A hybrid HVDC circuit breaker can integrate advantages of mechanical circuit breaker and solid state circuit breaker,and can improve the operation reliability and safety of high voltage and ultra-high voltage DC trans-mission and distribution network.In order to limit the rise rate of fault current,it is usually necessary to limit the fault current by reactance or capacitance.A topology of hybrid HVDC circuit breaker based on capacitor current limiting is presented in this paper.The circuit breaker adopts the mode of capacitor current limiting,which can real-ize the overcurrent protection of DC network.The overvoltage protection of DC network is realized by lightning ar-rester.In this paper,the simulation model of the hybrid HVDC circuit breaker is built by using PSCAD.The simula-tion results show that the circuit breaker can quickly block the fault current and restrain the rise rate of the fault current by using capacitance.
关键词
混合式高压直流断路器/故障电流/工作特性/电容限流
Key words
hybrid HVDC circuit breaker/fault current/operating characteristics/capacitance current limiting
维普
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