Sergio Luiz Schubert Severo

Instituto Federal de Educação, Ciência e Tecnologia Sul-Rio-Grandense (IFSUL) | IFSUL · Departamento de Engenharia Elétrica

Resumo: A disciplina de introdução à engenharia elétrica, entre outros objetivos, visa motivar os alunos para os estudos na área de engenharia. Para tal, foi aplicado um conjunto de atividades de laboratório de integração de hardware e desenvolvimento de software embarcado. As atividades resultaram em sistemas simples de automação relacionados ao q...

The measurement of the dielectric properties of materials has been applied in non-destructive tests, humidity measurement, soil analysis and even cancer detection. The methods have been developed for over 70 years based on the interaction of the electromagnetic waves with the material under test. This work presents a general model of scattering par...

Diferente do ciclo básico, suportado pelos laboratórios clássicos, e do ciclo específico, onde as atividades práticas já são as do fazer do engenheiro, o ciclo profissionalizante dos cursos de engenharia levanta questões a respeito de quais as atividades práticas mais adequadas para esse período. Entende-se esse ciclo como a ponte entre o ideal e o...

Apresenta-se um " kit " didático para dar suporte as atividades práticas do laboratório de ondas eletromagnéticas do curso de Engenharia Elétrica do Instituto Federal Sul-rio-grandense. Realiza-se a construção de um sistema composto por medidor de coeficiente de reflexão vetorial de baixo custo, uma linha de transmissão do tipo TEM, fonte de micro...

Two popular wireless communication devices are considered in this paper. Firstly, the Bluetooth which is one of the most popular mobile accessories and the Google glasses which are a representation of the new futuristic vision. It is well known that the absorption of electromagnetic waves on the human head for a certain period of time may lead to h...

This paper presents a novel approach to deal with the synchronization of microgrids to the main grid. It is based on the use of a power electronic device derived from the original concept of the SSSC (Static Synchronous Series Compensator). The proposed scheme considers the connection of this device at the point-of-interconnection (POI) of the micr...

This paper presents a novel approach to deal with the synchronization of microgrids to the main grid. It is based on the use of a power electronic device derived from the original concept of the SSSC (Static Synchronous Series Compensator). The proposed scheme considers the connection of this device at the point-of-interconnection (POI) of the micr...

Apresenta-se uma planilha de cálculo empregada para dar suporte as atividades práticas do laboratório de ondas eletromagnéticas do curso de Engenharia Elétrica do Instituto Federal Sul-rio-grandense. Utiliza-se um experimento clássico de determinação da permissividade dielétrica de uma lâmina de material com espessura da ordem do comprimento de ond...

This paper presents a T-slot planar inverted F antenna (PIFA) for wireless mobile communications GSM/UMTS/WCDMA systems. A modified ground plane is used to increase the bandwidth. A prototype is implemented and the differences in performance of the antenna with and without the presence of the mobile handset and the user's head are estimated. The si...

This paper presents an innovative digital phase-locked-loop (PLL) implementation that uses a moving average filter with a very high rejection on the fundamental frequency and its harmonics. This PLL is very versatile and can be used for synchronizing single-phase sources, control of drives, among others. Due to its fully digital implementation it h...

This paper presents a technique for synchronizing synchronous generators without speed control. The proposed construction is under development in a research project which aims to control auxiliary synchronous generators in a hydroelectric power unit. An UPFC device is used to achieve the synchronism of the synchronous generator with the power syste...

Apresentação dos laboratórios para o ciclo profissionalizante da Engenharia Elétrica do IFSUL

This paper presents an innovative system (hardware and software) that incorporates the main functions typically found alone in SCADA, oscillography and advanced metering infrastructure systems. The developed system maintains all the characteristics of a SCADA system, suitable for the operation of a distributed generation, while it incorporates osci...

With the evolution observed nowadays in power electronics systems, frequency converters are increasingly used in the grid. However, due to switching techniques employed, the harmonic distortion of the resulting signals became an important parameter to be considered in the design of such converters. For this reason, special attention has been given...

This paper presents the initial results of a research project that aims to develop a control system for active power regulation in synchronous auxiliary generators connected to hydraulic generation units. In this sense, the developed system is based on the compensation of the inductive impedance of the auxiliary generator using TCSC switched by IGB...

This paper presents a new approach to acquire a knowledge base (MKB) of continuous processes through a distributed system. The proposed methodology combines MKB and case-based reasoning (CBR) for adaptive knowledge base creation, maintenance and updating trough the use of an architecture with the following aspects: i) distributed architecture netwo...

This paper presents an innovative proposal for a SCADA system platform, integrating oscillographic capabilities to the set of functions found in standard supervisory and control systems. The proposed SCADA system was developed using C++ language, targeted to x86-64/Windows 7 processing platforms, and is based on multithreading programming. The resu...

Instituto Federal Sul-rio-grandense, Engenharia Elétrica, Campus Pelotas Praça Vinte de Setembro 455. CEP 96015-360 – Pelotas-RS Fernanda Oliveira Rezende – fernandarezende91@gmail.com Instituto Federal Sul-rio-grandense, Engenharia Elétrica, Campus Pelotas Praça Vinte de Setembro 455. CEP 96015-360 – Pelotas-RS Resumo: O projeto pedagógico do curs...

This paper presents initial project and test results of an active power control scheme development for auxiliary synchronous generators of an AES-Distribution System connected Hydraulic Generation Unit. An open loop control system using TCSC switched by IGBT's is proposed to compensate the inductive impedance of the synchronous generator and contro...