Author(s)

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.

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.

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

Wei, Y. , Yang, Q. , Xiong, X. , Wang, J. and Weng, S. (2014) Short-Term Reliability Evaluation of Transmission System under Strong Wind and Rain. Journal of Power and Energy Engineering, 2, 665-672. doi: 10.4236/jpee.2014.24089.