Conversor CC-CA bidirecional monofásico tipo T de cinco níveis

• Main Author: Santos, Jean dos
• Publication Date: 2018
• Format: Master thesis
• Language: por
• Source: Repositório Institucional da UTFPR (da Universidade Tecnológica Federal do Paraná (RIUT))
• Download full: http://repositorio.utfpr.edu.br/jspui/handle/1/3938
• topic: Inversores elétricos; Conversores de corrente elétrica; Eletrônica de potência; Electric inverters; Electric current converters; Power electronics; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA; Engenharia Elétrica

This dissertation presents the analysis and implementation of a five level T-type single-phase CC-CA bidirectional converter, with the main goal of connecting it to the electric grid. Static and dynamic analyses are demonstrated, as well as, the stresses on each component of the structure. A design methodology is indicated, seeking the practical implementation of the topology, with a rated power of 2500 VA and 220 . All expressions developed through the mathematical analysis of the converter are validated by numerical simulations, proving the veracity of the presented equations. Positive aspects of the converter are observed, when a comparison with the H bridge converter is performed. Thus, resulting in a better efficiency. The main positive aspects found in the studied converter are: a) reduced losses in the inductor of the low pass filter; the switching in all the switches occurs with half the dc-link voltage; with a total of six semiconductors, two commutes at low frequency and four changes between dissipative and non-dissipative switching. b) with the five-level modulation, a better quality of the generated signal is verified, reducing harmonic distortions and electromagnetic interference. Therefore, in the end, these characteristics are proved by means of a practical implementation. Simulation and experimental results are presented with the purpose of validating the whole study developed in this work.