染污绝缘表面交流电弧发射光谱及等离子体特性研究  

Study on AC Arc Discharge Characteristics Over the Polluted Insulation Surface Using Optical Emission Spectroscopy

作　　者：杨昊[1] 张乔根[1] 庞磊[1] 杨晓磊[1] 周军[2] 于昕哲[2] 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049 [2]中国电力科学研究院,北京市海淀区100192

出　　处：《中国电机工程学报》2015年第18期4808-4816,共9页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2011CB209406)~~

摘　　要：为了进一步深入认识绝缘子污秽闪络过程及机制,设计了电弧等离子体光学诊断实验平台,通过在污秽中掺入了微量锂元素作为示踪元素,并基于染污绝缘表面交流电弧发射光谱测量及特性分析,获得了不同泄漏电流下电弧等离子体的谱线分布和微观参数。利用谱线相对强度法,计算了电弧温度;通过分析钠元素分立谱线Stark半展宽值,获得了电弧通道的电子密度。实验结果表明:随着泄漏电流幅值的增加,局部电弧的温度升高、电子密度并没有显著变化;在临界闪络阶段,电弧等离子体的电子密度骤增;闪络发生时,电弧温度达到7 400 K,电子密度升至7.64×1017cm-3。In order to investigate the characteristics of AC arc discharge on the polluted insulation surface, a spectroscopy experimental system was designed. The lithium chloride was added in the artificial pollution to introduce lithium as the indicator element in the analysis of arc emission spectroscopy. Based on the emission spectroscopy of arc discharge, the characteristics of partial arc plasma were investigated. Excitation temperature was measured by employing the relative line intensities method, and the electron density was determined by analyzing the Stark-broadening values of the profiles. It was indicated that excitation temperature of partial arc increased with the leakage current value, but electron density of partial arc barely changes with leakage current. The electron density of arc column increased sharply with the increase of excitation temperature when the flashover was approaching. At the moment of flashover, the excitation temperature reached 7400K, and the electron density was about 7.64x10^17cm-3.

关 键 词：染污绝缘表面 交流电弧 光谱 电弧温度 电子密度 

分 类 号：TM85[电气工程—高电压与绝缘技术]