Jose Brandao Faria

Prof. Dr. Jose Brandao Faria

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Research Focus & Metrics

Academic Career Length

43Years (1984-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 June 1998 in IEEE Transactions on Instrumentation and Measurement
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JFJose Brandao Faria
Jose Brandao Faria

1 January 1997 in IEEE Transactions on Power Delivery
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Journal Article
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JFJose Brandao Faria
Jose Brandao Faria
JBJ. Hildemaro Briceno
J. Hildemaro Briceno
Fortescue's transformation, Clarke's transformation and Karrenbauer's transformation are all well-known tools which can be used to conduct a modal analysis of perfectly balanced transposed three-phase power transmission lines. For untransposed asymmetrical lines, however, such standard transformations fail. Nevertheless, all these transformation matrices can still play an important role in determining a first order approximation of the exact modal transformation. This paper shows how this can be done by employing a perturbation technique approach. In addition to the theoretical aspects discussed, some application examples concerning a vertical and a triangular line are also presented for illustrative purposes.

21 August 2008
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Book
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JFJose Brandao Faria
Jose Brandao Faria
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2 April 2007 in IEEE Transactions on Power Delivery
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Journal Article
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JFJose Brandao Faria
Jose Brandao Faria
MPMaria Eduarda Almeida Pedro
Maria Eduarda Almeida Pedro
An accurate method for the evaluation of 50-Hz magnetic fields produced by overhead power lines is presented. The method, which is based on the matrix formalism of multiconductor transmission lines (MTL), allows for a correct evaluation of all the currents flowing in the MTL structure, including the currents in the subconductors of each phase bundle, the currents in the ground wires, the currents in the mitigation loop (if present), and also the earth return currents. Furthermore, the analysis also incorporates the nonuniform character of the structure arising from conductor sagging between towers. Frequency domain magnetic field calculations are performed by vectorial sum of the magnetic effects originated by all the existing currents. For exemplification purposes the case of an actual 400-kV-1.4-GVA single-circuit three-phase line is examined. Results presented include a discussion on the effects of mitigation loops with or without capacitor compensation

1 January 1997 in IEEE Transactions on Power Delivery
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Journal Article
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JFJose Brandao Faria
Jose Brandao Faria
JMJ.H. Briceno Mendez
J.H. Briceno Mendez
Modal analysis of three-phase power lines exhibiting bilateral symmetry leads to modal transformation matrices that closely resemble Clarke's transformation. We develop a perturbation theory approach to justify, interpret, and gain understanding of this well known fact. Further, we show how to find new frequency dependent correction terms that once added to Clarke's transformation lead to improved accuracy.

3 April 2012 in IEEE Transactions on Power Electronics
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Journal Article
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JFJose Brandao Faria
Jose Brandao Faria
Most problems related to contactless energy transfer are usually dealt within the framework of transformer theory, employing equivalent electric circuits as a tool for their analysis. Here, however, a physics approach based on the Maxwell equations is followed. Electric and magnetic fields are utilized to evaluate the Poynting vector, which defines the direction and power density carried by the electromagnetic field. The concepts of magnetic voltage and magnetic flux are utilized to define the instantaneous power guided within the magnetic transmitter. Contactless energy transfer requires two separate parts, a transmitter and a receiver circuit. In this paper, we pay attention to the electromagnetic field guided and emitted by the transmitter; internal skin effect (eddy currents losses) is accounted for; electromagnetic energy leaving the transmitter is evaluated using short-dipole antenna theory. This paper does not offer a new practical application of contactless energy transfer. Its scope is rather different; its aim is to provide a fresh look on contactless energy transfer in the context of an electromagnetics framework.