Modelling and Testing of Saturated Core Fault Current Limiter

Abstract

A fault current limiter (FCL) is a nonlinear device with negligible impedance under normal conditions which is able to switch to a high impedance state as soon as the current passing through it exceeds a given threshold.Among the various FCL topologies, saturated core fault current limiters have recently reached the demonstration phase in medium to high-voltage networks. ASG Power Systems has manufactured and tested a 36kV rated saturated core type fault current limiter (FCL). The Paper presents a sophisticated coupled-circuit model of the limiter and compares the model results with the results of full-scale testing of the limiter.