A Simple Mismatch Mitigating Partial Power Processing Converter for Solar PV Modules

Kamran Ali Khan Niazi, Yongheng Yang, Tamas Kerekes and Dezso Sera
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Kamran Ali Khan Niazi: Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
Yongheng Yang: Department of Electrical Engineering, Zhejiang University, Hangzhou 310058, China
Tamas Kerekes: Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
Dezso Sera: School of Electrical Engineering & Robotics, Queensland University of Technology, Brisbane, QLD 4000, Australia

Energies, 2021, vol. 14, issue 8, 1-18

Abstract: Partial shading affects the energy harvested from photovoltaic ( PV ) modules, leading to a mismatch in PV systems and causing energy losses. For this purpose, differential power processing ( DPP ) converters are the emerging power electronic-based topologies used to address the mismatch issues. Normally, PV modules are connected in series and DPP converters are used to extract the power from these PV modules by only processing the fraction of power called mismatched power. In this work, a switched-capacitor-inductor ( SCL )-based DPP converter is presented, which mitigates the non-ideal conditions in solar PV systems. A proposed SCL -based DPP technique utilizes a simple control strategy to extract the maximum power from the partially shaded PV modules by only processing a fraction of the power. Furthermore, an operational principle and loss analysis for the proposed converter is presented. The proposed topology is examined and compared with the traditional bypass diode technique through simulations and experimental tests. The efficiency of the proposed DPP is validated by the experiment and simulation. The results demonstrate the performance in terms of higher energy yield without bypassing the low-producing PV module by using a simple control. The results indicate that achieved efficiency is higher than 98% under severe mismatch (higher than 50%).

Keywords: partial shading; photovoltaic ( PV ) modules; differential power processing ( DPP ); switched-capacitor-inductor ( SCL ); traditional bypass diode (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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