新型高压直流断路器开断能力的研究

通过对典型高压直流断路器在开断大大直流时开断能力不足的问题的分析,在其电路拓扑的基础之上,引进了一个电阻元件,将该电阻直接并联于直流回路上,用于分流和减小直流电流的幅值。另外,在与该电阻元件并联的直流回路上设置了一台断路器装置,该装置能开断较小容量的直流回路,它能与主直流回路的断路器共同工作,最终开断大幅值直流电流。在Matlab/Simulink环境下,建立Mayr电弧模型,并在此基础上建立了新型高压直流断路器模型。通过仿真及其分析,表明在高压直流系统中,该新型直流断路器具有很好的直流开断能力。

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.