桥式多端口直流断路器可靠性分析OA

As a critical device for isolating DC line faults in multi-terminal DC grids,the reliability of multiport DC circuit breakers directly impacts the overall reliability of the power grid.To quantitatively e-valuate the reliability of bridge-type multi-port DC circuit breakers,this paper proposes a Markov process-based reliability modeling and assessment method.Case studies are conducted to reveal the quantitative relationship between redundancy levels of key components and reliability indicators.Firstly,the topologi-cal structure and operational principles of bridge-type multi-port DC circuit breakers are elaborated.Sec-ondly,a reliability model based on the Markov process is established,and the calculation method for steady-state probability is derived.Finally,case verification is conducted on a three-port bridge-type cir-cuit breaker.By computing steady-state probability metrics,the effects of key component redundancy on equipment reliability are systematically analyzed,which validates the correctness and effectiveness of the proposed model.