Disc insulator leakage current - QuickField simulation example
Disc insulator of electric power transmission line.
How to find thermal effects of leakage currents in disc insulators?
Answer Typical applications Geometry
Given
Task
Results
Engineering question
Set up an axisymmetric QuickField DC Conduction problem for a disc insulator and evaluate thermal effects of leakage current from computed field results.
disc transmission line insulators, porcelain disc insulators, suspension insulators
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Simulation problem
Problem Type
Axisymmetric multiphysics problem of AC Conduction coupled to Heat transfer.
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.
Calculate the thermal effect of the leakage currents in the insulator.
Leakage current density distribution in the insulator (on the left), insulator temperature profile (on the right).
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