Investigation of Interrupting Capability on the New HVDC Circuit Breaker

By analyzing the insufficient interrupting capability about high voltage DC typical circuit breaker in breaking, a resistor connected in parallel to DC circuit is introduced to divide and reduce DC current amplitude of main DC circuit on the basis of its Circuit topology.In addition,a DC breaker is set up in DC circuit which is connected with the resistor in parallel. The breaker could interrupt a small DC and work with the main breaker.Under the joint action,the HVDC new breaker interrupts current of high amplitude of DC.In the Matlab/Simulink circumstances,the Mayr arc model was built and the model of the new DC circuit breaker is obtained.The results of the simulation and its analysis could distinctly show that the new DC circuit breaker has the perfect DC interrupting capability in the HVDC system.