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Main >> Applications >> Sample problems >> 3-phase transmission line with grounding

3-phase transmission line with grounding

Transmission line grounding, power transmission line simulation, 3 phase transmission line, three phase transmission line

This is an example of the 3-phase transmission line with grounding simulation, performed with QuickField software.

Problem Type
Plane-parallel problem of AC magnetics.

Geometry
Transmission line capacitance Three phase transmission line above earth C A B 1.5 m * + – UA400phase:0 UB400phase:120 UC400phase:240 A B C R_A2 R_B2.5 R_C1 L0.002 >

Given
Line length l = 4 km;
Copper conductor diameter d = 1 mm;
Conductivity of copper g = 58 MS/m;
Voltage U = 400 V;
Resistance R_A = 2 Ohm;
Resistance R_B = 2.5 Ohm;
Resistance R_C = 1 Ohm;
Inductance L = 0.002 H;
Ground resistance - 8 Ohm.

Task
In this tutorial we will calculate the current in the power transmission line connected with an external circuit load.

Result

Field distribution in 3-phase transmission line:

Field distribution in 3-phase transmission line, animated picture

New version QuickField 6.6

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