EMTP modeling of hybrid HVDC breakers

HVDC meshed systems offer several advantages in front of their HVAC counterparts. However, the lack of fast, low-losses and reliable circuit breaker technology has postponed their implementation. A recently proposed hybrid breaker design can alter this situation. The new hybrid HVDC breaker offer a fast low-loss operation that can be easily adapted to high-power high-voltage DC applications. This paper presents the implementation and testing of an HVDC breaker model based on the new design. Simulation results are included to illustrate the operation of the new device when running as a fault-current limiter.