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为了优化中性束注入器(NBI)用高压缓冲器的布局,分析了缓冲器结构设计参数和缓冲器性能的相互关系,并通过等效电路仿真模型修正了缓冲器放电峰值电流经验公式,得到了不同激励信号下串联高压缓冲器在高频脉冲放电情况下的特性,最后,在高压缓冲器理论分析和仿真分析的基础上,对设计的非晶缓冲器和Deltmax缓冲器串联高压测试件进行了短路放电测试,得到了短路放电瞬间串联缓冲器的分压和回路的放电电流。放电实验结果表明,黑色非晶缓冲器感应电压频率响应比较快,Deltmax缓冲器可以消耗更多的故障电流能量,非晶缓冲器和Deltmax缓冲器这2种不同直流缓冲器的串联能够有效地抑制高压直流故障短路电流并吸收故障电能。
In order to optimize the layout of high-voltage buffer for neutral beam injector (NBI), the relationship between the design parameters of buffer and the performance of buffer is analyzed. The empirical formula of peak discharge current of buffer is modified by the equivalent circuit simulation model, Finally, based on the theoretical analysis and simulation analysis of the high-voltage buffer, the design of the amorphous buffer and the Deltmax buffer series high-voltage test pieces were carried out A short-circuit discharge test was performed to find the partial pressure of the series short-time discharge and the discharge current of the loop. The experimental results of discharge show that the response frequency of black amorphous buffer is faster and the Deltmax buffer can consume more fault current energy. The series connection of amorphous buffer and Deltmax buffer can effectively restrain High-voltage DC fault short-circuit current and absorb fault power.