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Disc insulator leakage current

power transmission line insulator, hv insulator heating, multiphysics analysis

Disc insulator of electric power transmission line.

Problem Type
Axisymmetric multiphysics problem of AC Conduction coupled to Heat transfer.

Geometry
Disc insulator leakage current Calculate the thermal effect of the leakage currents in the insulator. Cement Porcelain Metal cap Dirt layer Clamp

Given
Relative permittivity of porcelain ε = 6,
Relative permittivity of cement ε = 2.
Dirt layer thickness 1 mm.
Dirt layer conductivity 30 uS/cm.
Porcelain thermal conductivity 1.4 W/K-m.
Air temperature +20°C, convection coefficient α = 10 W/K-m².

Task
Calculate the thermal effect of the leakage currents in the insulator.

Results
Leakage current density distribution in the insulator (on the left), insulator temperature profile (on the right).

Disc insulator leakage current

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