Open AccessCascaded commutation circuit for a hybrid DC breaker with dynamic control on fault current and DC breaker voltage
Author(s) -
Shan Yunhai,
Lim Tee C.,
Finney Stephen J.,
Guang Weixiao,
Williams Barry W.,
Holliday Derrick,
Ding Xiao
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2016.0472
Subject(s) - circuit breaker , commutation , transient recovery voltage , snubber , fault (geology) , waveform , current (fluid) , voltage , control theory (sociology) , prospective short circuit current , electrical engineering , transient (computer programming) , fault current limiter , electronic circuit , engineering , computer science , short circuit , capacitor , physics , voltage source , control (management) , electric power system , power (physics) , dropout voltage , led circuit , operating system , quantum mechanics , artificial intelligence , seismology , geology
This study proposed a cascaded commutation circuit based on current commutation approach for low‐ to medium‐voltage DC fault current interruption, without snubber circuits, which slows the fault current d i /d t prior to current‐zero and the rate of rise of the transient recovery voltage d v /d t across the mechanical breaker contacts after current‐zero. The proposed dynamic control of the fault current d i /d t and circuit breaker voltage d V VCB /d t increase the fault current interruption capability at the first and second current‐zeros. Detailed mathematical equations are presented to evaluate the operational waveform profile and the validity of the cascaded commutation principle is confirmed by simulation and experimental results at 600 V dc , 110 and 330 A.