Reliability Enhancement of Photovoltaic Systems under Partial Shading through a Two-Step Module Placement Approach

Belqasem Aljafari, Priya Ranjan Satpathy, Siva Rama Krishna Madeti, Pradeep Vishnuram () and Sudhakar Babu Thanikanti ()
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Belqasem Aljafari: Department of Electrical Engineering, College of Engineering, Najran University, Najran 11001, Saudi Arabia
Priya Ranjan Satpathy: Department of Electrical and Electronics Engineering, Chaitanya Bharathi Institute of Technology, Hyderabad 500075, India
Siva Rama Krishna Madeti: Department of Electrical and Electronics Engineering, SRKR Engineering College, Bhimavaram 534204, India
Pradeep Vishnuram: Department of Electrical and Electronics Engineering, SRM Institute of Science and Technology, Chennai 603203, India
Sudhakar Babu Thanikanti: Department of Electrical and Electronics Engineering, Chaitanya Bharathi Institute of Technology, Hyderabad 500075, India

Energies, 2022, vol. 15, issue 20, 1-27

Abstract: Partial shading has a negative impact on photovoltaic systems by forcing the connected modules to generate lower power, creating severe unexpected power losses. To resolve this issue, numerous solutions have been proposed, among which configuration modification has recently attracted a greater audience. The preliminary approach to module reconfiguration was based on the alteration of electrical connections through switches, which introduces lag due to the large number of switches and sensors, complex algorithms, and impractical application. Hence, static techniques are considered to be a cost-effective, low-complexity and easy-to-adopt solution for efficiently reducing the losses due to shading. Hence, this paper proposes a two-step module replacement approach that is validated under multiple partial shading conditions, and the performance is compared with various conventional and hybrid configurations and a static electrical reconfiguration technique using mathematical analysis, comparative parameters and power curves analysis. The validation was performed using the MATLAB platform for two system sizes—6 × 6 and 18 × 3—proving its applicability for arbitrary system sizes. On the basis of the depth investigation, an average power increase of 17.49%, 14.47%, and 14.12% for the two-step approach compared to the conventional, hybrid and electrical reconfiguration was observed in the partial shading cases considered.

Keywords: efficiency; maximum power point; partial shading; power loss; reconfiguration; solar photovoltaic (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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