微秒脉冲电压下2MV电容耦合自触发开关设计

Design of a 2MV Capacitance Coupling Self-Triggered Switch Under Microsecond Pulse

提出了一种可用于微秒脉冲电压下的2 MV电容耦合自触发开关模式,该开关具有结构简单、高可靠性等特点。通过电场分布计算及电路计算得到开关关键绝缘参数和电路参数。计算结果表明,设计触发间隙电压为主间隙电压的1.21%,该开关主间隙场不均匀系数为1.64,开关在0.7 MPa的SF6气体中工作电压为2.27 MV。

In this paper , a 2 MV s^el--triggered switch withcapacitance coupling circuit ispresented under the microsecond pulse. The switch has a simple structure and a high reliability.Based on the electric field strength and circuit simulation, some key configurations andcircuit parameters areobtained. The calculation results show that th ev o ltag eo f designedtriggered gap accounts for 1 . 2 1 % of the main gap, and the nonuniform factor of the maingap is 1.64, the breakdown voltage of the sel--tri ggered gap i s about 21 kV when the maxi -mum working voltage of the switch s 2.27 MV a^t "the air pressure o f 0.7 MPa.