【摘要】 介绍了一种支路可插拔的兆安级气体绝缘直线变压器驱动源模块及其触发方式，分别设计了B-dot和D-dot 2种探头，实验研究了该触发方式下模块中开关闭合的时间分散性。研究结果表明：与D-dot探头相比，带时间积分的B-dot探头能更清楚地反映开关闭合时间；相同工作电压下，随着工作系数增加，各开关触发时延减小，抖动减小；当充电电压为±80 kV,工作系数大于60%时，模块各开关抖动小于5 ns;当开关闭合时间分散性为2.2～13.3 ns时，模块的输出电流约为(840±4.6) kA,负载电流上升前沿为(126±1) ns。基于支路放电电流波形的分析，单支路电感为175.8 nH,该支路与其他支路总互感约为22.5 nH。由于支路之间的互感不可忽略，开关闭合时间不一致时，各支路放电波形并不相同。更多还原

【Abstract】 A gas-insulated MA-class linear transformer driver(LTD) cavity with pluggable bricks and its trigger mode are introduced. Two probes, B-dot and D-dot, are designed respectively to study close dispersion in the module of switches in the LTD cavity. The results show that compared with the D-dot probe, the B-dot probe with time integration can more clearly reflect the switch closing time. Under the same operating voltage, with the increase of operating coefficient, the trigger delay and jitter of each switch decreases. when the LTD cavity operates at the charging voltage of ±80 kV, the output peak current of the LTD cavity is about(840±4.6) kA and the rise time is(126±1) ns when the switch closure dispersion rises changes from 2.2 ns to 13.3 ns. The jitter of each switch is less than 5 ns while the operating coefficient is greater than 60%. Based on the analysis of the current waveform of each brick, the inductance of the brick is 175.8 nH, and the total mutual inductance between this brick and other bricks is about 22.5 nH. As the mutual inductance between bricks can not be ignored, when the switch closing time is different, the discharge current waveform of each brick is different.更多还原