Short-Term Reliability Evaluation of Transmission System under Strong Wind and Rain

Yanan Wei^1*, Qing Yang², Xiaofu Xiong², Jian Wang², Shijie Weng²

¹Yunnan Power Grid Corporation, Kunming, China.
²State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, China.

DOI: 10.4236/jpee.2014.24089                

Abstract

The impact of strong wind and rain loads will adversely affect the reliability of the overhead lines, it’s necessary to study changes in risk of transmission system and establish the reliability model of overhead lines through the strong wind and rain loads. In this article, the stochastic properties of overhead lines’ strength and loads were used, according to principles of structural reliability, time-dependent failure probability model of overhead lines was established under the impact of strong wind and rain loads. Simulation of the IEEE-79 system demonstrates that failure probability model is effective. This simulation result also shows that the impact of strong wind and rain loads will seriously affect reliability indices of system loads, rain loads cannot be ignored under
strong wind and rain loads.

Keywords

Strong Wind and Rain Loads; Transmission Line; Structural Reliability; Reliability Modeling

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Liu, Y. and Zhou, J.Q. (2003) Incorporating Weather Effect in Bulk Power System Reliability Evaluation. Electric Power Automation Equipment, 23, 60-62.
[2]	Li, Y.H., Han, J.Y. and Wang, T. (2009) Ice Monitoring System of Overhead Electrical Power Lines. Electric Power Automation Equipment, 29, 112-115.
[3]	Li, P. and Ren, Z. (2002) Guangzhou Regional Load Analysis and Short-Term Forecasting Model Design. Electric Power Automation Equipment, 22, 50-53.
[4]	Tang, S.Q., Zhang, M., Jian, S., Wu, X.C., Jiang, K. and Shu, S.Y. (2006) Review of blackout in Hainan on September 26th—Cause and Recommendations. Automation of Electric Power Systems, 30, 1-7, 16.
[5]	Pang, H., Li, B.F., Yu, Y.E, Li, X., Wu, X.C., Zhao, Y., Yu, Q.Y. and Li, P. (2007) Study on Operating Modes of Hainan Power Grid during Typhoon Periods. Power System Technology, 31, 46-50.
[6]	Sun, Y., Wang, X.L., Wang, J.X., and Xie, S.Y. (2011) Wind and Ice Loading Risk Model and Fuzzy Forecast for Overhead Transmission Lines. Proceedings of the CSEE, 31, 21-28.
[7]	Wang, J.X., Zhang, Y., Wu, S. and Sun, Y. (2011) Influence of Large-Scale Ice Disaster on Transmission System Reliability. Proceedings of the CSEE, 28, 49-56.
[8]	(2003) IEC 60826 Design Criteria of Overhead Transmission Lines.
[9]	(2010) GB50545-2010 of Code for Design of 110 kV - 750 kV Overhead Transmission Line.
[10]	Xie, Q., Zhang, Y. and Li, J. (2006) Investigation on Tower Collapses of 500 kV Renshang 5237 Transmission Line Caused by Downburst. Power System Technology, 30, 59-53.
[11]	Eguehi, Y., Kikuehi, N. and Kawabata, K. (2002) Drag Reduction Mechanism and Aerodynamic Characteristics of a Newly Developed Overhead Electric Wire. Journal of Wind Engineering and Industrial Aerodynamics, 90, 293-304. http://dx.doi.org/10.1016/S0167-6105(01)00201-X
[12]	Bai, H.F. and Li, H.N. (2009) Dynamic Response of Overhead Transmission Lines to Oscillation Caused by Wind or Rainfall Loads. Power System Technology, 33, 36-40.
[13]	Sheng, P.X., Mao, J.T. and Li, J.G. (2003) Atmospheric Physics. Peking University Press, Beijing.
[14]	Kikuehi, N. and Matsuzaki, Y. (2003) Aerodynamic Drag of New-Design Electric Power Wire in a Heavy Rainfall and Wind. Journal of Wind Engineering & Industrial Aerodynamics, 91, 41-45. http://dx.doi.org/10.1016/S0167-6105(02)00334-3