An improved maximum power point tracking method for a photovoltaic system |
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| Affiliation: | 1. CERN, Geneva, Switzerland;2. Research Institute for Nuclear Problems, Belarusian State University, Bobruiskaya Str. 11, Minsk, Belarus;3. Semiconductor Physics Department and Institute of Applied Research, Vilnius University, Universiteto Str. 3, Vilnius, Lithuania;4. Institute for Scintillation Materials, Lenin Av. 60, Kharkov, Ukraine;5. Research Institute for Chemical Problems, Belarusian State University, Leningradskaya Str. 14, Minsk, Belarus;1. Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziądzka 5, PL 87-100 Toruń, Poland;2. LUNAM Université, Université d’Angers, CNRS UMR 6200, Laboratoire MOLTECH-Anjou, 2 Bd Lavoisier, 49045 Angers Cedex, France;1. School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;2. Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Dresden 01314, Germany;3. School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China |
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| Abstract: | In this paper, an improved auto-scaling variable step-size Maximum Power Point Tracking (MPPT) method for photovoltaic (PV) system was proposed. To achieve simultaneously a fast dynamic response and stable steady-state power, a first improvement was made on the step-size scaling function of the duty cycle that controls the converter. An algorithm was secondly proposed to address wrong decision that may be made at an abrupt change of the irradiation. The proposed auto-scaling variable step-size approach was compared to some various other approaches from the literature such as: classical fixed step-size, variable step-size and a recent auto-scaling variable step-size maximum power point tracking approaches. The simulation results obtained by MATLAB/SIMULINK were given and discussed for validation. |
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| Keywords: | Maximum Power Point Tracking (MPPT) Auto-variable step-size PV system |
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