Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Hybrid LVDC Circuit Breakers
Authors Hyo-Sung Kim
Page pp.489-497
ISSN 1229-2214
Keywords Hybrid LVDC circuit breaker; Electric contact type switch; Semiconductor switch; Commutation method; Conduction loss; Break arc.
Abstract This work investigates the commutation characteristics of the current flowing through an
electrical-contact-type switch to the semiconductor switch branch during the breaking operation of hybrid DC
switchgear. A simple, reliable, low-cost natural commutation method is proposed, and the current commutation
characteristics are analyzed in accordance with the conduction voltage drop of the semiconductor switch branch
through experiments. A prototype 400 V/10 A class natural commutation type hybrid DC switchgear is set up.
Its performance is verified, and its characteristics are analyzed.