Technical Lecture Session
Fault Protection for Utility Interface Converters
DSP, STFT, Dc Breaker, Arcing
This paper proposes a comprehensive protection scheme for a dc load zone. A coupled-inductor dc breaker design is discussed and simulated to demonstrate its response to step changes in current and shunt faults. An arc detection method based on frequency content of sustained arc is proposed and implemented both on simulation and a low-voltage lab setup. A recursive DFT is used to implement a short-time Fourier transform successfully on a DSP and identify the arc created by a series arcing device. A simulation and experimental system shows the effectiveness of the arc detection scheme with a coupled-inductor dc breaker.