Voltage Limits
Mostrando 1-12 de 62 artigos, teses e dissertações.
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1. Computational algorithm for stability analysis of distribution networks with distributed generation
Abstract With the insertion of distributed generation in distribution networks, security analysis becomes crucial, in islanded operation or when the system is connected to the grid. Dynamic stability analyses are necessary in order to achieve minimum levels of security and reliability. Such analyses are obtained through the solution of the algebraic-differen
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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2. Development of a method for simultaneous analysis of caffeine and taurine in energy drinks by micellar electrokinetic chromatography with diode-array detector
Abstract The objective of this study was to develop, optimize and validate a fast and reliable method for the simultaneous determination of caffeine and taurine contents by micellar electrokinetic chromatography with diode array detector, using direct and indirect detection concomitantly. Multivariate statistical techniques were used as a central composite d
Food Sci. Technol. Publicado em: 16/09/2019
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3. Stability-indicating capillary zone electrophoresis assay for the analysis of linezolid in tablets
A simple and fast alternative methodology using capillary zone electrophoresis (CZE) to analyze linezolid and its cationic photodegradation products in tablets has been developed. The separation was carried out on fused silica capillary and conducted using 100 mM formic acid (pH 3.0) and by applying 30 KV voltage. Detection was performed at UV 254 nm. The op
Braz. J. Pharm. Sci.. Publicado em: 08/04/2019
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4. Fuzzy control applied to an electrical power generation system mounted on tractors for driving of agricultural implements
ABSTRACT The demand of the agricultural sector for more operationally efficient machines and implements motivated the development of alternatives for driving of this equipment. Aiming an electrical supply to apply in agricultural implements, this study proposes a system that uses the tractor power take off to activate a synchronous generator, using a fuzzy l
Eng. Agríc.. Publicado em: 2016-10
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5. A robustez de um sistema de distribuição e a alocação de medidores de qualidade da energia elétrica frente aos afundamentos de tensão / The robustness of a distribution system and an allocation of power quality monitors in the face of the voltage sags
This dissertation aims to initially reintroduce and spread the Fault Positions Method (FPM) as an analytic means to determine the remaining voltage in all bus bar constituents of a Distribution System (DS), upon the occurrence of voltage sags. By applying this method, it is possible to formulate the during fault voltage matrix, thus denoting the influence an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
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6. Estudo da influência dos parâmetros no processo de soldagem GMAW - arco pulsado
Pulsed gas metal arc welding describes the metal transfer mode involving oscillation (pulsing) of the welding current from a high pulse current in which level drop growth, necking of wire tip and detachment occur, and a low background current, which is applied to maintain the arc. The advantages of the process are: metal transfer without spatter formation an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/09/2011
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7. Innovation in X-Ray technology
In the Non-Destructive Testing (NDT) industry, the mayor trends are from film and stand alone applications to digital and inline inspection. Furthermore the quality requirements are growing driven by pushing design and material limits. Especially for field applications based on security reasons as well as image quality, replacement of isotopes can be monitor
Matéria (Rio de Janeiro). Publicado em: 2011
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8. Caracterização química elementar e identificação de fontes de obsidianas utilizando fluorescência de raios X com equipamento portátil (PXRF)
The study of archaeological and cultural heritage artifacts by means of analytical techniques with portable equipment has become increasingly routinely today. Various types of portable EDXRF equipment have been used in many different situations involving in situ analysis covering a wide range of geometries, detectors, current and voltage applied in the X-ray
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/03/2010
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9. Desenvolvimento e otimização de metodologia para análise de edulcorantes por Eletroforese Capilar
An innovative methodology was developed to simultaneously separate and quantify aspartame, cyclamate, saccharin and acesulfame-K through capillary electrophoresis with direct and indirect detection of UV, analysis time of roughly 6 minutes and with no sample derivatization. As the cyclamate has low absorptivity we used a system of electrolyte added to a chro
Publicado em: 2010
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10. Projeto de um sistema fotovoltaico autônomo de suprimento de energia usando técnica MPPT e controle digital
This work presents the design and development of a battery charger aiming at applications in autonomous photovoltaic systems of low energy consumption, using a Buck type converter with digital control for the loading process based on a digital signal processor TMS320F2812 from Texas Instruments. In order help dimensioning the converter components the photovo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/08/2009
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11. Physiological implications of the regulation of vacuolar H+-ATPase by chloride ions
Vacuolar H+-ATPase is a large multi-subunit protein that mediates ATP-driven vectorial H+ transport across the membranes. It is widely distributed and present in virtually all eukaryotic cells in intracellular membranes or in the plasma membrane of specialized cells. In subcellular organelles, ATPase is responsible for the acidification of the vesicular inte
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-02
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12. MÉTODOS PARA OTIMIZAÇÃO DOS AJUSTES DOS REGULADORES DE TENSÃO E ZONAS DE TAP EM SISTEMAS DE DISTRIBUIÇÃO / METHODS FOR OPTIMIZATION OF THE VOLTAGE REGULATORS AND TAP ZONES IN DISTRIBUTION SYSTEMS
The new regulations in the electric sector utilities have have requested greater efficiency and quality both in terms of continuity and in conformity of the energy supplied. Electrical equipments quality, efficiency and useful life depend directly of the power quality supplied. In addition to operation of equipments, supply of energy within the limits must b
Publicado em: 2009