水下冲击大电流间接测量方法研究

分析了水下冲击大电流放电等效回路的微分方程;根据其中的电压方程,采用信赖域算法对测得的储能电容器放电电压波形数据进行数值计算,获得冲击电流的衰减系数,进而通过电流方程间接获得电流波形。该方法不影响脉冲功率装置的工作状态,避免了在水下放电电极之间接入罗科夫斯基线圈而带来的电感额外增加问题;也避免了罗科夫斯基线圈的防水密封问题,获得的电流波形数据反映了脉冲功率装置在水下的真实放电状态,可作为水中等离子物理研究的间接测量手段。

Research on the indirect method measuring large underwater impact current

The thesis analyzes the differential equation describing equivalent circuit, which is charged by large underwater impulse current. Based on the voltage equation and trust region algorithm, the curve data of discharge voltage of energy storage capacity is calculated. So is the attenuation coefficient of impulse current. Then the current curve is gain from current equation. This method does not have any influence on the pulse power device. Avoiding the inductance increase for the insert of the Rogowski coil. The water-proof problem of the coil is beyond worry. It also reflects the true state of pulse power device discharge under water, which can be regarded as a indirect method when measuring the underwater plasma.