一种用于监测变压器压板含水率的三波长柔性传感器

[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials Pub Date : 1991-07-08 DOI:10.1109/ICPADM.1991.172310

P.A. von Guggenberg, J. Melcher

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引用次数: 15

摘要

研制了一种用于测量变压器压板非均质特性的三波长互指柔性传感器。施加的空间波长为1mm、2.5 mm和5mm，时间频率为0.005 Hz ~ 10000hz。由于电场的穿透深度约为波长的1/5，因此该传感器可用于观察变压器压板介电损耗的时空变化。实验结果表明，测得的响应对压板含水率的变化很敏感。此外，该传感器还可用于监测压板吸收水分的时间函数。该测量提供了室温下无油变压器压板中水分扩散系数的估计值，为3.5*10/sup -11/ sup /sup 2/ s.>

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A three-wavelength flexible sensor for monitoring the moisture content of transformer pressboard

A three-wavelength interdigitated flexible sensor has been developed for measuring the heterogeneous properties of transformer pressboard. The imposed spatial wavelengths are 1 mm, 2.5 mm, and 5 mm, and the temporal frequency ranges from 0.005 Hz to 10000 Hz. Because the penetration depth of the electric field is approximately 1/5 of the wavelength, the sensor can be used to observe spatial as well as temporal changes in the dielectric loss of transformer pressboard. Experimental results indicate that the measured response is sensitive to changes in the moisture content of the pressboard. In addition, the sensor can be used to monitor the absorption of moisture into pressboard as a function of time. This measurement provides an estimate of the diffusion coefficient of moisture in oil-free transformer pressboard at room temperature of 3.5*10/sup -11/ m/sup 2//s.<>

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[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials

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