Research on Water Content and Physicochemical Properties of Insulating Materials for Water-Soaked XLPE Cable

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The buried environment of cross-linked polyethylene (XPLE) cable is relatively severe, and some ones are even immersed in water directly. In this paper, an XLPE cable was soaked in foul water to simulate the cable’s actual water area environment, lasting for three years. The water content in the insulation layers of water-soaked cable was measured by infrared spectrometer and moisture analyzer, and the crystal morphology and physicochemical properties of the insulation layers were investigated by differential Scanning Calorimeter (DSC), scanning electron microscopy (SEM) and tensile testing technology. The results showed that a small amount of water did enter into the cable insulation owing to the increasing of hydroxyl (-OH) content, and followed being verified by moisture analyzer. The degree of crystallinity of water-soaked cable insulating material is also increased, and the mechanical properties were deteriorated.

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Edited by:

Junichi Hojo, Tohru Sekino, Jian Feng Yang, Hyung Sun Kim and Wen Bin Cao

Pages:

192-197

Citation:

Z. W. Li et al., "Research on Water Content and Physicochemical Properties of Insulating Materials for Water-Soaked XLPE Cable", Materials Science Forum, Vol. 922, pp. 192-197, 2018

Online since:

May 2018

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$38.00

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[1] X.L. Cao, Y. Liu, L.S. Zhong, Power cable technology status and trends seeing from 2010 CIGRE conference, High Volt., 36 (2010) 3078-3083.

[2] S.H. Wang, P.X. Chen and J.Y. Li, Difference of dielectric properties between AC and DC XLPE cable used insulation materials, 2016 International Conference on Condition Monitoring and Diagnosis. IEEE, 2016, 148-151.

DOI: https://doi.org/10.1109/cmd.2016.7757772

[3] C. Stancu, P.V. Notingher, C. Stoica, M. Plopeanu, P. Notingher jr, Influence of Dimensions and Density of Water Trees on Residual Electric Field in Polymeric Power Cables Insulations, Rev. Roum. Sci. Tech.-Ser. Electro., 3 (2010) 289-299.

[4] J.H. Luo, L.M. Yang, Y. Jiang, Outline of operation and fault and testing for power cable, Electr. Equip., 5 (2004) 4-8.

[5] B. Zhu, Z.D. Jia, Y. Yuan, Research on the insulation properties of 10kV XLPE damp cable, 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials. IEEE, 2015, 592-595.

DOI: https://doi.org/10.1109/icpadm.2015.7295341

[6] Y. Yuan, J. Chen, Z.D. Jia, Study About Insulating Properties of 10kV XLPE Damp Cable, Power Sys. Techno. 38 (2014) 2875-2880.

[7] M. Plopeanu, P.V. Notingher, C. Stancu, Electrical ageing of polyethylene power cables insulation subjected to an electric field in the presence of water, 2011 7th International Symposium on Advanced Topics in Electrical Engineering. IEEE, 2011, 1-4.

DOI: https://doi.org/10.1109/optim.2012.6231788

[8] C.L. Zhou, Z.Q. Wang, Evaluation of moisture content for ethylene-propylene rubber (EPR) insulation cables using integral values of tanδ, J. Dalian Univ. Techno., 53 (2013) 261-266.

[9] X. Yu, P.F. Gao, X.Y. Peng, Effect of Degassing Treatment on the Crystalline Morphology of XLPE Insulation Used for 110kV XLPE Cable, Mater. Sci. Forum., 868 (2016) 33-37.

DOI: https://doi.org/10.4028/www.scientific.net/msf.868.33

[10] B. Chen, H.Y. Wu, Study on Trace Water Influence on Electrical Properties of Insulating Oil Based on the Mid-Infrared Spectrum Analysis, Spectrosc. Spect. Anal., 10 (2015) 2740-2745.

[11] Z. Chen, C. Luo, J. Zhang, Electrical aging test and accelerated water tree aging test for physicochemical properties of XLPE insulation, J. Xi'an Jiaotong Univ., 49(2015) 32-39.

[12] P. Luo, Y. Xu, X. Gu, Thermal and mechanical properties analysis for EHV XLPE cables with different operating years, 2013 Annual Report Conference Electrical Insulation and Dielectric Phenomena. IEEE, 2013, 47-51.

DOI: https://doi.org/10.1109/ceidp.2013.6748249

[13] X.H. Zhu, B.X. Du, Effects of Cross-linking Process on Crystallinity of XLPE, Insul. Mater., 43 (2010) 44-47.