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Transmission line capacitance

transmission line capacitance, two wire transmission line electric field, transmission line FEA finite element analysis

3 phase transmission line above earth.

Problem Type
Plane-parallel problem of electrostatics.

Geometry
Transmission line capacitance Three phase transmission line above earth A B C Soil h = 5 m d = 1m

transmission line capacitance circuit
d = 1 m, h = 5 m.
Model depth l = 4 km.

Given
Relative permittivity of air ε = 1,

Solution
Transmission line of 3 conductors features self- and mutual- partial capacitances. It is convenient to use capacitance matrix calculator add-in to find all the partial capacitances.

Results
Electric field distribution around the transmission line.

transmission line capacitance matrixtransmission line capacitance matrix

C, nF Phase A Phase B Phase C
Phase A 13 3 2.9
Phase B 3 12.6 2.9
Phase C 2.9 2.9 12.9
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