基于激光诱导击穿光谱的绝缘子污秽可溶盐定量关系

doi:10.19595/j.cnki.1000-6753.tces.180132

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摘要绝缘子表面污秽影响高压线路运行安全,现有的绝缘子污秽检测方法主要是取样后在实验室测试其等值盐密和灰密,无法进行现场实时测量。该文利用激光诱导击穿光谱（LIBS）技术,结合电感耦合等离子体光谱等元素分析技术,研究了人工污秽中若干盐类离子含量与激光光谱特征谱线的定量关系,提出了测量输电线路绝缘子污秽成分及浓度的新方法。结果表明,LIBS技术可检测污秽中绝大部分盐类元素含量。其中,Mg、Ca等元素特征谱线对应的含量与光谱相对强度呈现强线性关系,而Na、Al等元素部分谱线对应的可溶盐元素的含量与光谱相对强度的线性关系不明显,碱金属元素Na特征谱线受基体效应的影响较大。通过主成分分析方法分析了多种元素谱线的强度和浓度,实现了不同人工污秽主成分的聚类分析。

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	王乃啸
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关键词 ：绝缘子污秽, 激光诱导击穿光谱, 电感耦合等离子光谱定量关系, 主成分分析

Abstract：The contamination of the insulators’ surface can affect the operation of the high -voltage linerunning state. The detection of the existing insulator contamination relied on sampling in the power cut, taking back to lab and testing with element analysis equipment. Laser-induced breakdown spectroscopy(LIBS) with inductively coupled plasma spectroscopy(ICP) provided a new method for determining the contamination level of transmission line insulators and the quantitative relationship between the content of several salt ions and the laser spectrum in artificial contamination was studied. Results showed that the LIBS could directly monitor the content of the elementsin contamination. Mg, Ca and other elements concentration and spectral intensity of certainlines showed a strong linear relationship, while Na and Al hadno significant linear relationship between the soluble salt elements corresponding to the lines. The alkali metal elements such as Na was greatly affected by the matrix effect. The principal component analysis(PCA) was used to analyze the intensity and concentration of multiple elements. The result was good for classifying different contamination components.

Key words： Insulator contamination laser-induced breakdown spectroscopy inductively coupled plasma spectroscopy quantitative relationship principal component analysis

收稿日期: 2018-01-21 出版日期: 2019-01-31

PACS:

TM85

基金资助:国家自然科学基金（51607101）、深圳市基础研究项目（JCYJ20170817161747745）、电力设备电气绝缘国家重点实验室项目（EIPE17205）和清华大学深圳研究生院交叉研究基金（JC20170003）资助

通讯作者: 王希林,男，1983年生，博士，讲师，研究方向为高电压绝缘技术和工程电介质。E-mail：wang.xilin@sz.tsinghua.edu.cn

作者简介: 王乃啸男,1994年生,硕士研究生,研究方向为基于激光诱导击穿光谱绝缘子污秽定量关系。E-mail：wnx17@mails.tsinghua.edu.cn

引用本文:

王乃啸, 王希林, 贾志东, 王黎明, 黄荣辉. 基于激光诱导击穿光谱的绝缘子污秽可溶盐定量关系[J]. 电工技术学报, 2019, 34(3): 620-627. Wang Naixiao, Wang Xilin, Jia Zhidong, Wang Liming, Huang Ronghui. Quantitative Relationship of Contaminated Soluble Salts of Insulators Using Laser-Induced Breakdown Spectroscopy. Transactions of China Electrotechnical Society, 2019, 34(3): 620-627.

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