INVESTIGATION THE EFFECT OF SOLUTION CONDUCTIVITY ON THE GROWTH RATE AND SHAPE OF WATER TREES OBSERVED IN DISTRIBUTION CABLES

Year 2017, Volume: 17 Issue: 2, 3445 - 3451, 27.07.2017

Mustafa Karhan , Aysel Ersoy Yılmaz , Mukden Uğur

Abstract

In this study, samples were taken from the polymeric insulator parts of XLPE insulated medium voltage cables already used for energy transmission and distribution.These samples have been aged in a controlled manner in the laboratory environment. The applied voltage and frequency was adjusted 24 kVpp and 3 kHz respectively to initiate and grow water treeing in a short time period. The thickness of the samples taken from the polymeric insulator part of the cable was determined as 800 μm - 950 μm. The lengths, widths and geometry of water trees formed in saline solutions with different conductivities were analyzed. The study is mainly based on investigation the effect of external factors on the growth of water trees observed in XLPE type transmission and distribution cables.

Keywords

Water treeing , vented tree , cross linked polyethylene insulation (XLPE) , molarity , conductivity

References

• [1] Werelius, P. (2001). Development and application of high voltage dielectric spectroscopy for diagnosis of medium voltage XLPE cables (Doctoral dissertation, Elektrotekniska system).
• [2] Boonraksa, T., & Marungsri, B. (2014). Role of ionic solutions affect water treeing propagation in XLPE insulation for high voltage cable. World Academy of Science, Engineering and Technology, International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering, 8(5), 788-791.
• [3] Wang, J., Zheng, X., Li, Y., & Wu, J. (2013). The influence of temperature on water treeing in polyethylene. IEEE Transactions on Dielectrics and Electrical Insulation, 20(2), 544-551.
• [4] Shaw, M. T., & Shaw, S. H. (1984). Water treeing in solid dielectrics. IEEE Transactions on Electrical Insulation, (5), 419-452.
• [5] Nunes, S. L., & Shaw, M. T. (1980). Water treeing in polyethylene-a review of mechanisms. IEEE Transactions on Electrical Insulation, (6), 437-450.
• [6] Miyashita, T. (1971). Deterioration of water-immersed polyethylene-coated wire by treeing. IEEE Transactions on Electrical Insulation, (3), 129-135.
• [7] Lanca, M. C. (2002). Electrical ageing studies of polymeric insulation for power cables (estudo do envelhecimento eléctrico do isolante polimérico de cabos eléctricos.
• [8] Steennis, E. F., & Kreuger, F. H. (1990). Water treeing in polyethylene cables. IEEE Transactions on Electrical Insulation, 25(5), 989-1028.
• [9] Sanniyati, C. N., Arief, Y. Z., Adzis, Z., Muhamad, N. A., Ahmad, M. H., Sidik, M. A. B., & Lau, K. Y. (2016). Water tree in polymeric cables: a review. Malaysian Journal of Fundamental and Applied Sciences, 12(1).
• [10] Steennis, E. F. (1989). Water treeing. The behavior of water tress in extruded cable insulation. Delft: Delft University of Technology.
• [11] Filippini, J. C., & Meyer, C. T. (1988). Water treeing using the water needle method: the influence of the magnitude of the electric field at the needle tip. IEEE transactions on electrical insulation, 23(2), 275-278.
• [12] Dissado, L. A., Wolfe, S. V., Filippini, J. C., Meyer, C. T., & Fothergill, J. C. (1988). An analysis of field-dependent water tree growth models. IEEE transactions on electrical insulation, 23(3), 345-356.
• [13] Ashcraft, A. C. (1977) Treeing Update Part III: water trees. Kabelitems 152, Union Carbide Corporation. Based on Water treeing in polymer dielectrics , in World Electrotechnical Congress in Moscow, No. 152, pp.5- 11.
• [14] Hellesø, S., Benjaminsen, J. T., Selsjord, M., & Hvidsten, S. (2012). Water tree initiation and growth in XLPE cables under static and dynamic mechanical stress, Electrical Insulation (ISEI), Conference Record of the 2012 IEEE International Symposium, 10-13 June 2012, San Juan, PR, USA , ISBN: 978-1-4673-0488-7, 623-627.
• [15] Stancu, C., Notingher, P. V, Ciuprina, F., Notingher, P., Castellon, J., Agnel, S., & Toureille, A., (2009). Computation of the Electric Field in Cable Insulation in the Presence of Water Trees and Space Charge, IEEE Transactions on Industry Applications, 45(1), 30–43.
• [16] Bamji, S., Bulinski, A., Densley, J., Garton, A. and Shimizu, N. (1984). Water Treeing in Polymeric Insulation. Conference Internationale des Grandes Rkseaux Electriques Haute Tension (CIGRE), 15-07.
• [17] Koo, J. Y., & Filippini, J. C. (1983). Effect of physico-chemical factors on the propagation of water trees in polyethylene. Conduction and Breakdown in Solid Dielectrics, Proceedings of First International Conference, pp. 255-260.
• [18] Malik, N. H., Qureshi, M. I., & Al-Arainy, A. (2006) The role of cations in water tree growth in technical grade XLPE insulated cables. Properties and applications of Dielectric Materials, Bali, Indonesia, ISBN: 1-4244-0189-5, 127-130.
• [19] Al-Arainy, A. A., Ahaideb, A. A., Qureshi, M. I., & Malik, N. H. (2004). Statistical evaluation of water tree lengths in XLPE cables at different temperatures. IEEE Transactions on Dielectrics and Electrical Insulation, 11(6), 995-1006.