摘要
液中大电流脉冲放电电弧通道阻抗与外回路阻抗的关系决定了注入通道能量的速率与大小,进而影响电能向机械能等能量形式的转换效率。为此建立了液中大电流脉冲放电电弧阻抗特性测试平台,通过间隙两端电压、电流中电感分量的剥离,获得了不同间隙参数下的电弧通道阻抗特性。建立改进的Braginskii-Martin液中电弧阻抗模型,并提出了模型参数的选取方法。试验与计算结果对比表明,改进的电弧阻抗模型能够合理表征电弧阻抗的时变特性。对于幅值为22 kA、周期为22μs的脉冲电流,水中电弧通道单位长度阻抗约为0.01Ω/mm。
The rate and magnitude of the energy injected into the channel are determined by the relationship between the impedance of high current pulse discharge arc channel in liquid and the impedance of the outer loop,which in turn affects the conversion efficiency of electrical energy to mechanical energy and other energy forms.A test platform for high current pulse discharge arc impedance characteristics in liquid was established.By stripping the inductance component of the voltage and current between the discharge gaps,the impedance characteristics of the arc channel under different gap parameters were obtained.An improved Braginskii-Martin arc impedance model was established,and a method for selecting model parameters was proposed.The comparison between the test and the calculation results shows that the improved arc impedance model can reasonably characterize the time-varying characteristics of the arc impedance.For a pulse current with an amplitude of 22 kA and a period of 22μs,the impedance per unit length of the arc channel in water is about 0.01Ω/mm.
作者
刘毅
黄仕杰
赵勇
林福昌
任益佳
LIU Yi;HUANG Shijie;ZHAO Yong;LIN Fuchang;REN Yijia(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science&Technology,Wuhan 430074,China;Key Laboratory of Pulse Power Technology,Ministry of Education,Huazhong University of Science&Technology,Wuhan 430074,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2021年第7期2591-2598,共8页
High Voltage Engineering
基金
国家自然科学基金(51877095)。
关键词
液电效应
电弧通道
时变电感
时变电阻
电弧通道时变阻抗模型
electro-hydraulic effect
arc channel
time-varying inductance
time-varying resistance
arc channel time-varying impedance model
