Simple capacitor dielectric sensors for determination of water content in transformer oil

  • Abstract
  • Keywords
  • References
  • PDF
  • Abstract

    In this paper, two electrode dielectric sensors for evaluation of water content in transformer oil are presented. Several setup and design were investigated. Parallel plate electrode was the most optimum design. The first sensor could be used for lab testing of transformer oil while the second sensor designed to be used for online and in-situ testing. Validation and calibration standard procedures were developed for both electrode dielectric sensors. The calibration and validation standard were performed to improve the accuracy of the sensors for measuring dielectric properties of the transformer oil. The results of the dielectric constant and loss factor of transformer oil containing different amount of water content were evaluated. The results of dielectric properties also evaluated and measured in the frequency range from one kHz to one MHz. The results of complex permittivity of transformer oil show that the real and imaginary part (dielectric constant ε' and loss factor ε'') of transformer oil raise with increasing oil water content while both real and imaginary parts decline with increasing operating frequency. The dielectric sensor shows its capability to determine the water content in transformer oil and could be used for quality control of oil.


  • Keywords

    Capacitor; Dielectric properties; Sensor; Transformer oil; Water content.

  • References

      [1] Wang SQ, Zhang GJ, Suwarno MHB, Tanaka Y & Takada T, (2012), Effects of paper-aged state on space charge characteristics in oil impregnated paper insulation, IEEE Transactions on Dielectrics and Electrical Insulation, 19 (6), 1871-1878.

      [2] Suwarno MHP, (2015), Effects of Water Content on Dielectric Properties of Mineral Transformer Oil, International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering 9 (10), 1138-1142.

      [3] McShane CP, (2001), Relative properties of the new combustion-resistant vegetable oil-based dielectric coolants for distribution and power transformers. IEEE Trans. on Industry Applications l.37 (4), 1132–1139.

      [4] Gradnik T, an-Gradnik NK, Petric N & Muc N, (2011), Experimental evaluation of water content determination in transformer oil by moisture sensor, IEEE International Conference on Dielectric Liquids, 2011, 1-4.

      [5] IEC TC10, IEC 60422 Ed. 3.0 b:2005, Mineral insulating oils in electrical equipment - Supervision and maintenance guidance, Multiple. Distributed through American National Standards Institute (ANSI), 2007.

      [6] IEEE Guide for Acceptance and Maintenance of Insulating Oil in Equipment, IEEE Std C57.106-2006 (Revision of IEEE Std C57.106- 2002), 2006.

      [7] Shukla P, Sood YR & Jarial RK, (2013), Experimental Evaluation of Water Content In Transformer Oil, International Journal of Innovative Research in Science, Engineering and Technology, 2 (1), 284-291.

      [8] Lai WL, Kind T & Wiggenhauser H, (2011), Using ground penetrating radar and time–frequency analysis to characterize construction materials, NDT & E International, 44 (1), 111-120.

      [9] Al-Mattarneh H, (2016), Determination of chloride content in concrete using near- and far-field microwave non-destructive methods, Corrosion Science, Corrosion Science 105, 133–140.

      [10] Al-Qadi IL, Riad SM, Mostafa R &Su W, (1997), Design and evaluation of a coaxial transmission line fixture to characterize Portland cement concrete, Construction, and Building Materials, 11 (3), 163-173.

      [11] Al-Mattarneh H, Ghodgaonkar DK & Majid WMBWA, (2001), Microwave sensing of moisture content in concrete using open-ended rectangular waveguide, Subsurface Sensing Technologies and Applications, 2 (4), 377-390.

      [12] Johri GK & Roberts JA, (1990), Study of the dielectric response of water using a resonant microwave cavity as a probe, J. Phys. Chem., 94 (19), 7386–7391.

      [13] Al-Mattarneh H., (2014), Enhancement of Parallel Plate Sensor for Electromagnetic Characterization of Material, European Journal of Scientific Research, 120 (3), 348-359.

      [14] Lee JH, Oh MH, Park J, Lee SH & Ahn KH, (20013), Dielectric dispersion characteristics of sand contaminated by heavy metal, landfill leachate and BTEX (02-104B). Journal of Hazardous Materials B105, 83-102.

      [15] John QW & Robert PK, (1996), Reutilizing and retesting of parallel plate sensors in dielectric thermal analysis, Thermo chimica Acta, 272, 95-103.

      [16] Lacquet BM & Swart PL, (1993), A new electrical circuit model for porous dielectric humidity sensors, Sensors and Actuators B: Chemical, 17 (1), 41-46.

      [17] McCarter WJ, Starrs G & Chrisp TM, (1999), Immittance spectra for Portland cement/fly ash-based binders during early hydration, Cement and Concrete Research, 29 (3), 377-387.

      [18] Al-Mattarneh H, (2014), Electromagnetic quality control of steel fiber concrete, Construction and Building Materials 73, 350–356.

      [19] Abraham D & McIlhagger R, (1998), Glass fibre epoxy composite cure monitoring using parallel plate dielectric analysis in comparison with thermal and mechanical testing techniques, Composites, Part A: Applied Science and Manufacturing, 29 (7), 811-819.

      [20] Al-Mattarneha H & Alwadie A, (2016), Development of Low Frequency Dielectric Cell for Water Quality Application, Procedia Engineering, 148, 687 – 693.

      [21] Agilent Technologies Inc., (2009), Agilent Impedance Measurement Handbook, A guide to measurement technology and techniques 4th Edition, Printed in USA, June 17, 5950-3000.

      [22] Ehrlich F, (1953), Dielectric Properties of Teflon from Room Temperature to 314°C and from Frequencies of 102 to 105 c/s l, Journal of Research of the National Bureau of Standards, 51 (4), 185-188.

      [23] Mathew T, Vyas AD & Tripathi D, (2009), Dielectric Properties of Some Edible and Medicinal Oils at Microwave Frequency, Canadian Journal of Pure and Applied Sciences, 3 (3), 953-957.




Article ID: 24667
DOI: 10.14419/ijet.v7i3.32.24667

Copyright © 2012-2015 Science Publishing Corporation Inc. All rights reserved.