The peak value of lightning-induced voltages in overhead lines for high resistivity soils

2017 ◽  
Author(s):  
Jose Osvaldo Saldanha Paulino ◽  
Celio Fonseca Barbosa
Keyword(s):  
High Resistivity ◽  
Overhead Lines ◽  
Peak Value

Effect of high-resistivity ground on the lightning performance of overhead lines

2019 ◽  
Vol 172 ◽  
pp. 253-259
Author(s):  
José Osvaldo Saldanha Paulino ◽  
Celio Fonseca Barbosa
Keyword(s):  
High Resistivity ◽  
Overhead Lines

An Approximate Formula for the Peak Value of Lightning-Induced Voltages in Overhead Lines

2010 ◽  
Vol 25 (2) ◽  
pp. 843-851 ◽  
Author(s):  
José Osvaldo Saldanha Paulino ◽  
Célio Fonseca Barbosa ◽  
Ivan J. S. Lopes ◽  
Wallace do Couto Boaventura
Keyword(s):  
Approximate Formula ◽  
Overhead Lines ◽  
Peak Value

On Lightning-Induced Voltages in Overhead Lines Over High-Resistivity Ground

2019 ◽  
Vol 61 (5) ◽  
pp. 1499-1506 ◽  
Author(s):  
Jose Osvaldo Saldanha Paulino ◽  
Celio Fonseca Barbosa
Keyword(s):  
High Resistivity ◽  
Overhead Lines

The Peak Value of Lightning-Induced Voltages in Overhead Lines Considering the Ground Resistivity and Typical Return Stroke Parameters

2011 ◽  
Vol 26 (2) ◽  
pp. 920-927 ◽  
Author(s):  
José Osvaldo S. Paulino ◽  
Célio Fonseca Barbosa ◽  
Ivan J. S. Lopes ◽  
Wallace do Couto Boaventura
Keyword(s):  
Return Stroke ◽  
Overhead Lines ◽  
Peak Value

JFET FOR COMPLETELY DEPLETED HIGH RESISTIVITY SILICON

1988 ◽  
Vol 49 (C4) ◽  
pp. C4-363-C4-366 ◽  
Author(s):  
V. RADEKA ◽  
P. REHAK ◽  
S. RESCIA ◽  
E. GATTI ◽  
A. LONGONI ◽  
...  
Keyword(s):  
High Resistivity ◽  
High Resistivity Silicon

A novel analytical calculation of magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping

2020 ◽  
pp. 1-15
Author(s):  
Jianqi Li ◽  
Yu Zhou ◽  
Jianying Li
Keyword(s):  
Magnetic Field ◽  
Conformal Mapping ◽  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Method ◽  
Electromotive Force ◽  
Analytical Calculation ◽  
Air Gap ◽  
Permanent Magnet Machines ◽  
Peak Value

This paper presented a novel analytical method for calculating magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping. Firstly, flux density without slots and complex relative air-gap permeance of slotted air gap are derived from conformal transformation separately. Secondly, they are combined in order to obtain normalized flux density taking account into the slots effect. The finite element (FE) results confirmed the validity of the analytical method for predicting magnetic field and back electromotive force (BEMF) in the slotted air gap of spoke-type permanent-magnet machines. In comparison with FE result, the analytical solution yields higher peak value of cogging torque.

The choice of optimum cross section for overhead line by economic intervals' method

2011 ◽  
Vol 28 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Svetlana Guseva ◽  
Lubov Petrichenko
Keyword(s):  
Cross Section ◽  
Current Density ◽  
Uncertain Information ◽  
Overhead Line ◽  
Market Conditions ◽  
Overhead Lines ◽  
Mathcad Software

The choice of optimum cross section for overhead line by economic intervals' methodIn this paper an approach to choosing the optimum cross section for overhead line in conditions of incomplete and uncertain information is considered. The two methods of such choice are presented: method of economic current density and economic intervals' method. The correction of the economic intervals method is offered under market conditions of costs. As example 20 kV and 110 kV overhead lines with aluminum, copper and ferroaluminum wires are selected. Universal nomograms with different standard cross section are calculated and constructed. The graphics using Mathcad software are offered.

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