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Wind speed determination method for wind deviation design of transmission tower considering combined distribution of lightning wind speed

A transmission tower and lightning technology, which is applied in the field of determination of the design wind speed of the wind deflection of the transmission tower, to achieve the effect of reducing the risk level and the probability of design strong wind

Active Publication Date: 2018-12-21
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: aiming at the problem in the prior art that the design wind speed of the wind deflection of the above-mentioned transmission tower is an empirical parameter established under the lack of detailed data, to provide a determination of the design wind speed of the wind deflection of the transmission tower considering the joint distribution of lightning wind speed method

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  • Wind speed determination method for wind deviation design of transmission tower considering combined distribution of lightning wind speed
  • Wind speed determination method for wind deviation design of transmission tower considering combined distribution of lightning wind speed
  • Wind speed determination method for wind deviation design of transmission tower considering combined distribution of lightning wind speed

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Embodiment 1

[0028] Taking the lightning and wind speed data from May 15th to June 8th in a certain area in 2005 as an example, the design wind speed of the power transmission tower in this area is 15m / s.

[0029] The daily lightning-to-ground lightning data and daily maximum wind speed in this area from May 15 to June 8, 2005 are shown in Table 1 below. Excluding the lightning-free days (May 21 and 22), the data are listed in the descending order of daily maximum wind speed, and the data is shown in Table 2 below. Among them, there are a total of 47,331 lightning-to-ground flash records in this period, and 5% of the number of lightning-to-ground flashes 2366 times. The number of lightning-to-ground flashes in descending order of the maximum wind speed per day is counted from large to small. The number of lightning-to-ground flashes on a single day with the maximum wind speed (i.e. June 7) is 1696, and the total number of lightning-to-ground flashes with less than 5% is 2,366. ; The maximum ...

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Abstract

The invention relates to a wind speed determination method for wind deviation design of transmission pole tower considering the combined distribution of lightning wind speed. The method comprisesrespectively selecting historical lightning data and historical wind speed data of corresponding time period from wind speed observation data of lightning positioning system and meteorological station in the target area; calculating the lightning flash times of each lightning flash day, removing the lightning flash day without lightning, finding out the daily maximum wind speed of each lightning flashday at the same time, accumulating the lightning flash times of each day from big to small day by day in descending order of the daily maximum wind speed; when the accumulated lightning flashes are equal to or greater than 5% of the total lightning flashes, taking the daily maximum wind speed of the same day as the reference wind deviation design wind speed of the transmission tower, If the designwind speed of the transmission tower reference wind deviation is larger than the design wind speed of the transmission tower deviation set by the existing regulations according to the empirical parameters, the design wind speed of the transmission tower reference wind deviation being set as the design wind speed of the transmission tower deviation in the target area, otherwise, the design wind speed of the transmission tower deviation specified in the existing regulations is still used.

Description

Technical field [0001] The invention relates to a method for determining the wind deflection design wind speed of a power transmission tower, in particular to a method for determining the wind deflection design wind speed of a power transmission tower considering the combined distribution of lightning wind speed. Background technique [0002] Transmission lines are prone to lightning shielding and wind flashover. In order to ensure the safe operation of transmission lines, the power department conducts simulation analysis for transmission towers under different operating conditions, and guarantees system and personal safety under different operating conditions below the design wind speed. According to the power transmission line design manual, the insulation coordination design at the tower head is based on the calculation of power frequency overvoltage, operating overvoltage and lightning overvoltage to determine the insulator form, number of pieces and the air gap distance betwe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 苏盛陈晓国陈浩洪亮刘亮金晟付青杜章华刘元
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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