Disc insulator leakage current
Heating produced by leakage current in a disc insulator on a transmission line, and the resulting temperature distribution inside the insulator material.
Engineering Problem
How can the thermal effect of leakage current be found in a disc insulator?
Answer
Use an axisymmetric multiphysics problem coupling AC Conduction with heat transfer to compute the thermal effect of leakage current in the insulator.
Typical Applications
- Transmission line disc insulators
- Porcelain disc insulators
- Suspension insulators
Simulation Problem
- Problem Type
- Axisymmetric multiphysics: AC Conduction coupled with steady-state heat transfer
- Geometry
- Cement, porcelain, metal cap, pollution layer and coupling link.
- Given
- Porcelain relative permittivity ε = 6
- Cement relative permittivity ε = 2
- Pollution layer thickness 1 mm
- Pollution layer conductivity 30 μS/cm
- Porcelain thermal conductivity 1.4 W/(m·K)
- Air temperature +20°C, convection coefficient α = 10 W/(m²·K)
- Task
- Compute the thermal effect of leakage current in the insulator.
- Results
The leakage current density distribution (left) and temperature distribution (right) inside the insulator are obtained.
