126kV双断口快速真空断路器仿真研究

Research on 126 kV double-break fast vacuum circuit breaker

快速真空断路器因其动作速度快、可靠性高、动作分散性小等特点,目前多应用于中低压配用电系统。以一种限制变压器励磁涌流的126 kV双断口罐式结构的快速真空断路器为例,采用有限元仿真研究了其电场、磁场、温度场分布。仿真结果表明,采用罐式双断口结构的快速真空断路器的绝缘性能、磁场分布及通流性能均满足设计要求。

Fast vacuum circuit breakers are widely used in medium-voltage and low-voltage applications,because of their fast velocity,high reliability,low dispersion and so on. A 126 kV double-break tank type fast vacuum circuit breaker is presented to restrain inrush current of transformers. To verify design’s rationality,finite element simulation is conducted,including electric field,magnetic field and thermal field. Simulation results show that insulating property,magnetic distribution and through-current capability satisfy the requirement.