Development of a moisture-in-solid-insulation sensor for power transformers

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dc.contributor.author García de Burgos, María Belén
dc.contributor.author Garcia Gomez, Diego Fernando
dc.contributor.author Robles Muñoz, Guillermo
dc.date.accessioned 2019-01-17T10:55:09Z
dc.date.available 2019-01-17T10:55:09Z
dc.date.issued 2015-02-04
dc.identifier.bibliographicCitation García, B., García, D., Robles, G. (2015). Development of a Moisture-in-Solid-Insulation Sensor for Power Transformers. Sensors, 15 (2), pp. 3610-3624.
dc.identifier.issn 1424-8220
dc.identifier.uri http://hdl.handle.net/10016/27927
dc.description.abstract Moisture is an important variable that must be kept under control to guarantee a safe operation of power transformers. Because of the hydrophilic character of cellulose, water mainly remains in the solid insulation, while just a few parts per million are dissolved in oil. The distribution of moisture between paper and oil is not static, but varies depending on the insulation temperature, and thus, water migration processes take place continuously during transformers operation. In this work, a sensor is presented that allows the determination of the moisture content of the transformer solid insulation in the steady state and during the moisture migration processes. The main objective of the design is that the electrodes of the sensor should not obstruct the movement of water from the solid insulation to the oil, so the proposed prototype uses a metallic-mesh electrode to do the measurements. The measurement setup is based on the characterization of the insulation dielectric response by means of the frequency dielectric spectroscopy (FDS) method. The sensitivity of the proposed sensor has been tested on samples with a moisture content within 1% to 5%, demonstrating the good sensitivity and repeatability of the measurements.
dc.description.sponsorship This work has been supported by the Spanish Government under Contract DPI2012-35819.
dc.format.extent 17
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher MDPI
dc.rights © 2015 by the authors; licensee MDPI, Basel, Switzerland.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Dielectric response
dc.subject.other Power transformer
dc.subject.other Moisture
dc.subject.other Solid insulation
dc.subject.other Moisture sensor
dc.subject.other FDS
dc.subject.other Moisture monitoring
dc.title Development of a moisture-in-solid-insulation sensor for power transformers
dc.type article
dc.subject.eciencia Ingeniería Industrial
dc.subject.eciencia Materiales
dc.identifier.doi https://doi.org/10.3390/s150203610
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. DPI2012-35819
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 3610
dc.identifier.publicationissue 2
dc.identifier.publicationlastpage 3624
dc.identifier.publicationtitle Sensors
dc.identifier.publicationvolume 15
dc.identifier.uxxi AR/0000016849
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