Novel capacitive proximity sensors for assessing the aging of composite insulators
Novel capacitive proximity sensors for assessing the aging of composite insulators
复制标题
用于评估复合绝缘子老化的新型电容式接近传感器
DOI：
10.1016/j.sna.2016.11.025
复制
发表时间：
2017-01-01
影响因子：
4.6
通讯作者：
He, Cunfu
中科院分区：
文献类型：
--
作者：
Jiao, Jingpin;Li, Liang;He, Cunfu
提出了一种用于评价变厚度硅橡胶棚老化的新型电极结构--变间距叉指电极（VS-IDE）。通过数值模拟和实验研究了指数、单元宽度和金属化率对传统叉指电极结构传感器信号强度和穿透深度的影响。根据穿透深度与单元宽度之间的关系，分别优化了VS-IDE结构传感器的各指宽度，以将电场线限制在待测裙内。实验结果表明，与其他传感器相比，优化的传感器具有高振幅，高灵敏度，以及良好的稳定性对环境湿度的影响。开发的电容式接近传感器已被用于评估硅橡胶伞裙在复合绝缘子中的老化，并证明了通过定量电容技术评估绝缘劣化的可行性。(C)© 2016 Elsevier B. V.版权所有。
A novel electrode structure consisting of a variable spacing interdigital electrode (VS-IDE) was proposed for assessing of the aging of silicone rubber sheds with variable thickness. A series of numerical simulations and experiments have been carried out to investigate the influences of finger number, unit width, and metallization ratio on the signal strength and penetration depth of sensors with a traditional inter digital electrode structure. According to the relationship between the penetration depth and the unit width, the width of each finger that composed the VS-IDE structure sensor was optimized individually to confine the electric field line within the sheds under test. Experimental results showed that compared to the other sensors, the optimal sensor exhibited high amplitude, high sensitivity, and excellent stability against the effects of environmental humidity. The developed capacitive proximity sensors have been used for assessing of the aging of silicone rubber sheds in composite insulators, and the feasibility of assessing insulation degradation by quantitative capacitive techniques is demonstrated. (C) 2016 Elsevier B.V. All rights reserved.