Magic Square permutation for photovoltaic models under partial shading

• Autor(a) principal: Lima, Alessandro de Souza
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/jspui/handle/123456789/28129
• topic: CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA; Photovoltaic panel arrangements; partial shading; Reconfiguration by Magic Square; Permutation of Magic Square

Modules in a photovoltaic arrangement can receive different solar irradiation levels. This phenomenon is knowns as partial shading and causes power losses, multiple maximum power points in the power-voltage curves and overheating of the modules with lower irradiance levels. This work aims to mitigate these adverse effects using a reconfiguration method on the array based on the puzzle technique of Magic Square. Modelling of the photovoltaic modules was carried out in a MATLAB/Simulink simulation environment. The tested arrays have the total-cross-tied configuration as well as configurations meeting Magic Square criterion from the original arrangement. A permutation of the unique solution adopted was also implemented aiming a larger number of Magic Squares to observe how it behave in several shading patterns. All tests were made using up to five different levels of irradiation divided on different patterns. The Magic Square permutations presented better maximum power points on the majority of the cases, achieving more than 45% more maximum power point in two cases.