Calculation of electrical parameters for short and long polyphase transmission lines

Galloway, R.H.; Shorrocks, W.B.; Wedepohl, L.M.

doi:10.1049/piee.1964.0331

Cited by 104 publications

(16 citation statements)

References 2 publications

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“…Traveling waves phenomena in polyphase systems have been analyzed by Wedepohl (1963) and Galloway (1964). Those works generalized the telegraph equations for more than one dimension, and introduced the term of characteristic self impedance and characteristic mutual impedance between phases.…”

Section: Introductionmentioning

confidence: 99%

TEM Waves Guided between Many Conductors

Ianconescu¹

2013

MAS

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Guided TEM waves have been extensively investigated between 2 conductors. The multiconductor case, in spite of some important publications in this direction, did not get into the mainstream of the electromagnetic education, and therefore deserves some more attention. The simple case of lossless multiconductor TEM waves in homogeneous media is a good approximation for many practical cases and is easily derivable by usage of potentials only. In this work we derive the formalism for lossless multiconductor TEM waves in homogeneous media, and show several examples for the usage of this formalism.

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Section: Introductionmentioning

confidence: 99%

TEM Waves Guided between Many Conductors

Ianconescu¹

2013

MAS

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“…"Galloway and Wedepohl" Method: Assuming that the depth of penetration is very small at high frequencies, the current density at the surface of the conductor is proportional to the magnetic-field intensity at the surface, as (8) shows [18]. (8) where…”

Section: B Simulation Considerations 1) Conductor Temperaturementioning

confidence: 99%

A Novel Approach to Utilize PLC to Detect Corroded and Eroded Segments of Power Transmission Lines

Hamidi

Hosseinian

Sadeghi

et al. 2015

IEEE Trans. Power Delivery

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A great number of existing power transmission lines have aged throughout the world. A considerable proportion of them are located in the environments that exacerbate their corrosion and erosion process. In-time detection of defects necessitates the use of nondestructive testing (NDT) techniques. Scanning the lines with robots and helicopters are the methods in use. In this paper, we propose a new NDT technique that uses the elements of power-line carriers, generally for information communication purposes, to detect the possibly corroded and eroded segments of each phase along a transmission line. The proposed NDT technique is based on the backward-wave propagation produced by a change in the characteristic impedance of a power transmission line, resulting from corrosion and erosion. To demonstrate the viability of the proposed approach, "EMTPWorks" is used to perform simulations. It is shown that the proposed technique can locate the surface defects and estimate the severity of them in transmission line conductors.

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“…It will follow the shortest path, the path of least resistance, to return to its source. Analysis of earth current usually requires the use of Carson's equations [9]. However, in this simulation we are concerned with the earth current that is coupling with the telephone cables in the same right-of-way as the system neutral and phase conductors.…”

Section: A System Modelmentioning

confidence: 99%

Filtering dispersed harmonic sources on distribution

Jewell

Miller²,

Casey

2000

IEEE Trans. Power Delivery

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Telephone company customers reported audible noise in their telephone service. Through measurements, analysis, and simulations, 540 Hz noise was found to be coupling from power distribution to telephone cables in a shared underground right-of-way. The source of the noise was small single-phase electronic loads dispersed throughout the power distribution system in the area. A passive shunt filter was designed using an existing capacitor bank. Installation of this filter reduced the noise to acceptable levels.Index Terms-Earth, grounding, harmonic analysis, passive filters, power distribution electromagnetic interference, power filters, power system harmonics, power system modeling, power system simulation, wire communication interference.

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Calculation of electrical parameters for short and long polyphase transmission lines

Cited by 104 publications

References 2 publications

TEM Waves Guided between Many Conductors

TEM Waves Guided between Many Conductors

A Novel Approach to Utilize PLC to Detect Corroded and Eroded Segments of Power Transmission Lines

Filtering dispersed harmonic sources on distribution

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