Calculation method and device for wind load of wire

Abstract

The invention discloses a calculation method and device for wind load of a wire. The method comprises the steps of calculating a fluctuating wind power spectrum of a typhoon wind field based on a preset Von Kalman spectrum; calculating target downwind turbulence intensity of the typhoon wind field according to preset reference downwind turbulence intensity; calculating a turbulence integral scaleunder the typhoon wind field according to preset terrain clearance and preset ground roughness length; constructing a fluctuating wind coherence function according to a downwind average wind speed anda fluctuating wind speed frequency; and according to the fluctuating wind power spectrum, the target downwind turbulence intensity, the turbulence integral scale, the fluctuating wind coherence function and a preset average wind load of the wire, solving the equivalent static wind load of the wire. According to the method, the technical problem of relatively low calculation accuracy of the wind load of the wire under the typhoon wind field due to the fact that the influence of turbulence characteristics on the wind load of the wire is not taken into consideration in the wind field characteristics adopted in the prior art can be solved.

Description

technical field [0001] The present application relates to the technical field of power grid disaster prevention, and in particular to a method and device for calculating wind load of conductors. Background technique [0002] Wind tripping of transmission lines is one of the main reasons affecting the safe operation of power grids. Once the line trips due to wind deflection, due to the low recombination efficiency, it often causes unplanned outages, seriously affects the reliability of power supply, and causes huge economic losses. Therefore, it is a necessary task to accurately obtain the wind load of the wire. [0003] In the existing technology, when calculating the wind load on the wire, the characteristics of the good wind field are mainly considered, but the wind load on the wire under the typhoon is not clearly specified, and the characteristic parameters under the good wind field are not applicable to the typhoon wind field. Its characteristic parameters do not cons...

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Problems solved by technology

[0004] This application provides a method and device for calculating the wind load on the wire, which is used to solve the problem that the wind field characteristics adopted in the prior art do not consider the influence of the turbulent flow characteristics on the wind load on the wire, which leads to the calculation accuracy of the wind load on the wire under the typhoon wind field. lower technical issues

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