GMD and GMR simplify the transmission line inductance and capacitance calculations. What is GMR? GMR stands for Geometrical Mean Radius. GMR is also known as Self GMD or Self-Geometrical Mean Distance. GMR is usually denoted by the symbol D S.

2016年9月20日 · GMD & GMR stands for Geometrical Mean Distance and Geometrical Mean Radius. This concept is very useful in Power System for the calculation of Inductance and Capacitance of Transmission Line.

Self GMD and Mutual GMD – The use of self geometrical mean distance (abbreviated as Self GMD) and mutual geometrical mean distance (Mutual GMD) simplifies the inductance calculations, particularly relating to multiconduc­tor arrangements. The symbols used for these are respectively D s and D m. We shall briefly discuss these terms.

2021年8月22日 · The inductance and capacitance calculations of an overhead transmission line are simplified by using two important terms namely GMR (self GMD) and mutual GMD. Particularly, when there is a multiconductor arrangement, GMR and GMD ease the inductance and capacitance solving process.

D and d are geometric mean distances (GMD). is also known as the “geometric mean radius” (GMR) of the conductor. The description “geometric mean radius” is mathematically incorrect, but it is the equivalent radius of a simple cylindrical conductor that would have the same capacitance as the bundle conductor.

The use of self geometrical mean distance (abbreviated as self-GMD) and mutual geometrical mean distance (mutual-GMD) simplifies the inductance calculations, particularly relating to multi conductor arrangements.

A formula for the mutual inductance between a pair parallel of identical infinitesimally thin filaments can be turned into a formula for self inductance of a finite conductor by one of two methods:

For section 1 Mutual GMD = (Dab x Dbc x Dca)^(1/3) = (2x2x4) = 2.5198m. No need to calculate for section 2 and 3 because it will be same as section 1. Mutual GMD = Deq = 2.5198m

Geometric Mean Distance (GMD): In situations with more than two wires carrying current (i.e. three phases), for each wire we use D GMD to given an “effective distance” between the wire of interest and a

Geometrical mean distance (GMD): A term in power transmission lines corresponding to the spacing between the two (in a single phase) and three or six (in three phase) power lines used to determine the inductance and capacitance associated with lines.