Abstract
The on line diagnostic of high voltage insulators, used in overhead lines, has proved a powerful tool to detect and prevent the failure of such components. Among the many diagnostic techniques, E-field sensors have been extensively used to assess the presence of surface or internal defects. Electric field sensors are mostly based on capacitive metallic gauges, which induce a significant electric field distortion and may pose a threat to live line workers who perform the measurement. In this work, we introduce a new class of electric field sensors that are fully dielectric. The sensor is capable of measuring the modulus and the direction of the electric field in a plane with a high rejection of the components orthogonal to that plane in a very broad frequency interval.
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Acknowledgments
This work has been financed by the Research Found for the Italian Electrical System under the Contract Agreement between RSE and the Ministry of Economic Development. The authors wish to thank L. Barbareschi for her valuable contribution and suggestions.
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Villa, A., Barbieri, L., Malgesini, R. (2020). Insulator Diagnostics Through a Dielectric E-Field Sensor. In: Németh, B. (eds) Proceedings of the 21st International Symposium on High Voltage Engineering. ISH 2019. Lecture Notes in Electrical Engineering, vol 598. Springer, Cham. https://doi.org/10.1007/978-3-030-31676-1_41
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DOI: https://doi.org/10.1007/978-3-030-31676-1_41
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