A modified current sensorless approach for maximum power point tracking of partially shaded photovoltaic systems

Obeidi, Nabil and Kermadi, Mostefa and Belmadani, Bachir and Allag, Abdelkrim and Achour, Lazhar and Mesbahi, Nadhir and Mekhilef, Saad (2023) A modified current sensorless approach for maximum power point tracking of partially shaded photovoltaic systems. Energy, 263 (A). ISSN 0360-5442, DOI https://doi.org/10.1016/j.energy.2022.125618.

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The present paper proposes a modified current sensorless approach to reduce the implementation cost of maximum power point tracking (MPPT) controller for photovoltaic (PV) systems under partial shading condi-tions (PSCs). The proposed scheme relies only on the input voltage signal without the need for a current sensor to track the global maximum power point (GMPP). This is performed using a predefined objective function derived from the mathematical model of the buck-boost converter with an adaptive step-size mechanism for quick convergence. In addition, a formula of lower and upper limit duty cycle values for every local peak is incor-porated for fast detection of local power peaks. An extensive experimental study, using a hardware prototype composed of a buck-boost converter driven by a dSPACE DS1104, is carried out to validate the proposed control scheme. Experimental results show that the proposed controller is able to accurately track the GMPP with high speed under various PSCs scenarios. Additionally, the proposed scheme reduces the implementation cost by 27.95% compared to conventional MPPT techniques.

Item Type: Article
Funders: Ministry of Education, Malaysia (Grant No: FRGS/1/2020/TK0/UM/02/15)
Uncontrolled Keywords: Global maximum power point (GMPP); Objective function; Modified current sensorless (MCSL); Partially shaded conditions (PSCs); Photovoltaic (PV) system
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms Zaharah Ramly
Date Deposited: 27 Nov 2023 04:43
Last Modified: 27 Nov 2023 04:43
URI: http://eprints.um.edu.my/id/eprint/39402

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