Inductive fault current limiter - QuickField simulation example
This simulation example is prepared by Professor James R. Claycomb as a part of the webinar Fault Current Limiter Simulations using QuickField.
How to calculate fault current in an inductive superconducting current limiter?
Answer Typical applications Geometry
Given
Task Solution
Results
Fault current in an inductive superconducting limiter, showing how the superconducting element changes state when magnetic flux exceeds its critical level.
Engineering question
Model the superconducting layer as a magnetic screen in the normal operating state and remove the screening condition for the fault state, then compare the resulting source current.
inductive fault current limiters, superconducting current limiters, magnetic core limiters
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Simulation problem
Problem Type
Axisymmetric problem of AC magnetics.
Conductor diameter is 1 mm, copper conductivity 59.6 MS/m.
Voltage source 120 V (r.m.s.), frequency 60 Hz.
Calculate the fault current.
Superconductor layer is modelled as an infinitively thin layer with a zero magnetic potential boundary condition.
A maximum possible fault current magnitude is 549 A. The fault current limiter reduces fault current magnitude to 508 A.
Left picture shows the case, when the superconductor is in the superconducting state and fully screens off the secondary winding. Right picture shows a case when the superconductor is in a normal state.
Video
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