Title: Maximum power harvesting from a PV system using an improved two-stage MPPT scheme based on incremental conductance algorithm and integral controller
Authors: Mostufa Atia; Noureddine Bouarroudj; Aimad Ahriche; Abdelhamid Djari; Yehya Houam
Addresses: Laboratoire Énergétique Mécanique et Ingénieries, Faculté de Technologie, Université M'Hamed Boguera, Avenue de l'Indépendance, 3500, Boumerdes, Algeria ' Unité de Recherche Appliquée en Energies Renouvelable (URAER), Center de Développement des Énergies Renouvelable (CDER), 47133, Ghardaia, Algeria ' Department of Automation, Faculty of Hydrocarbons and Chemistry, University of Boumerdes, Boumerdes, Algeria ' Department of Electrical Engineering, Faculty of Sciences and Technology, Larbi Tebessi University, Tebessa, Algeria ' Unité de Recherche Appliquée en Energies Renouvelable (URAER), Center de Développement des Énergies Renouvelable (CDER), 47133, Ghardaia, Algeria
Abstract: This article deals with a novel strategy called two-stage incremental conductance (INC) algorithm for maximum power point tracking (MPPT) for photovoltaic (PV) systems. This method is proposed to tackle the shortcomings of classical incremental conductance (INC) method such as oscillations, imperfect MPPT, slow tracking of MPP, etc. These demerits stem from the use of a one-stage INC algorithm with a fixed duty cycle step size, which cannot provide the optimal duty cycle especially under changing weather conditions (temperature and irradiance) and resistive load. The first stage of the proposed approach is used for providing the reference voltage using the INC algorithm; and the second one is an integrator controller tuned by Routh's criterion used to ensure the stability of the voltage closed loop control. Simulation and numerical results in different cases confirm the superiority of the proposed two-stage INC algorithm over the classical one based on one stage, with an efficiency of more than 93.75%.
Keywords: PV-module; boost converter; INC algorithm; one stage; two stages; maximum power point tracking; MPPT; Routh's criterion.
International Journal of Modelling, Identification and Control, 2022 Vol.40 No.2, pp.176 - 191
Received: 01 Jun 2021
Accepted: 19 Sep 2021
Published online: 08 Aug 2022 *