• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

Electric Power Construction ›› 2016, Vol. 37 ›› Issue (7): 133-140.doi: 10.3969/j.issn.1000-7229.2016.07.019

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Wind and Rain Loading Failure Probability Model for Overhead Transmission Lines Considering Fatigue Impairment

HE Di1, ZHANG Yu1, GUO Chuangxin1, YANG Pan2, JIN Yu2   

  1. 1. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China; 2. Guiyang Electric Power Supply Bureau, Guiyang 550002, China
  • Online:2016-07-01
  • Supported by:
    Project supported by National High Technology Research and Development Program of China (863 program) (2015AA050204)

Abstract: As typical wind-sensitive structures, overhead transmission lines are easily affected by extreme weather disasters which will cause failure outage. In order to study the impacts of strong storm and device mechanical strength on the line failure probability, this paper constructs a wind and rain load failure probability model with considering fatigue impairment based on the design code of transmission line and material structural fatigue process. The model adopts a nonlinear process of strength degradation to describe the material fatigue impairment and utilizes the interference theory of load-strength to calculate the failure probability. We demonstrate different circumstances of failure probability under wind, rain and fatigue impairment, and take IEEE-RTS79 system as example to introduce a screening method for important lines and weak spans based on this model. The model can not only quantitatively analyze the increase impact of different wind and rain loads on the failure probability, but also have response to the fatigue impairment caused by daily physical vibration of lines, which is a new modeling idea and has a good application prospect.

Key words: overhead transmission line, failure probability model, fatigue impairment, wind and rain load

CLC Number: