中文摘要：

利用真空间隙串联CO2气体间隙组成混合断路器可补偿CO2气体灭弧能力较差的缺点,使CO2气体间隙获得接近SF6气体间隙的开断能力。为分析混合断路器各间隙的电位分布,搭建了5种不同布置方式的混合断路器模型,并利用ANSYS Workbench计算不同布置方式下混合断路器各间隙的电场分布。同时利用子模布型技术解决了模型计算量过大的问题,得到了不同布置方式下真空间隙与CO2气体间隙的分压情况。分析仿真结果并综合考虑各因素,气体间隙在上且与真空间隙呈45°角的布置方式最为符合混合断路器的要求。最后,进行等效电容计算并分析了并联电容对各间隙分压的影响。仿真和计算结果可为混合断路器的结构设计提供参考与依据。

英文摘要：

The electric field distributions inthe vacuum and CO2 gaps connected in series of the hybrid circuit breaker were empirically approximated with equivalent circuits, mathematically modeled, and numerically simulated with software AnsysWorkbench. The impact of the different alignments of the vacuum and CO2 gaps, and parallel- connected capacitors on the field distributions was investigated. The simulated results show that two alignmentsbest meet the circuit-breaker＇ s requirements for the static field distributions ： I-alignment with a top CO2 gap and V-a- lignment with the vacuum gap tilted 45° clockwise from the vertical CO2 gap. The equivalent capacitance and de- pendence of the gap voltages on the shunt capacitance were also calculated. We suggest that the simulated and calculated results be of some technological interest in design optimization of hybrid circuit breaker.