基于参数辨识的水中脉冲放电阻抗特性分析

Analysis of Arc Impedance Characteristics of Underwater Pulse Discharge Based on Parameter Identification

通过水中脉冲放电实验获得了实验平台固有参数和不同间隙下典型放电波形,采用电感分量剥离方法得到等离子体通道的时变电阻特性。建立了考虑等离子通道时变电阻的水中脉冲放电等效回路模型,提出了基于粒子群优化(PSO)算法的通道阻抗模型参数辨识方法。计算结果与实验结果对比表明,放电电流波形、阻抗变化特性与实验结果的误差小于3%,基于参数辨识的水中脉冲放电阻抗模型能够指导相关工程应用。

The inherent parameters of the test platform and typical discharge waveforms under different gaps are obtained through the underwater pulse discharge test.The time-varying resistance characteristics of the plasma channel are obtained by the inductive component stripping method.An equivalent circuit model of underwater pulse discharge considering the time-varying resistance of plasma channel is established,and a parameter identification method of channel impedance model based on particle swarm optimization(PSO)algorithm is proposed.The comparison between the calculated results and the experimental results shows that the error between the discharge current waveform and impedance variation characteristics and the experimental results is less than 3%The underwater pulse discharge impedance model based on parameter identification can guide the relevant engineering applications.