Why is the Geometric Mean Distance (GMD) of two different conductors the same in a transmission line while the Geometric Mean Radius (GMR) of the two conductors are not the same in the same transmission line?

Why is the Geometric Mean Distance (GMD) of two different conductors the same in a transmission line while the Geometric Mean Radius (GMR) of the two conductors are not the same in the same transmission line?

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.18MCQ

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Coulomb’s Law

Coulomb's law states that the attraction or repulsion force between two charged things is proportional to the product of their charges and inversely proportional to the square of their distance. It has an effect along the line that connects the two-point charges.

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Why is the Geometric Mean
Distance (GMD) of two different
conductors the same in a
transmission line while the
Geometric Mean Radius (GMR)
of the two conductors are not the
same in the same transmission
line?

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Transmission line conductance is usually neglected in power system studies. True False
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In terms of line-to-line capacitance, the line-to-neutral capacitance of a single-phase transmission line is Same Twice One-half
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