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Method and device for calculating wind load on conductors

A calculation method and wind load technology, applied in the field of conductor wind load calculation methods and devices, can solve the problems of turbulent flow characteristics, the influence of conductor wind load, and the low calculation accuracy of conductor wind load, etc., and achieve accurate and reliable conductor wind load Effect

Active Publication Date: 2021-08-13
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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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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  • Method and device for calculating wind load on conductors
  • Method and device for calculating wind load on conductors
  • Method and device for calculating wind load on conductors

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Embodiment 1

[0059] For ease of understanding, see figure 1 , Embodiment 1 of a method for calculating the wind load of a conductor provided by the present application, including:

[0060] Step 101, calculate the fluctuating wind power spectrum of the typhoon wind field based on the preset Von Karman spectrum.

[0061] It should be noted that the energy distribution of the fluctuating wind speed in the frequency domain can be described by the power spectrum. As an important tool to characterize the fluctuating characteristics of the wind field, the fluctuating wind power spectrum will produce influences. This embodiment calculates the fluctuating wind power spectrum of the typhoon wind field based on the preset Von Karman spectrum, which can effectively describe the law of fluctuating wind characteristics changing with the ground height, and can also consider the influence of turbulence intensity and turbulence integration scale; specifically, Through the second formula, the fluctuating ...

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Abstract

The application discloses a method and device for calculating wind load on a wire. The method includes: calculating the fluctuating wind power spectrum of the typhoon wind field based on the preset Von Karman spectrum; calculating the target downwind turbulence intensity of the typhoon wind field according to the preset reference downwind turbulence intensity; Calculate the turbulence integral scale under the typhoon wind field by using the preset height above the ground and the preset rough length of the ground; construct the fluctuating wind coherence function according to the average wind speed in the downwind direction and fluctuating wind speed frequency; Scale, fluctuating wind coherence function and preset wire average wind load to solve the equivalent static wind load of the wire. The present application can solve the technical problem that the wind field characteristics adopted in the prior art do not consider the influence of the turbulence characteristics on the wind load of the wire, which leads to a low calculation accuracy of the wind load of the wire under a typhoon wind field.

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 wind field under the good wind are not applicable to the typhoon wind field. Its characteristic paramet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/15
CPCG06F17/15
Inventor 聂铭刘小璐罗啸宇谢文平黄正肖凯
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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