The Main Component Content Detecting Method of Silicone Rubber in Aging Process Based on Terahertz Spectrum Characteristics

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI:10.1109/ICHVE53725.2022.9961688

Lei Wang, H. Mei, Shushan Wang, J. Liu, Dabing Chen, Liming Wang

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Abstract

The aging of composite insulators seriously affects the safety and stability of power systems. Thus, detecting the aging of the insulation materials by reliable methods is of great significance in reducing insulation failures. According to the Beer-Lambert law and considering the influence of nonlinear factors, the relationship between the absorption spectrum of high temperature vulcanized silicone rubber (HTVSR) in terahertz band and the contents of its main ingredients (polydimethylsiloxane (PDMS), alumina trihydrate (ATH), and silica) is modeled with the last-square support-vector-machine (LS-SVM) regression method. Then, the aging of HTVSR can be evaluated based on the contents of the main ingredients. Experimental results of both artificial thermal oxygen aging samples and actual insulator samples showed that the ATH content of HTVSR decreases significantly with aging. It is feasible to characterize the aging of HTVSR by detecting the contents of its main ingredients content based on the terahertz spectrum.

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基于太赫兹光谱特性的硅橡胶老化过程中主要成分含量检测方法

复合绝缘子的老化严重影响着电力系统的安全稳定运行。因此，采用可靠的方法检测绝缘材料的老化对减少绝缘失效具有重要意义。根据比尔-朗伯定律，考虑非线性因素的影响，采用最后平方支持向量机(LS-SVM)回归方法，建立了高温硫化硅橡胶(HTVSR)在太赫兹波段的吸收光谱与其主要成分聚二甲基硅氧烷(PDMS)、三水合氧化铝(ATH)和二氧化硅含量之间的关系。然后，根据主要成分的含量来评价HTVSR的老化程度。人工热氧老化样品和实际绝缘子样品的实验结果表明，HTVSR的ATH含量随着老化而显著降低。利用太赫兹光谱检测HTVSR主要成分含量来表征其老化是可行的。

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2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)

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