Open AccessHybrid DC Circuit Breaker with Integrated Self-charging and Current Limiting
Author(s) -
Jun Wang,
Sumin Pang,
X. Wu,
Yilin Zhong,
Kang Qiong,
Chuangchuang Tao
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 - 10.1088/1742-6596/2213/1/012022
Subject(s) - circuit breaker , electrical engineering , capacitor , current limiting , voltage drop , voltage , power (physics) , arc fault circuit interrupter , charge pump , interrupter , distribution board , inductor , recloser , engineering , short circuit , physics , quantum mechanics
With the rapid development of DC power systems in recent years, more stringent requirements have been put forward for the fast reliability of DC circuit breakers. At present, in the medium voltage DC circuit breaker, the mechanical switch commonly uses an external secondary power supply to charge the mechanism drive capacitor, which has the problems of large breaker size and high cost. In this paper, we propose a DC circuit breaker topology that uses short-circuit current to charge the mechanism drive capacitor of the mechanical switch. When the short-circuit current rises, a voltage drop is formed across the series inductor, and this voltage charges the drive capacitor in parallel through a diode, avoiding the use of a secondary power supply to charge the drive capacitor and reducing the complexity of the DC circuit breaker system. The operating principle of the circuit breaker is analysed and the rationality of the proposed scheme is verified by simulation calculations.