Modification of DC Flashover Voltage at High Altitude on the Basis of Molecular Gas Dynamics

- Journal title : Journal of Electrical Engineering and Technology
- Volume 10, Issue 2, 2015, pp.625-633
- Publisher : The Korean Institute of Electrical Engineers
- DOI : 10.5370/JEET.2015.10.2.625

Title & Authors

Modification of DC Flashover Voltage at High Altitude on the Basis of Molecular Gas Dynamics

Liu, Dong-Ming; Guo, Fu-Sheng; Sima, Wen-Xia;

Liu, Dong-Ming; Guo, Fu-Sheng; Sima, Wen-Xia;

Abstract

The effect of altitude on thermal conduction, surface temperature, and thermal radiation of partial arc was investigated on the basis of molecular gas dynamics to facilitate a deep understanding of the pollution surface discharge mechanism. The DC flashover model was consequently modified at high altitude. The validity of the modified DC flashover model proposed in this paper was proven through a comparison with the results of high-altitude simulation experiments and earlier models. Moreover, the modified model was found to be better than the earlier modified models in terms of forecasting the flashover voltage. Findings indicated that both the thermal conduction coefficient and the surface thermodynamics temperature of partial arc had a linear decrease tendency with the altitude increasing from 0 m to 3000 m, both of which dropped by approximately 30% and 3.6%, respectively. Meanwhile, the heat conduction and the heat radiation of partial arc both had a similar linear decrease of approximately 15%. The maximum error of DC pollution flashover voltage between the calculation value according to the modified model and the experimental value was within 6.6%, and the pollution flashover voltage exhibited a parabola downtrend with increasing of pollution.

Keywords

Flashover;High altitude;Molecular gas dynamics;Energy balance model;Radiation;

Language

English

References

1.

Caixin Sun. Atmospheric environment and Electrical insulation. Beijing: China power press, 2002, pp. 35-46.

2.

M. EI-A. Slama, A. Beroual, H. Hadi. Analytical computation of discharge characteristic constants and critical parameters of flashover of polluted insulators. IEEE Transactions on Electrical Insulation, 17, pp. 1764-1771, 2010.

3.

Rizk F A M. Mathematical models for pollution flashover. Electra, 78, pp. 71-103, 1981.

4.

Sundararajan R, Gorur R S. Dynamic arc modeling of pollution flashover if insulators under DC voltage. IEEE Trans. on Electrical Insulation, vol. 26, no. 2, pp. 209-218, 1993.

5.

Fusheng Guo, Wenxia Sima, Qing Yang, Tao Yuan. Calculation of the physical characteristics of development streamer at arc head along the polluted surface. International Review of Electrical Engineering, vol. 7, no. 2, pp. 4343-4350, 2012.

6.

Wenxia Sima, Fusheng Guo, Qing Yang, Tao Yuan, Rui Wang. Radiant discharge development model for polluted surface along short plate under DC voltage. Proceedings of the CSEE, vol. 32, no. 22, pp. 174-181, 2012.

7.

Wenxia Sima, Fusheng Guo, Qing Yang, Tao Yuan. Calculation of the arc velocity along the polluted surface of short glass plates considering the air effect. Energies, vol.5, no.3, pp. 815-834, 2012.

8.

Zhang Zhijin, Jiang Xingliang, SunCaixin, Hu Jianlin, Yuan Jihe. DC Pollution flashover process for insulator string at low air pressure. Transactions of China Electro-technical Society, vol. 24, no. 4, pp. 30-35, 2009.

9.

Rudakova v m, Tikhodeev N N. Influence of low air pressure on flashover voltage of polluted insulators: test data, generalization attempts and some recommendations. IEEE Transactions on Power Delivery, vol.4, no.1, pp. 607-613, 1989.

10.

Bergman V I, Kolobova O I. Some results of investigation of the dielectric strength of polluted lines insulation in conditions of reduced atmospheric. Electrotrchnika, vol. 54, no. 2, pp. 54-56, 1983.

11.

Kawamura T, Ishii M, Akbar M, et al. Pressure dependence of DC breakdown of contaminated insulators. IEEE Transactions on Electrical Insulation, EI-vol.17, no.1, pp. 39-45, 1982.

12.

Xingliang Jiang, Jihe Yuan, Lichun Shu etc. comparison of DC pollution flashover performances of various types of porcelain, glass and composite insulators. Power Delivery, vol. 23, no. 2, pp. 1183-1190, 2008.

13.

Zhicheng Guan. External insulation of insulator and Power Transmission Equipment. Beijing: Tsinghua University press, 2006, pp. 115-132.

14.

Xu Jialuan, Jin Shangxian. Plasma physics. Atomic Energy Press: Beijing, China, 1981, pp. 169-176.

15.

Li Shunyuan, Zhang Renyu, Tan Kexiong. The study of electric arc propagating along a polluted dielectric surface under AC voltage. Proceedings of the CSEE, vol. 11, no. 2, pp. 1-7, 1991.

16.

Guo Zengyuan, Zhao Wenhua. Arc and thermal plasma. Science Press: Beijing, China, 1986, pp. 10-60.

17.

Dai, G. Heat Transfer, 2nd ed.; Higher Education Press: Beijing, China, 1999, pp. 188-206.

18.

Zhang Zhijin, Jiang Xingliang, Sun Caixin, Hu Jianlin, Yuan Jihe. DC pollution flashover model and its validation of polluted insulator strings. Transactions of China electrotechnical society, vol. 24, no. 4, pp. 36-41, 2009.

19.

Zhang Lanzhi. Thermology. Harbin Institute of Technology Press: Harbin, China, 2000, pp. 223-224.

20.

Guan Zhicheng, Zhang Renyu. Calculation of dc and ac flashover voltage of polluted insulators. IEEE Transactions on Electrical Insulation, vol. 25, no. 4, pp. 723-729, 1990.

21.

Williams D L, Haddad A, Rowlands A R, et al. Formation and characterization of dry bands in clean fog on polluted insulators. IEEE Transactions on Dielectrics and Electrical Insulation, vol. 6, no. 5, pp. 724-731, 1999.

22.

23.

Artificial pollution tests on high-voltage insulators to be used on d. c. systems, IEC Tech. Rep. 61245, 1993.