Now showing items 1-10 of 31847
A neural approach to evaluate the effect of lightning in power transformers
This paper proposes the application of computational intelligence techniques to assist complex problems concerning lightning in transformers. In order to estimate the currents related to lightning in a transformer, a neural ...
Transformer Operation at Deep Saturation: Model and Parameter Determination
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INCPISCATAWAY, 2012)
This paper proposes a model that adequately describes the operation of the transformer at deep saturation, suitable for power-electronics applications, and a method for determining its parameters. Simulation and experimental ...
A Resonant Tertiary Winding-Based Novel Air-Core Transformer Concept
(Ieee-inst Electrical Electronics Engineers IncPiscatawayEUA, 2012)
Representation of transmission lines in modal domain using analytical transformation matrices
The phases of a transmission line are tightly coupled due to mutual impedances and admittances of the line. One way to accomplish the calculations of currents and voltages in multi-phase lines consists in representing them ...
Genetic transformation of astaxanthin mutants of Phaffia rhodozyma
Stable red astaxanthin-producing transformants were obtained after genetic transformation of two Phaffia rhodozyma mutants. A yellow mutant, accumulating β-carotene, and an albino mutant, accumulating phytoene, from P. ...
Reformulation of the fresnel transform to introduce sampling and recovery region control and its acceleration
(Instituto Nacional de Astrofísica, Óptica y Electrónica, 2010)
Influence of double excitation AC/DC in the reactive power demand of 3-phase transformers
In this work it is discussed the performance of the reactive power demand in three-leg transformer core and three-phase transformer bank, under different conditions of AC/DC double excitation. In order to analyse the ...
Solid state transformers: concepts, classification, and control
Increase in global energy demand and constraints from fossil fuels have encouraged a growing share of renewable energy resources in the utility grid. Accordingly, an increased penetration of direct current (DC) power sources ...