Resonance of a distribution feeder with a saturable core fault current limiter

Simulations of a resonance event were performed based on actual field data of a commercially operating distribution feeder and a superconducting saturable core fault current limiter. The analysis was conducted from both the system´s and the fault current limiter´s perspectives. Agreement in the results of the two approaches showed that under certain values of reactive shunt compensation, full insertion of the limiter´s reactance, and low load conditions, a sustained but damped resonance can occur. Resonance suppression preventive measures for these conditions are proposed.