激光诱导击穿光谱技术在绝缘子污秽快速定量检测中的应用  

Application of laser-induced breakdown spectroscopy in rapid quantitative detection of insulator contamination

作　　者：顾黎强 钱朝军 孙明刚 张龙 施浩波 GU Liqiang;QIAN Chaojun;SUN Minggang;ZHANG Long;SHI Haobo(State Grid Anhui Electric Power Co.,Ltd.,Construction Company,Hefei 230071,China;State Grid China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]国网安徽省电力有限公司建设分公司,安徽合肥230071 [2]中国电力科学研究院有限公司,北京100192

出　　处：《绝缘材料》2024年第6期96-101,共6页Insulating Materials

基　　金：国家电网公司科技项目(SGFJDKOODWJS2000375)。

摘　　要：为研究激光诱导击穿光谱技术在绝缘子污秽快速定量检测中的应用,提升绝缘子污秽检测精度与速度,本文搭建基于激光诱导击穿光谱技术的检测平台对人工污秽与自然污秽样本进行测试,其中人工污秽样本由NaCl、CaSO_(4)、CaCO_(3)与高岭土混合形成,自然污秽样本则取自南方某地区电网中运行2年与4年的硅橡胶绝缘子,借助自由定标激光诱导击穿光谱方法对绝缘子污秽进行快速定量检测。结果表明:两个人工污秽样本中存在不同比例的9种元素成分,而两个自然污秽样本则分别存在9种和11种不同的元素;经过自吸收校正后,绝缘子污秽元素在玻尔兹曼图中表现为分布点排列整齐、回归线斜率一致、拟合程度高以及各元素的谱线强度明显增强,有效降低了自吸收效应对绝缘子污秽快速定量检测的影响,使检测精度得到提升。In order to investigate the application of laser-induced breakdown spectroscopy(LIBS)technology in rapid quantitative detection of insulator contamination,and improve the accuracy and speed of insulator contamination detection,a detection platform based on LIBS technology was established to test artificial and natural contamination samples.The artificial contamination samples were formulated by mixing NaCl,CaSO_(4),CaCO_(3),and kaolin,while the natural contamination samples were taken from silicone rubber insulators which had been in operation for two and four years in a regional power grid in southern China.The rapid quantitative detection of insulator contamination was carried out by means of the calibration-free LIBS method.The results show that there are 9 kinds of elements with different proportions in the two artificially contaminated samples,while the two naturally contaminated samples contain 9 and 11 distinct elements,respectively.After self-absorption correction,the contaminant elements of the insulators are presented as neatly arranged distribution points on the Boltzmann plot,with consistent regression line slopes,and high fitting degrees,and the spectral line intensities of each element enhances significantly.This effectively mitigates the impact of self-absorption on rapid quantitative detection of insulator contamination,and improves the detection accuracy.

关 键 词：光谱采集 等离子体 污秽成分 自吸收校正 定量检测 激光诱导击穿光谱 

分 类 号：TM216[一般工业技术—材料科学与工程]