Voltage Fluctuations
Mostrando 1-12 de 80 artigos, teses e dissertações.
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1. Recubrimientos porosos de dióxido de titanio sintetizados por oxidación anódica
ABSTRACT Titanium dioxide is one of the most used materials in heterogeneous photocatalysis due to its commercial availability, low cost, chemical stability, low toxicity and high photocatalytic activity. One of the most efficient and economical methods to obtain TiO2 coatings is the plasma electrolytic oxidation. In this anodization process, a direct curren
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Green Energy Generation Using FLC Based WECS With Lithium Ion Polymer Batteries
ABSTRACT Green Energy Generation Using Wind energy conversion system is achieved using Lithium Ion Polymer Batteries and Fuzzy logic controller. Presented scheme also provides the constant output power for the stand alone loads like Island, Hills Stations, Ships and Remote locations etc. A fuzzy-logic controller based Wind energy conversion system with perma
Braz. arch. biol. technol.. Publicado em: 23/01/2017
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3. Analysis of flicker level on the integration of fixed speed wind generators using multidiscipline models / Análise dos níveis de flicker na integração de geradores eólicos de velocidade fixa em redes de distribuição de energia elétrica utilizando modelos multidisciplinares
The discussions about the environmental issues and the need for renewable sources of energy, with low environmental impacts, mainly about CO 2 emission, have encouraged the Wind Energy expansion. The support for wind energy in the last decades enabled the improvement of the technology and a representative share in the electrical systems of some countries. Th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2011
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4. Uma contribuição à análise das componentes interharmônicas e seus efeitos nos indicadores de flutuação de tensão
Neste trabalho são realizadas diversas análises técnicas relacionadas com a questão das inter-harmônicas nos sistemas de energia elétrica. Neste aspecto, inicialmente, são apresentados os fundamentos teóricos relacionados com o tema, assim como com o fenômeno das flutuações de tensão, evidenciando-se a forte correlação existente entre interharm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2009
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5. VOLTAGE STABILITY PROBABILISTIC ASSESSMENT IN COMPOSITE GENERATION AND TRANSMISSION SYSTEMS / ANÁLISE PROBABILÍSTICA DA ESTABILIDADE DE TENSÃO EM SISTEMAS COMPOSTOS DE GERAÇÃO E TRANSMISSÃO
In some countries, the electric power systems are operating near to their limits due to the absence of investments in the transmission network expansion and natural growth of the electricity demand. This operation condition can also occur in electric power systems in which the transmission expansion is carried out in appropriate way. In this case, the excess
Publicado em: 2009
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6. Desenvolvimento de conversor comutado em baixa frequencia para aplicação em sistemas de geração distribuida baseados em celulas a combustivel / Development of a low-frequency commutation converter for distributed generation system based on fuel cells
The connection of distributed power sources with the utility grid generally needs an electronic power converter for processing the locally generated power and injecting current into the system. This work presents a system intended to low-power distributed generation composed by a DC primary source, as a fuel cell. A boost converter connects the supply to an
Publicado em: 2006
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7. Electrical characterization of PbTe p-n junctions for applicarion in infrared detectors. / Caracterização elétrica de junções p-n de PbTe para aplicação em detectores de infravermelho.
This work reports on the electrical characterization of PbTe p-n junctions for application in photovoltaic detectors in the medium infrared range. For this purpose, a series of p-n junctions, where the hole concentration p was kept at 1017 cm-3 and the electron concentration n varied between 1017 and 1019 cm-3, was successfully grown by molecular beam epitax
Publicado em: 2004
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8. Flutuações de composição em um elastomero dieletrico processado por extrusão
Dielectric polymer materials, such as the elastomers based on poly(ethylene/propylene/1,4-hexadiene), also called EPDM or ethylene-propylene rubbers, are normally used for the electric insulation of hiqh voltage cables. The dielectric strength of these materiaIs is one of the most significant properties for the evaluation of their performance, as a function
Publicado em: 1988
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9. NERVE MEMBRANE CURRENT NOISE: DIRECT MEASUREMENTS UNDER VOLTAGE CLAMP*
Fluctuations in the steady-state current of the membrane of the lobster giant axon have been measured under voltage-clamp conditions. These fluctuations have a power density spectrum that is inversely proportional to frequency. The magnitude of the fluctuations is determined largely by the potassium component of the membrane current.
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10. Plasmalemma Voltage Noise in Chara corallina1
Voltage noise analysis is applied to plasmalemma ion transport in Chara corallina. There is a component in the noise power spectrum that is probably associated with current fluctuations within passive transport channels, and another component that may be associated either with fluctuations in the number of open channels, or with active transport. The data al
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11. Sodium currents and sodium-current fluctuations in rat myelinated nerve fibres
1. Sodium currents and fluctuations of sodium currents were measured in myelinated fibres of rat sciatic nerve under voltage clamp at 20 °C.
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12. Non-stationary fluctuations of the potassium conductance at the node of ranvier of the frog.
Potassium currents were recorded from voltage-clamped nodes of isolated, myelinated axons of Rana pipiens. Nodes were maintained in a modified Ringer solution containing tetrodotoxin to block sodium current and 47.5 mM-potassium to minimize effects of extracellular potassium accumulation. Voltage protocols included depolarizing pulses lasting a few milliseco