CAJ | 학술논문

基于IGBT的直流断路器存在导通损耗高、开断过程耗能量大的缺点，传统基于人工过零技术的直流真空断路器难以实现短路大电流的可靠开断。提出了一种综合了“零电压”、“零电流”混合开断原理，同时结合机械开关和半导体开关优点的新型混合式直流断路器方案。该直流断路器能够快速可靠地完成“零电压”电流转移过程，并通过晶闸管短时导通短路电流，确保机械开关弧后介质的可靠恢复，实现断路器的成功开断。样机等效短路电流开断试验结果表明，该新型混合式直流断路器能够用于电力系统配网完成预期10 kV/50 kA短路电流的开断。
기우IGBT적직류단로기존재도통손모고、개단과정모능량대적결점，전통기우인공과령기술적직류진공단로기난이실현단로대전류적가고개단。제출료일충종합료“령전압”、“령전류”혼합개단원리，동시결합궤계개관화반도체개관우점적신형혼합식직류단로기방안。해직류단로기능구쾌속가고지완성“령전압”전류전이과정，병통과정갑관단시도통단로전류，학보궤계개관호후개질적가고회복，실현단로기적성공개단。양궤등효단로전류개단시험결과표명，해신형혼합식직류단로기능구용우전력계통배망완성예기10 kV/50 kA단로전류적개단。
The weakness of the DC circuit breaker scheme based on IGBT lies in relatively higher on-state loss and more energy ab-sorbed in the breaking process, while the traditional DC vacuum circuit breaker scheme based on forced current commutation technolo-gy could not interrupt large short circuit current reliably. A novel hybrid DC circuit breaker based on a“zero voltage” and“zero cur-rent” hybrid breaking principle is proposed in this paper, which combines the advantages of mechanical switches and power semicon-ductors. The novel circuit breaker could finish the current commutation quickly and reliably in the “zero voltage” process, and then conduct the short circuit current by the thyristor, enabling the switch achieve the dielectric recovery reliably, making the DC current in-terrupted successfully. Equivalent current breaking test results of the breaker prototype indicate that the novel hybrid DC circuit breaker is able to interrupt the prospective 10 kV/50 kA short circuit current in the real system.