Mathematic Model on Distribution Line Reliability Under Typhoon Weather

Abstract

Distribution line reliability under typhoon weather is studied in the paper. Firstly, the probability density of wire and concrete pole bending strength is studied. Then, a distribution line reliability model with consideration of typhoon wind speed and wind direction is established. When wind speed and wind direction under typhoon weather are known, the load reliability of wire and pole is obtained according to wire tensile strength probability density function and pole bending strength probability density function. Line is equivalent to component series model for obtaining overhead distribution line reliability. The line load risk level is reflected.