【摘要】 真空电弧电流转移是自然换流型混合式直流断路器开断过程中的一个重要组成部分。文中通过建立真空电弧电流转移的理论分析模型，得出影响真空电弧电流转移的主要因素为真空电弧电压、内部杂散电阻电感参数和电力电子器件的串并联结构。实验方面，通过改变电力电子开关中电力电子器件的串联或并联个数研究了电力电子器件的串并联结构对真空电弧电流转移特性的影响，通过改变电力电子开关中杂散电感或电阻的数值和所处位置研究了内部杂散电阻电感参数对真空电弧电流转移特性的影响。最后，探究了促进电弧电流转移的方法。本研究将为混合式直流断路器的结构设计和参数优化提供理论依据。更多还原

【Abstract】 Vacuum arc current commutation is an important part in the interruption process in natural commutated hybrid DC circuit breaker(NHCB). In this paper,it is concluded through setting up the vacuum arc current commutation model of NHCB that the main factors influencing vacuum arc current commutation are vacuum arc voltage,internal stray resistance and inductance parameters and the series-parallel structure of power electronic devices.From the point of view of experiment,the influence of series-parallel structure of power electronic devices on the characteristics of arc current commutation is studied by changing the number of power electronic devices in series or parallel in the power electronic switch,and the influence influence of internal stray resistance and inductance parameters on the characteristics of arc current commutation is studied by changing the value and position of stray inductance or resistance in power electronic switches. Finally,the method to promote arc current commutation is explored. This research can provide theoretical foundation for the structure and parameter optimization of NHCB.更多还原