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Authors
Abstract(s)
Esta dissertação apresenta um sistema capaz de agregar a energia disponível em múltiplas
fontes de energia e torna-la disponível num único barramento. Este sistema foi desenhado e
projetado tendo em vista a sua aplicação num sistema destinado ao autoconsumo que permita
a ligação tanto de painéis fotovoltaicos como de turbinas eólicas. O sistema implementado
baseia-se num conjunto distribuído de conversores DC/DC flyback interligados com um
único barramento DC. Para além disso, cada fonte de energia possui o seu próprio conversor
e sistema de controlo sendo completamente independente e isolada do barramento. Devido a
esta flexibilidade, o sistema implementado permite a adição ou remoção de fonte de energia
elétrica (painéis e/ou turbinas eólicas), sem interferir nas restantes. Além disso, o sistema de
controlo de cada conversor foi projetado para extrair a máxima potência de cada fonte de
energia através da aplicação de um algoritmo Maximum power point tracking (MPPT). Os
resultados práticos obtidos com três fontes de energia demonstram que o sistema proposto
apresenta um rendimento global que ronda os 90%. Além disso, testes práticos realizados
com um módulo fotovoltaico mostram que o sistema proposto é capaz de extrair a máxima
potência disponível em cada fonte com um pequeno erro.
ABSTRACT: This paper presents a system able to aggregate available energy in multiple power sources and make it available in a single bus. This system was designed and engineered to be connected to a self-consumption system allowing the connection of both photovoltaic modules and wind turbines. The implemented system is based on a distributed set of DC/DC flyback converters interconnected with a single DC bus. Furthermore, each energy source has its own driver and controller system. It is completely independent and isolated from the bus. Because of this flexibility, the implemented system allows the addition or removal of power sources (panels and/or wind turbines) without interfering with the others. Furthermore, the control system of each converter is designed to extract the maximum power of each power source by applying a Maximum Power Point Tracking (MPPT) algorithm. Practical results obtained with three distinct energy sources show that the proposed system has an overall efficiency of around 90%. In addition, practical tests with a FV module show that the proposed system is able to extract the maximum power available in each source with a small error.
ABSTRACT: This paper presents a system able to aggregate available energy in multiple power sources and make it available in a single bus. This system was designed and engineered to be connected to a self-consumption system allowing the connection of both photovoltaic modules and wind turbines. The implemented system is based on a distributed set of DC/DC flyback converters interconnected with a single DC bus. Furthermore, each energy source has its own driver and controller system. It is completely independent and isolated from the bus. Because of this flexibility, the implemented system allows the addition or removal of power sources (panels and/or wind turbines) without interfering with the others. Furthermore, the control system of each converter is designed to extract the maximum power of each power source by applying a Maximum Power Point Tracking (MPPT) algorithm. Practical results obtained with three distinct energy sources show that the proposed system has an overall efficiency of around 90%. In addition, practical tests with a FV module show that the proposed system is able to extract the maximum power available in each source with a small error.
Description
Keywords
Conversores DC/DC Autoconsumo Barramento DC Painéis Fotovoltaicos Turbinas eólicas Ponto de potencia máxima Microcontrolador Conversor Flyback RCD Snubber Combinador de energia