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中文摘要：
为了能有效减小高压直流断路器分闸时产生的电弧,减小对直流开关触头的损伤,延长其使用寿命,提出了一种新型的直流断路器结构.该直流断路器采用包含电力电子器件的电流产生回路,通过适当控制,可产生大小和波形均可变的电流,与故障电流相叠加,在产生人工过零点的同时减小叠加电流的正向幅值.利用Matlab仿真了该直流断路器开断几种故障电流的情况,仿真结果验证了该直流断路器的有效性与可控性.
英文摘要：
In order to effectively decrease the electric-arc operated by high voltage DC circuit breaker （DC CB） and the damage to the switching contact operates, and to improve the service life, a new structure of DC CB is proposed. The current making circuit of this DC CB includes power electronic device, through appropriate control it can produce a current which size and waveform can be changed to superimpose on the DC fault current. When an artificial zero crossing is generated the positive amplitude of the superimposed current can be reduced. The different fault currents of DC CB are simulated with Matlab and the simulated results validate the effectiveness and the controllability.
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