Desenvolvimento matemático de MMC utilizando a estratégia de chaveamento PSCPWM

• Ano de defesa: 2015
• Autor(a) principal: Camargo, Renner Sartório
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Engenharia Elétrica; Centro Tecnológico; UFES; Programa de Pós-Graduação em Engenharia Elétrica
• Palavras-chave em Português: Análise harmônica; Conversores de corrente elétrica; Arranjos de lógica programável em campo; Modelos matemáticos; Fourier, Transformações de; Sistemas Elétricos de Potência; 621.3
• Link de acesso: http://repositorio.ufes.br/handle/10/9636

Most often present difficulties in multilevel converters are related to the design of their structures, mainly on the decision about the amount of levels (and therefore the number of switches to be used) on the switching frequency and the value of the index amplitude modulation that best suit the desired application. Usually, the design of the converters, including MMCs is primarily accomplished through a simulation software, for example, to determine the harmonic content of the inverter output voltage, spending considerable time, and therefore hindering any parameter change for the purpose of simulation. Thus, this study is dedicated to mathematically model the modular multilevel converter due to switching strategy (which also affects the harmonic distortion level), the number of levels, the voltage level and required level of harmonic distortion. The main objective is to get the equations inherent to the converter to facilitate manipulation of the number of levels, the switching frequency and amplitude modulation index, in order to support the choice of the designer without the need for modeling various converters. The tool chosen for the mathematical modeling was double Fourier transformed, as different from the fast Fourier transform, this enables simultaneous variation indexes of the fundamental wave and a carrier, enabling analysis of high and low harmonic multiple of the carrier frequency so simultaneously and with good accuracy, facilitating achievement of optimum parameters of the converter. The equationing was emulated in specific mathematical software (MATLAB®) and the results confronted in electromagnetic transient software (PSCAD / EMTDC®) and implemented in FPGA to guarantee the accuracy and solidity of the work.