基于激光诱导击穿光谱的绝缘子污秽自由定标定量分析

污秽闪络严重威胁着输电线路的正常运行。传统的污秽监测方法需停电取样分析，耗时长，不利于及时给出运维方案。利用激光诱导击穿光谱技术（LIBS），结合自由定标（CF）方法，以10组不同含量的Na和Ca人工污秽样品为研究对象，实现了对污秽的定量分析。结果表明，在经过自吸收校正后，人工污秽样品玻尔兹曼图中回归线相关系数均有所提高；Na人工污秽样品定量分析的相对误差在20%左右，Ca人工污秽样品定量分析的相对误差在15%左右。

Calibration-free Quantitative Analysis of Insulator Pollution via Laser-induced Breakdown Spectroscopy

Pollution flashover seriously threatens the normal operation of transmission lines. The traditional pollution monitoring method requires the sampling and analysis during power outage，which takes a long time and is not beneficial to the timely delivery of the operation and maintenance scheme. 10 groups of artificial contamination samples with different contents of Na and Ca are studied by laser-induced breakdown spectroscopy（LIBS）combined with free calibration. The results show that after self-absorption correction， the correlation coefficients of regression lines in the Boltzmann diagram of artificial pollution samples are increased. The relative error of the quantitative analysis of Na artificial pollution samples is about 20%， and that of Ca artificial pollution samples is about 15%.