Electrical Engineering

, Volume 101, Issue 3, pp 675–683 | Cite as

Preliminary study on icing and flashover characteristics of inverted T-type insulator strings

  • Yafeng ChaoEmail author
  • Fuyong Huang
Original Paper


Insulator icing flashover has always been one of the important factors influencing the safety of power grids in winter. Due to the limitation of tower structure and distance between the conductor and the ground, the existing anti-icing flashover method has certain effects but still cannot fully meet the safety requirements of power grids. Based on the idea of changing the ice coverage and discharge path of insulator string, a brand-new insulator string that arranged as inverted T-type is proposed in this paper to achieve the purpose of reducing ice coating and increasing the ice flashover voltage. The icing and flashover experiments are simulated in an artificial climate room. The experiment results show that the ice amount of inverted T-type insulator is smaller than that of the same type and same creepage distance of suspension I-string, and the inclined portion of the inverted T-type arrangement is basically free from bridges under glaze and mixed-phase ice conditions. In the case of the same creepage distance, dry-arc distance, the same degree of contamination, and the ice-covering condition of the same type of insulator, the melting flashover voltage gradient E50 of the inverted T-type string is 14.8–16.3% higher than that of the suspended I-string. The results show that after the insulator adopts inverted T-type arrangement, the ice coating can be significantly reduced and the ice flashover voltage can be increased. The conclusions of the study provide a new solution for the anti-icing flashover treatment and design of the overhead lines.


Transmission line Inverted T-type arrangement Insulators Icing Flashover 



  1. 1.
    Farzaneh M, Zhang J, Chen X (1997) Modeling of the AC arc discharge on ice surfaces. IEEE Trans Power Deliv 12(1):325–338CrossRefGoogle Scholar
  2. 2.
    Farzaneh M, Chisholm W (2009) Insulators for icing and polluted environments. Wiley, HobokenCrossRefGoogle Scholar
  3. 3.
    Chameski MD (1982) Flashover tests of artificially insulator. IEEE Trans 8:2429–2433Google Scholar
  4. 4.
    Xingliang Jiang, Hui Yi (2002) Transmission line icing and protection. China Electric Power Press, Beijing (in Chinese) Google Scholar
  5. 5.
    Kuroiwa D (1958) Icing and snow accretion. Monogr Ser Res Inst Appl Electr 6:1–30Google Scholar
  6. 6.
    Xing C (2000) Modeling of electrical arc on polluted ice surface. Ph.d. dissertation, CanadaGoogle Scholar
  7. 7.
    Farzaneh M, Melo OT (1990) Properties and effect of freezing and winter fog on outline insulators. J Cold Reg Sci Technol 19:33–46CrossRefGoogle Scholar
  8. 8.
    Le WANG, Qiang SUN, Jianqi LIU (2008) Comparative analysis on measures taken by china and other countries to cope with power grid blackouts caused by ice storms. Electr Power Technol Econ 20(2):6–10 (in Chinese) Google Scholar
  9. 9.
    Jiang X, Zhao J, Luo B, Zhang J, Huang C (2009) Survey and analysis of ice accidents of early 2008 in Southern China. In: IWAIS XIII, Andermatt, September 8–11, 2009Google Scholar
  10. 10.
    Huang X, Li J, Liu W, Liu J, Song A (2009) A new on-line monitoring system of transmission line icing and snowing. In: IWAIS XIII, Andermatt, September 8–11, 2009Google Scholar
  11. 11.
    Jiang X, Zhang Z, Hu Q, Hu J, Shu L (2008) Thinkings on the restrike of ice and snow disaster to the power grid. High Vol Eng 44(2):463–469 (in Chinese) Google Scholar
  12. 12.
    Farzaneh M, Kiernicki J (1997) Flashover performance of IEEE standard insulators under ice conditions. IEEE Transactions on Power Delivery 12(4):1602–1613CrossRefGoogle Scholar
  13. 13.
    Gutman I, Halsan K, and Hü Binette D (2003) Application of ice progressive stress method for selection of insulation options. In: Smit J (ed) Proceedings of 2003 international symposium on high voltage (ISH- 2003), Mill press, Netherlands, Rotterdam, The Nether-lands, p. 179Google Scholar
  14. 14.
    Zhang Z, Jiang X, Sun C, Hu J, Huang H, Gao DW (2012) Influence of insulator string positioning on AC icing flashover performance[J]. IEEE Trans Dielectr Electr Insul 19(4):1335–1343CrossRefGoogle Scholar
  15. 15.
    Kannus K, Lahti K (2007) Laboratory investigations of the electrical performance of ice-covered insulators and a metal oxide surge arrester. IEEE Trans Dielectr Electr Insul 14(6):1357–1372CrossRefGoogle Scholar
  16. 16.
    Yin F, Jiang X, Farzaneh M, Hu J (2015) Electrical performance of 330-kV composite insulators with different shed configurations under icing conditions[J]. IEEE Trans Dielectr Electr Insul 22(6):3395–3404CrossRefGoogle Scholar
  17. 17.
    Jiang XL, Wang B, Zhang ZJ, Hu JL, Sun CX (2007) Influence of units and assemble on DC flashover voltage of iced insulator strings at high altitude districts. J Chongqing Univ (Nat Sci Ed) 7:37–41Google Scholar
  18. 18.
    Xiangyang PENG, Senjing YAO, Xianyin MAO, Zhihai XU, Zhidong JIA (2012) Research on electrocaloric effect and ice–water switching principle based anti-icing coating for insulators of overhead transmission lines and its performance. Power Syst Tech-nol 36(7):133–138 (in Chinese) Google Scholar
  19. 19.
    National Energy Administration of China (2013) DL/T 1244-2013 Artificial icing flashover test methods on high voltage insulators to be used in AC system (in Chinese) Google Scholar
  20. 20.
    IEC 60507-2013 (2013) Artificial pollution tests on high-voltage ceramic and glass insulators to be used on a.c. systemsGoogle Scholar
  21. 21.
    Farzaneh M, Baker T, Bemstorf A et al (2003) Insulator icing test methods and procedures: a position paper prepared by the IEEE task force on insulator icing test methods. IEEE Trans Power Deliv 18(4):1503–1515CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Grid Hunan Electric Power Company Limited Research InstituteYuhua District, ChangshaChina

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