Inversor fotovoltaico não isolado NPC intercalado

• Ano de defesa: 2016
• Autor(a) principal: Finamor, Gustavo Andres
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; BR; Engenharia Elétrica; UFSM; Programa de Pós-Graduação em Engenharia Elétrica
• Palavras-chave em Português: Inversor fotovoltaico NPC multinível intercalado; Sem transformador; Alta densidade de potência; Alto rendimento; Photovoltaic interleaved multilevel NPC inverter; Transformerless; High power density; High efficiency; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/8585

Throughout the twentieth century, the supply of electricity, mainly obtained from fossil fuels like oil and coal, it has supported the growth and transformation of the world economy. In the early years of this century, the scenario has changed to a new reality, the need for sustainable development. In other words, the challenge is to gradually replace the traditional sources of electricity from renewable energy sources, in which the solar photovoltaic energy has highlighted. Photovoltaic inverters may be constituted in different ways, presenting in recent decades a high research progress. The main study efforts focus on getting high efficiency, high power density and high reliability, to increase the overall performance of the photovoltaic installation. In this direction, this Master Thesis aims to propose, analyze, design and implement a single-phase grid-tied photovoltaic inverter, which provides high efficiency and high power density. This circuit is called Transformerless Photovoltaic Interleaved Multilevel NPC Inverter , that use uncoupled inductors, Gallium Nitride power transistors and employs interleaving strategy beside the LCL filter, synthesizing 9 levels. Are introduced studies on the operation, modulation and design methodology of power stages, considering the static performance. Results are presented for the 1 kW, in order to support the validity of the proposed topology in conjunction with the standard aspects, especially in relation to THD (Total Harmonic Distortion) of grid current, leakage current, efficiency and power density.