As the transmission capacity of electric energy get larger, the transmission distance of electric energy get longer, the characteristics of weak damping and low inertia in high-voltage DC and ultra-high-voltage DC transmission network get more serious. HVDC circuit breaker has become one of the key technologies of HVDC and UHVDC power grid. This paper presents a hybrid HVDC circuit breaker based on capacitive current limiting, which has good fault current breaking ability, can restrain the rapid rise of fault current, and reduce the number of fully controlled switch IGBTs. Firstly, the topology of the hybrid DC circuit breaker based on capacitive current limiting was introduced in detail. Then the principle of blocking short circuit current was described. Finally, the simulation model of the circuit breaker was built on the simulation platform PSCAD, and the simulation results show that the breaker can quickly block the fault current and restrain the arc.
capacitor current limitingfault currenthybrid high voltage circuit breaker
维普
万方数据
