41170
POCTI/ESE/41170/2001
FCT - Fundação para a Ciência e a Tecnologia, I.P.
Portugal
POCI
65,000.00 €
2002-05-13
2006-05-12
This paper describes the development of a low cost digital system used for power quality monitoring and power management. The system uses voltage and current Hall sensors, a standard data acquisition board, and has its processing system based in LabVIEW™, running on a regular PC. The system acquires data continuously, and storage in files the events that result from the anomalies detected in the monitored power...
This paper presents the evolution of renewable energy generation in Portugal in the last decade, and explains the legislation and incentives in existence. The paper also presents suggestions that could incentive small and medium consumers to install renewable energy power plants (namely of wind power and photovoltaic types) in their facilities. These power plants would have to accomplish present legislation reg...
The present paper describes a shunt active power filter with a control system based on the p-q theory, and studies its performance through simulation results obtained with different types of loads. It is explained, in a brief form, the p-q theory and its application in the control of a shunt active power filter. Matlab/Simulink was the simulation tool, used in the study, development, and performance evaluation ...
Apresenta um sistema em desenvolvimento no Departamento de Electrónica Industrial da Universidade do Minho, cujo objectivo é extrair energia eléctrica a partir de fontes de energia renováveis e fazer a interface com a rede eléctrica recorrendo a um Filtro Activo Paralelo (FAP), que para além de injectar a energia na rede tem também a capacidade compensar harmónicos e factor de potência.; Os autores agradecem à ...
Este artigo apresenta a modelação, simulação e análise de um sistema que realiza a interface entre fontes de energia renovável (como por exemplo, energia solar ou eólica) e a rede eléctrica. O objectivo é demonstrar que, utilizando um Filtro Activo de Potência do tipo Paralelo, composto por um andar inversor e por um sistema de controlo baseado na teoria p q, é possível injectar energia na rede eléctrica e, sim...
Este artigo relata e analisa alguns exemplos de casos reais de problemas de qualidade de energia eléctrica observados em diferentes instalações eléctricas. São ainda apontadas soluções para cada um dos casos.; Fundação para a Ciência e a Tecnologia (FCT), financiadora do Projecto POCTI/ESE/41170/2001.
The evolution of Internet and all related technologies contributed, a lot, for the development of the e-learning. This paper discusses the advantages in using the new Technologies, namely the Internet, as an aid tool to teaching, and presents an example developed in the Degree of Industrial Electronics and Computer Engineering at University of Minho. It also discusses the motivations of the students on acquirin...
Baseado em trabalhos de investigação e desenvolvimento tecnológicos realizados no Departamento de Electrónica Industrial da Universidade do Minho, o Projecto SINUS tem como objectivo a validação da tecnologia para a compensação dinâmica de harmónicos, factor de potência e desequilíbrios, de forma a demonstrar ao público especializado, e em situação real, as suas vantagens técnicas e económicas.; O Projecto SINU...
This paper presents a versatile low cost equipment that allows simultaneous display of usually required measurements in electric circuits, like true RMS (Root Mean Square) values of mains voltage and current, line frequency, power factor, active, reactive and apparent power, and energy. The equipment is based on a microcontroller that interfaces current and voltage transducers through 16 bits sigma-delta ADCs (...
This paper presents a laboratory prototype of a 3-phase 4-wire Shunt Active Power Filter used to compensate the source currents in an electrical system. The controller, based on the well known p-q theory was implemented on a DSP and determines the reference currents to be generated by a 2-level inverter. Some experimental results are presented and compared with computer simulations obtained with EMTDC/PSCAD V4....
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