Development of a high granularity photovoltaic model that considers complex nonuniform shadow conditions and different cell temperatures

In this paper is the development of a high granularity photovoltaic model that considers complex nonuniform shadow conditions and different cell temperatures. The model integrates the nonuniform shading characteristics such as different areas for each cell, different direct and indirect solar irradiations for each cell, and different temperatures. The area of the shadow on the PV module is found using image processing. The bond graph formalism facilitates the representation of the energy exchange between the different parts of the PV module. This complexity justifies the effort to develop a high-granularity tool. The proposed model is validated through experimental tests under shading conditions. This work is based on previous works by the authors as García-Gutiérrez (Développement d’un contrôle actif tolérant aux défaillances appliqué aux systèmes pv, Mar 2019 [Online]. Available: http://thesesups.ups-tlse.fr/4383/ ; Development of an active-fault tolerant control applied to PV systems. Theses, Université Toulouse 3 Paul Sabatier (UT3 Paul Sabatier), Mar 2019 [Online]. Available: https://hal.laas.fr/tel-02147149), Alonso et al (High granularity model of a photovoltaic array under complex shadow conditions. In: Electrimacs 2019, Palerme, May 2019 [Online]. Available: https://hal.laas.fr/hal-02053484), and Garcia-Gutierrez et al (Design of a global maximum power point tracking (gmppt) for pv array based on precise pv shadow model. In: 2018 7th international conference on renewable energy research and applications (ICRERA), 2018, pp 275–280).