi.org/10.6113/TKPE.2022.27.1.63

Irradiation-Adaptive Operating Algorithm of Differential Power Processing Module for Photovoltaic Panels Including Multiple Strings  

Kim, Geun-Wook (School of Electrical & Computer Engineering, UNIST)
Kim, Mina (School of Electrical & Computer Engineering, UNIST)
Jung, Jee-Hoon (School of Electrical & Computer Engineering, UNIST)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.27, no.1, 2022 , pp. 63-73 More about this Journal
Abstract
The differential power processor (DPP) system is used to prevent a decrease in the total power generation due to the partial shading of photovoltaic modules. Compared with traditional series strings and full power processing (FPP) converter solutions, the DPP converter system shows advantages in terms of modularization process, volume, and transformation losses. However, the system has a limitation in that the power generation process of differential power processors produces lower power under certain irradiation conditions. This paper proposes a structure and operating algorithm for differential power processing modules that can use a single power converter for multiple strings. The operational algorithm for the differential power regulators allows the maximum power generation to be maintained in comparison with conventional series-connected and differential power processing methods even under various partial shading conditions. The operation algorithm of the proposed DPP is verified by Matlab/Simulink simulations.
Keywords
Irradiation adaptive algorithm; Differential power processing; Photovoltaic; Bi-directional DC-DC converter; Partial shading;
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