Harmonic Power Flow
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Propagation of vibrational modes in classical harmonic lattice with correlated disorder
Abstract: The vibrational modes with nonzero frequency are localized in harmonic lattice with disordered masses. In our work, we investigated numerically the propagation of vibrational energy in harmonic lattice with long-range correlated disordered masses, which are randomly distributed with power law spectrum S ( k ) ∝ k − α. For α = 0, a standar
An. Acad. Bras. Ciênc.. Publicado em: 01/07/2019
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2. Estimação de estados de distorções harmônicas em sistemas elétricos de potência utilizando estratégias evolutivas. / Power systems harmonic distortion state estimation using evolutionary strategy.
The aim of the present thesis is to develop a Harmonic Distortion State Estimation algorithm for Power Systems. Although the cost of Power Quality Meters has decreased for a while now, it is still not practicable the use of one meter for each real system bus. This demands a Harmonic Distortion State Estimation (HDSE) algorithm to find the harmonic components
Publicado em: 2008
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3. Propostas de procedimentos para projetar filtros harmônicos a partir de um programa de penetração harmônica, incluindo cálculos de desempenho e de suportabilidade
This work introduces some proposals for the design of harmonic filters from a harmonic penetration computer program. Such procedures are developed by means of optimized techniques, taking in account, among other aspects, the filtering performance, the filter detuning as well as international guides referring to the supportability of the filter components, as
Publicado em: 2007
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4. Propostas de procedimentos para projetar filtros harmÃnicos a partir de um programa de penetraÃÃo harmÃnica, incluindo cÃlculos de desempenho e de suportabilidade
Este trabalho propÃe diretrizes para a elaboraÃÃo de procedimentos sistemÃticos que conduzem ao projeto de filtros harmÃnicos, a partir de um programa de fluxo harmÃnico. Tais procedimentos sÃo desenvolvidos por meio de tÃcnicas otimizadas, levando-se em conta, dentre outros aspectos, o desempenho de filtragem, a dessintonia dos filtros, bem como nor
Publicado em: 2007
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5. Power electronica control in direct water heater of optimized half cycles. / Controle eletrônico de potência em aquecedores elétricos de passagem por semi ciclos otimizados.
Modern electrical direct water heating (DWH) equipments use electrical resistances built with metal alloys (iron-chrome-aluminum or nickel-chrome) as heating elements. Water temperature control is usually made with water flow control, as well as with resistance tap changing. The simplicity of this approach conflicts with to the lack of flexibility to allow s
Publicado em: 2006
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6. Cerebral autoregulation of preterm neonates--a non-linear control system?
The low frequency cerebral blood flow velocity (CBFV) oscillations in neonates are commonly attributed to an under-dampened immature linear type cerebral autoregulation, and the 'instability' is regarded as causative for peri-intraventricular haemorrhage/periventricular leukomalacia. In contrast, oscillations susceptible to frequency entrainment are a fundam