With the development of DC transmission, the reliability requirements of DC transmission system becomes higher. Aiming at how to use the DC circuit breaker with large current to cut off the fault equipment or lines in a few milliseconds in DC power grid, a low loss forced commutation hybrid DC circuit breaker based on the coupling negative pressure circuit and the series connection of electric force electronic switch is proposed. Through the analysis and research of the topological structure principle, the coupling negative pressure circuit can...
