[1] Li Xiaofeng*, J.M.K. MacAlpine, Chen JunwuWang Yan, Zhang Guosheng, et al. A Novel Insulator and Its Characteristics [J]. Journal of Southeast University (English Edition), 2001, 17 (2): 47-51. [doi:10.3969/j.issn.1003-7985.2001.02.011]
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A Novel Insulator and Its Characteristics(
)
新型绝缘子及其特性
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 17
- Issue:
- 2001 2
- Page:
- 47-51
- Research Field:
- Electrical Engineering
- Publishing date:
- 2001-12-30
Info
- Title:
- A Novel Insulator and Its Characteristics
- 新型绝缘子及其特性
- Author(s):
- Li Xiaofeng1*, J.M.K. MacAlpine2, Chen Junwu1Wang Yan1, Zhang Guosheng1, Li Zhengying1
-
1Department of Electrical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2Department of Electrical Engineering, Hong Kong Polytechnic University, Hong Kong, China
- Keywords:
- novel insulator; leakage current; pollution flashover; HTVSIR
- PACS:
- TM854
- DOI:
- 10.3969/j.issn.1003-7985.2001.02.011
- Abstract:
- Both the ceramic and the composite insulators have their own advantages and disadvantages when compared with each other. It is a reasonable idea to combine their merits together to design a novel insulator. The key measure of the novel insulator suggested in this paper is to add an annular metal sheet coated with high temperature vulcanisation(HTV)silicone rubber(SIR)at the base of the traditional ceramic insulator cap. The HTVSIR covering on the exterior of the metal sheet can lengthen the creepage distance. The metal sheet can uniform the electric stress, reduce its maximum value and modify its direction on one insulator unit and acts as equalizing ring on an insulator string. The factors stated above are the main reasons why the novel insulator has better insulating performance, including lower leakage current and flashover voltage, especially under polluted conditions. Simultaneously, the novel insulator can overcome the disadvantages of the ordinary remedies which have been widely used to improve the performance of ceramic insulators against pollution. The experimental results obtained in the laboratory were in good agreement with the theoretical analysis and demonstrated the novel insulator’s effectiveness.
- 以普通瓷质绝缘子为基础, 并充分利用硅橡胶材料优良的防污性能, 提出了一种新型绝缘子的设计方法, 其主要措施是在普通瓷质绝缘子的铁帽中部加装了一个表面被覆高温硫化硅橡胶(HTVSIR)的金属环片.金属环片表面的HTVSIR可以达到增加爬距和防污的目的, 金属环片本身除支撑HTVSIR外, 还可以改变电场分布以抑制放电的发展, 从而提高新型绝缘子的起晕和放电电压.清洁和污秽两种情况下的实验结果证明了新型绝缘子确实可以有效地减少表面泄漏和显著地提高闪络电压.
References:
[1] E.Kuffel, W.S.Zaengl, and J.Kuffel, High voltage engineering:fundamentals, 2nd edition, Butterworth-Heinemann, p.509, 2000
[2] R.S.Gorur, E. Cherney, C. de Tourreil, and D. Dumora, et al., Protective coatings for improving contamination performance of outdoor high voltage ceramic insulators, IEEE Transactions on Power Delivery, vol.10, no.2, pp.924-933, 1995
[3] R.J. Chang, M. Shah, L. Mazeika, A. Tsai, and M. Takaseki, Design of insulators for severe contamination, In:Proceedings of the 5th International Conference on Properties and Applications of Dielectric Materials, Seoul, Korea, pp.778-781, 1997
[4] S. Goto, M. Nakamura, N. Nanayakkara, and T. Taniguchi, Reliable automatic decision making for washing the polluted insulators in coastal substations, Electrical Insulation and Dielectric Phenomena, 1995, Annual Report, Conference on, pp.408-411, 1995
[5] A. S.Farag, F. M. Zedan, T.C. Cheng, and C.Y. Wu, et al., New dc insulator design for use in the desert environment, IEEE Transactions on Electrical Insulation, vol.25, no.2, pp.435-448, 1990
[6] B.F. Dewey, Tests on insulators reveal danger signs for silicones, Electrical World, 1969
[7] E.A. Cherney, and R.S. Gorur, RTV silicone rubber coatings for outdoor insulators, IEEE Transactions on Dielectrics and Electrical Insulation, vol.6, no.5, pp.605-611, 1999
[8] IEEE Dielectric and Insulation Soc. Committee s-32-33, Round robin testing of RTV silicone rubber coating for outdoor insulation, IEEE Trans. On Partial Discharge, vol.11, no.4, p.1889, 1996
[9] S.M.Gubanski, Properties of silicone rubber housings and coatings, IEEE Transactions on Power Delivery, vol.27, pp.374-382, 1992
[10] S.H.Kim, E.A.Cherney, and R.Hackam, Hydrophobicity behavior of insulators coated with RTV silicone rubber, IEEE Transactions on Electrical Insulation, vol.27, pp.610-622, 1992
[11] Reuben Hackam, Outdoor HV composite polymeric insulators, IEEE Transactions on Dielectrics and Electrical Insulation, vol.6, no.5, pp.557-585, 1999
[12] H.Zhang, and R.Hackam, Electrical surface resistance, hydrophobicity and diffusion phenomena in PVC, IEEE Transactions on Dielectrics and Electrical Insulation, vol.6, no.1, pp.73-83, 1999
[13] S.Chakravorti, and H. Steinbigler, Boundary element studies on insulator shape and electric field around HV insulators with or without pollution, IEEE Trans. on Dielectrics and Electrical Insulation, vol.7, no.2, pp.169-176, 2000
[14] R.J.Chang, and Linas Mazeika, Analysis of electrical activity associated with inclined-plane tracking and erosion of insulating materials, IEEE Trans. on Dielectrics and Electrical Insulation, vol.7, no.3, pp.394-400, 2000
[15] K.Eldridge, J. Xu, W. Yin, and A.M. Jeffery, Degradation of a silicone-based coating in a substation application, IEEE Transactions on Power Delivery, vol.14, no.1, pp.188-193, 1999
[16] J.P.Reynders, I.R. Jandrell, and S.M. Reynders, Review of aging and recovery of silicone rubber insulation for outdoor use, IEEE Transactions on Dielectrics and Electrical Insulation, vol.6, no.5, pp.620-631, 1999
[17] L.Xi, S. Wang, J. Fan, and Z. Guan, Development of composite insulators in China, IEEE Trans. on Dielectrics and Electrical Insulation, vol.6, no.5, pp.586-594, 1999
[18] A.Bognar, P. Szaplonczay, Sz. Pinter, and G. Banhegyi, Investigation on a 20 years old composite insulator, 10th International Symposium on High Voltage Engineering(ISH’97), Montreal, pp.325-328, 1997
[19] A.De La O, R. S. Gorur, and J. Chang, AC clean fog tests on non-ceramic insulating materials and a comparison with porcelain, IEEE Trans. on Power Delivery, vol.9, no.4, pp.2000-2008, 1994
[20] D.H.Zhu, and, Z. Yan, High voltage insulation, Tsinghua University Press, Beijing, 1992
Memo
- Memo:
- * Born in 1969, male, graduate.