Abstract
This article deals with the issue of selected polymer composites consisting of a thermoset matrix and reinforcing glass fibers. These composites are designed for high voltage applications as an electrical insulating material with high mechanical durability. Three composites with a significantly matrix, specifically, epoxy, polyurethane and polyester resin, are selected with an emphasis on usability in the technical practice. Key properties of tested composites are dielectric and mechanical properties and from this point of view the homogeneity of prepared specimens is very important. An important influencing factor, which is a frequent cause of deterioration of material properties, is a higher level of moisture or even direct contact with water leading to the diffusion of water into the material structure. The main subject of presenting research is therefore the assessment of the water diffusion impact on processed material in the relation to the resistance of the tested specimens to the applied high voltage. Tested composite structures are observed by optical microscopy and the computed tomography is used for analysis of the material volume. Purely surface dielectric properties in the delivered state were evaluated based on the measurement of surface current at a constant direct or alternating test voltage. Results of surface current measurement for all composites in the delivered state show minimal differences between composites. The minimal dependence, primarily for composite with polyurethane, of the water diffusion test results on the internal structure and on the character of voids within tested specimens is determined. The lowest level of voids was found for epoxy matrix composite, but this material did not pass the water diffusion test. Differences of the HV resistance obtained from the water diffusion test are most likely caused mainly by different chemical resistance of resins against boiling slightly alkaline aqueous solution.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Nadhirah, A., Beddu, S., Mohamad, D., Zainoodin, M., Nabihah, S., et al.: Properties of fiberglass crossarm in transmission tower - a review. Int. J. Appl. Eng. Res. 12(24), 15228–15233 (2017)
Grzybowski, S., Disyadej, T.: Electrical performance of fiberglass crossarm in distribution and transmission lines. In: IEEE/PES Transmission and Distribution Conference and Exposition. IEEE (2008). https://doi.org/10.1109/tdc.2008.4517257
Godat, A., Légeron, F., Gagné, V., Marmion, B.: Use of FRP pultruded members for electricity transmission towers. Composite Struct. 105(Nov. 2013), 408–421 (2013). https://doi.org/10.1016/j.compstruct.2013.05.025
Sateesh, N., Rao, P.S., Ravishanker, D.V., Satyanarayana, K.: Effect of moisture on GFRP composite materials. In: Materials Today: Proceedings, vol. 2, no. 4–5, pp. 2902–2908. Elsevier (2015). https://doi.org/10.1016/j.matpr.2015.07.252
Bakar, M.S.A., Mohamad, D., Ishak, Z.A.M., Yusof, Z.M., Salwi, N.: Durability control of moisture degradation in GFRP cross arm transmission line towers. In: AIP Conference Proceedings, vol. 2031, no. 1, pp. 020027(1)–020027(5). AIP Publishing (2018). https://doi.org/10.1063/1.5066983
Toth, J., Lockhart, G.: Development of fibre reinforced polymer composite cross arms for sustaining transmission lines. In: CIGRE Canada Conference. CIGRE (2013)
Utracki, L.A.: Polymer Blends Handbook, 1442 p. Kluwer Academic Publishers, Dordrecht (2002). ISBN 1-4020-1110-5
Goodman, S.H.: Handbook of Thermoset Plastics, 582 p. Noyes Publications, Westwood (1998). ISBN 0-8155-1421-2
Starr, T.F.: Pultrusion for Engineers, 336 p. Woodhead Publishing Limited, Boca Raton (2000). ISBN 978-1-85573-425-8
Blaha, A., Eder, M.: Plastko 99. Academia Centrum UTB, Zlín (1999)
Armentrout, D., Kumosa, M., Kumosa, L.: Water diffusion into and electrical testing of composite insulator GRP rods. IEEE Trans. Dielectr. Electr. Insul. 11(3), 506–522 (2004). https://doi.org/10.1109/TDEI.2004.1306729
Model 6514 Electrometer Specifications. www.tek.com/keithley-low-level-sensitive-and-specialty-instruments/keithley-high-resistance-low-current-electr-3. Accessed 13 May 2019
Acknowledgments
This research has been supported by the Grant Agency of Czech Republic (TACR) under the project TH03020355 “Composite Insulating Constructions in Electrical Engineering”.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Switzerland AG
About this paper
Cite this paper
Kadlec, P. et al. (2020). Evaluation of Structure Influence Within the Context of Water Diffusion and Surface Current of Glass Reinforced Polymer Composites for HV Insulation. In: Németh, B. (eds) Proceedings of the 21st International Symposium on High Voltage Engineering. ISH 2019. Lecture Notes in Electrical Engineering, vol 599. Springer, Cham. https://doi.org/10.1007/978-3-030-31680-8_21
Download citation
DOI: https://doi.org/10.1007/978-3-030-31680-8_21
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-31679-2
Online ISBN: 978-3-030-31680-8
eBook Packages: EngineeringEngineering (R0)