Open AccessA Novel DC Circuit Breaker with Fast Breaking Capability in Full Current Range
Author(s) -
Xin Zhao,
Jun Wang,
Yawen Wang,
Qiong Kang,
Long Chen,
Jaming Shen
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2213/1/012028
Subject(s) - circuit breaker , capacitor , electrical engineering , current (fluid) , interrupter , current limiting , capacitance , short circuit , fuse (electrical) , parasitic capacitance , arc fault circuit interrupter , power (physics) , engineering , voltage , physics , electrode , quantum mechanics
With the rapid development of DC power system in recent years, more stringent requirements have been put forward for the rapid reliability of DC circuit breakers. At present, most hybrid circuit breakers widely used create artificial zero crossing by injecting current opposite to short-circuit current. However, when it comes to the small current, the injected current may reverse puncture the contacts of the high-speed mechanical switch. And this results in the difficulty of extinguishing the arc between the contacts of the high-speed mechanical switch during disconnection, prolonging the disconnection time and adversely affecting the system. This paper presents a double break DC circuit breaker structure based on double capacitor structure. In the process of current breaking, the capacitor with small capacitance is used to commutate for small current, and the double capacitor parallel method is used to complete the current transfer for large current. The working principle of the circuit breaker is analysed, and the appropriate parameters are selected through simulation.