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International Journal of Electrical and Computer Engineering Systems, Vol. 16 No. 9, 2025.

Original scientific paper

https://doi.org/10.32985/ijeces.16.9.3

Optimal Power Control Using Modified Perturb and Observe Algorithm for Photovoltaic System Under Partial Shading

Afrilia Surya Andini orcid id orcid.org/0009-0003-8707-866X ; State Polytechnic of Malang, Department of Electrical Engineering Jl. Soekarno Hatta No. 9, Malang, Indonesia *
Ratna Ika Putri ; State Polytechnic of Malang, Department of Electrical Engineering Jl. Soekarno Hatta No. 9, Malang, Indonesia
Ika Noer Syamsiana ; State Polytechnic of Malang, Department of Electrical Engineering, Jl. Soekarno Hatta No. 9, Malang, Indonesia
Gery Prasetya ; State Polytechnic of Malang, Department of Electrical Engineering, Jl. Soekarno Hatta No. 9, Malang, Indonesia
Achsanul Khabib ; State Polytechnic of Malang, Department of Electrical Engineering, Jl. Soekarno Hatta No. 9, Malang, Indonesia

* Corresponding author.

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Abstract

Implementation of photovoltaic systems encounters problems, particularly concerning Partial Shading Conditions (PSC), solar irradiance, and temperature, which influence the generated output power. The PSC can diminish the power efficiency of the photovoltaic system. Consequently, a controller is required to optimize the photovoltaic system’s power output by considering the power supply characteristics. This paper discusses optimal power control in photovoltaic system under PSC. The proposed method employs a Modified Perturb and Observe (MP&O) algorithm based on the observation of current and voltage output from the photovoltaic system. The MP&O algorithm is integrated into a microcontroller and will provide PWM signals to operate the synchronous buck converter. Testing was performed under PSC. The experimental results indicated that the synchronous buck converter achieved a performance efficiency of 85%. The efficacy of the MP&O algorithm was evaluated without the MPPT method and conventional P&O algorithm. The MP&O algorithm outperformed compared to without MPPT method and conventional P&O algorithm. The MP&O algorithm yielded more consistent output power and necessitated a quicker tracking duration. The proposed method achieves an average output power efficiency of 84%; in contrast, without the MPPT method, it only reached 57%, and with the conventional P&O algorithm, it attains an efficiency of just 70%.

Keywords

photovoltaic; optimal control; perturb and observe; partial shading;

Hrčak ID:

336408

URI

https://hrcak.srce.hr/336408

Publication date:

10.10.2025.

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