摘要
为了研究绝缘油中击穿放电通道参数演化过程,搭建了绝缘油中放电发射光谱诊断平台,通过实验得到绝缘油中微秒级击穿放电过程的典型发射光谱和时间演化发射光谱,分别使用Stark展宽法和Boltzmann点法对绝缘油中放电等离子体通道的电子数密度和电子温度时间演化特性进行诊断。从绝缘油中放电击穿的典型发射光谱中可观察到H_(α)谱线、C_(2)斯旺带和电极金属原子发射谱线。对比放电电流波形与时间演化发射光谱可发现电流强度与光谱强度呈正相关。放电等离子体通道参数诊断结果表明:电子数密度在放电1~2μs时达到峰值1.12×10^(18)cm^(-3),18μs后稳定在10^(17)cm^(-3)量级;整个放电过程电子温度在7000~8200K范围内波动,总体呈上升趋势;根据参数诊断结果可判断绝缘油中放电等离子体通道处于局部热力学平衡状态。
In order to study the evolution process of discharge channel parameters in insulating oil,a diagnostic platform for discharge emission spectrum in insulating oil was built.The typical emission spectrum and time evolution emission spectrum are obtained through experiments.The Stark broadening method and the Boltzmann point method are used to diagnose the time evolution characteristics of electron density and electron temperature of discharge plasma channel in insulating oil.The typical plasma spectra show a strong Hα,C_(2) Swan bands and lines emitted by coming from electrodes materials.Compared the discharge current waveform with the time evolution emission spectrum,it can be found that the current intensity is positively correlated with the spectral intensity.The diagnostic results of discharge plasma parameters show that the electron density peaks at 1.12×10^(18) cm^(-3) at 1~2μs and stabilizes at 10^(17) cm^(-3) after 18μs.The electron tem-perature fluctuates in the range of 7000~8200 K during the whole discharge process and generally shows an upward trend.According to the parameters diagnosis results,it can be judged that the discharge plasma in insulating oil is in the state of local thermodynamic equilibrium.
作者
郭凯航
章程
孙建涛
陈根永
李金忠
邵涛
GUO Kaihang;ZHANG Cheng;SUN Jiantao;CHEN Genyong;LI Jinzhong;SHAO Tao(School of Electrical and Information Engineering,Zhengzhou University,Zhengzhou 450001,China;Beijing International S&T Cooperation Base for Plasma Science and Energy Conversion,Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;China Electric Power Research Institute,Beijing 100192,China;State Grid Corporation of China,Beijing 100031,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2024年第7期3191-3198,共8页
High Voltage Engineering
基金
国家电网有限公司总部科技项目(5108-202218280A-2-365-XG)。
关键词
绝缘油
发射光谱
放电等离子体
电子数密度
电子温度
insulating oil
optical emission spectra
discharge plasma
electron density
electron temperature
