Power transmission line windage yaw calculation method based on mountainous region microtopography special wind field
A technology of transmission lines and calculation methods, applied in the field of power transmission lines, can solve problems such as tower collapse, wind deflection angles that do not take into account the influence of wind speed on complex mountainous terrain, fluctuating characteristics of wind speed, wind deflection flashover, etc.
Pending Publication Date: 2019-08-16
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +4
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Problems solved by technology
Under the influence of strong wind, the transmission line structure will bear excessive wind load, which will cause accidents such as tower collapse, wind deflection flashover, etc., and even lead to the collapse of the entire transmission system, threatening the safety of the power grid and the reliability of power supply for users
[0003] Due to geographical constraints, many transmission lines inevitably pass through complex mountainous terrain. The calculation of wind deflection angle in the traditional windproof design of transmission lines does not take into account the influence of complex mountainous terrain on wind speed and the fluctuating characteristics of wind speed. With the economic With the development of technology and the continuous expansion of the grid scale, the traditional wind angle calculation is gradually difficult to adapt to the current complex power transmission environment, which makes the occurrence of accidents show an intensifying trend
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[0083] The specific embodiment of the present invention is as figure 1 The calculation process of the wind deflection angle of the transmission line under the mountainous terrain is shown, which is applicable to the calculation of the wind deflection angle of the transmission line under most mountainous terrains.
[0084] In this embodiment, the steps for calculating the wind deflection angle of a transmission line in a mountainous environment are as follows:
[0085] 1) Collect and sort out the basic data required for wind deflection of transmission lines (including tower height difference, conductor gravity, suspension insulator string related data, etc.)
[0086] 2) According to the on-site situation of the location of the transmission line such as the direction of the line, confirm whether the transmission line is erected in the mountainous area whether it is erected along the mountain or across the mountain.
[0087] 3) In the case of erection along the mountain, determi...
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The invention discloses a power transmission line windage yaw calculation method based on a mountainous region microtopography special wind field. The method comprises the steps: erecting the mountainpower transmission line along a mountain and across the mountain; according to different height sections under two conditions, correcting the obtained calculated wind speed by adopting different windspeed correction coefficients verified by experimental simulation under the mountain environment to obtain the wind speed closer to the actual mountain environment; considering the superposition effect of the icing and mountain wind field effect, obtaining the wind deviation calculation method for the mountain micro terrain where the power transmission line is located by adopting the icing gravity correction coefficient and the icing body type correction coefficient of the combined action of the verified mountain wind effect and the verified icing condition. The method is suitable for most power transmission lines in typical mountain microtopography, and technical and economic indexes of windage yaw fault prevention work and mountain power transmission line design are optimized.
Description
technical field [0001] The invention relates to a method for calculating the wind deflection of a power transmission line based on a special wind field of mountain micro-topography, belonging to the technical field of electric power transmission lines. Background technique [0002] Because most of the transmission lines are erected in open places, they are easily affected by strong winds. Under the influence of strong wind, the transmission line structure will bear excessive wind load, which will cause accidents such as tower collapse, wind deflection flashover, etc., and even lead to the collapse of the entire transmission system, threatening the safety of the power grid and the reliability of power supply for users . [0003] Due to geographical constraints, many transmission lines inevitably pass through complex mountainous terrain. The calculation of wind deflection angle in the traditional windproof design of transmission lines does not take into account the influence ...
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Login to View More IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 周龙武邵戎饶斌斌邹丹旦张宇马建国程巍胡京邹建章况燕军李帆
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST