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

Abstract

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.