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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Estudo e desenvolvimento de um m?todo de MPPT para sistemas PV, baseado na t?cnica P&O aplicado a um microinversor do tipo flyback

Rambo , Carlos Eduardo Bizarro 31 March 2015 (has links)
Submitted by Setor de Tratamento da Informa??o - BC/PUCRS (tede2@pucrs.br) on 2015-11-24T11:47:18Z No. of bitstreams: 1 476372 - Texto Completo.pdf: 4077296 bytes, checksum: 85b4c453088ae9f0ceed3d18c8ad4570 (MD5) / Made available in DSpace on 2015-11-24T11:47:18Z (GMT). No. of bitstreams: 1 476372 - Texto Completo.pdf: 4077296 bytes, checksum: 85b4c453088ae9f0ceed3d18c8ad4570 (MD5) Previous issue date: 2015-03-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Funda??o de Amparo ? Pesquisa do Estado do Rio Grande do Sul - FAPERGS / This work presents the study and development of a modification proposal of the classical MPPT - P&O approach, based on the utilization of the power and voltage derivatives in PV panel terminals. The contribution of this study consists in the employment of the time derivative of voltage that is used to determine converter duty cycle step size instantly. The proposed MPPT approach when compared to the classical P&O, presents some advantages like as: better dynamic response, steady state error reduction and robustness (considering different irradiation and temperature profiles). In order to validate this study, a microinverter prototype based on flyback converter, using this new approach, was implemented aiming to connect PV panels to the mains. Microinverter control strategy was held on Matlab/Simulink? environment in association to a data processing board (DS1104 from dSPACE?). / Este trabalho apresenta o estudo e o desenvolvimento de uma proposta de modifica??o do m?todo de MPPT P&O cl?ssico com base na utiliza??o da derivada da pot?ncia e da derivada da tens?o nos terminais dos pain?is PV. A contribui??o deste trabalho consiste no emprego da derivada da tens?o dos pain?is, a qual ? utilizada para determinar a varia??o instant?nea do ciclo de trabalho do conversor. O m?todo de MPPT proposto em compara??o com o m?todo P&O convencional apresentou melhor desempenho considerando-se a resposta din?mica, o erro de estado estacion?rio e a robustez (contra diferentes perfis de irradi?ncia e de temperatura). A fim de validar este estudo, um prot?tipo de um microinversor com base no conversor flyback, usando a abordagem proposta, foi implementado com o objetivo de conectar pain?is fotovoltaicos ? rede el?trica. A estrat?gia de controle do microinversor foi realizada em ambiente Matlab/Simulink? em associa??o a uma placa de processamento de dados (DS1104 da dSPACE?).

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