Impact of Sunlight and Stand-Off Distance on Detection of Pollution Deposit on Silicone Rubber Insulators Adopting Remote LIBS

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI:10.1109/PowerAfrica52236.2021.9543292

P. Vinod, M. S. Babu, R. Sarathi, N. Vasa, S. Kornhuber

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Abstract

Silicone rubber insulators have been coated with different concentrations of NaCl in order to analyze their pollution performance using LIBS study. Elemental analysis of LIBS spectral peaks has been successful in identifying the sodium peaks, there by indicating the presence of salt deposits. Regression coefficient (R2) has been used as a performance parameter in correlating the ESDD and normalized intensity ratio. A direct correlation between ESDD and the normalized intensity ratio of LIBS spectral data is noticed with a regression coefficient value greater than 0.975 and RMSE value less than 0.07 for all standoff distances in the present study. The percentage reduction in the normalized intensity ratio of the peaks corresponding to Na I in case of morning and mid-day are less than 10% and 20% respectively, compared to night at different ESDD values and different energies of laser pulse. Overall, the LIBS technique is successful in identifying the variations in the salt deposit density on the insulator surface even at far distances of 15 m and at any time of the day.

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用不同浓度的NaCl对硅橡胶绝缘子进行涂覆，用LIBS法分析其污染性能。元素分析的LIBS光谱峰已经成功地确定了钠峰，在那里表明盐沉积的存在。回归系数(R2)被用作ESDD与归一化强度比相关的性能参数。ESDD与LIBS光谱数据的归一化强度比呈直接相关关系，本研究各距离的回归系数均大于0.975,RMSE值均小于0.07。在不同ESDD值和不同激光脉冲能量下，与夜间相比，清晨和正午Na I对应峰的归一化强度比降低的百分比分别小于10%和20%。总的来说，LIBS技术在识别绝缘体表面盐沉积密度的变化方面是成功的，即使在15米的距离和一天中的任何时间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2021 IEEE PES/IAS PowerAfrica

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