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Method, system and device for forecasting near-ground wind speed of overhead lines in winter

A wind speed prediction and overhead line technology, applied in the field of electric power engineering, can solve the problems of isobaric surface height not equal to altitude, coarse wind speed accuracy and spatial resolution, large isobaric surface interval, etc., to achieve strong practicability and clear thinking , the effect of high accuracy

Active Publication Date: 2020-09-01
STATE GRID HUNAN ELECTRIC POWER +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the meteorological department mainly releases the conventional surface wind field forecast in densely populated areas, and the wind speed accuracy and spatial resolution are relatively coarse. The forecast results of the meteorological numerical model are the ground 10-meter wind speed and the wind field on different isobaric surfaces, and the isobaric surface intervals are large. , and the height of the isobaric surface is not equal to the altitude, and the vertical resolution does not meet the demand for galloping prediction; therefore, there is an urgent need for a refined prediction method for near-surface wind speed in winter on overhead lines in plain areas that are prone to galloping

Method used

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  • Method, system and device for forecasting near-ground wind speed of overhead lines in winter
  • Method, system and device for forecasting near-ground wind speed of overhead lines in winter
  • Method, system and device for forecasting near-ground wind speed of overhead lines in winter

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Embodiment 1

[0023] This embodiment discloses a method for predicting wind speed near the ground in winter for overhead lines, such as figure 1 shown, including:

[0024] Step S1, meshing the area to be analyzed.

[0025] Step S2, obtaining the historical data of each grid, the historical data includes at least surface meteorological data, when any grid has a wind measuring tower and / or a radiosonde station, the historical data also includes the corresponding wind measuring tower and / or Sounding station meteorological data.

[0026] Step S3. Calculate the vertical shear coefficient of near-surface wind speed for each time of the grid where the wind-measuring tower is located according to the meteorological data of the wind-measuring tower and the corresponding surface meteorological data, and calculate the vertical shear coefficient of near-surface wind speed for each time according to the minimum The wind speed corresponding to the observation height is divided into at least two wind gr...

Embodiment 2

[0062] Corresponding to the above method embodiments, this embodiment discloses a winter near-surface wind speed prediction system for overhead lines, which at least includes:

[0063] The first processing unit is configured to perform grid division on the area to be analyzed;

[0064] The second processing unit is used to obtain the historical data of each grid. The historical data includes at least surface meteorological data. When any grid has wind measuring towers and / or sounding stations, the historical data also includes corresponding wind measuring Tower and / or sounding station meteorological data;

[0065] The third processing unit is used to calculate the vertical shear coefficient of the near-surface wind speed for each time of the grid where the wind-measuring tower is located according to the meteorological data of the wind-measuring tower and the corresponding surface meteorological data, and calculate the vertical shear coefficient of the near-surface wind speed ...

Embodiment 3

[0069] This embodiment discloses a device, specifically a computer-readable storage medium storing a computer program, wherein the computer program causes a computer to execute the relevant method steps in the foregoing method embodiments.

[0070] To sum up, the method, system and device for forecasting wind speed near the ground of overhead lines in winter disclosed in this embodiment can realize refined forecasting of wind speed at the height of overhead lines, with clear thinking, strong practicability, and high accuracy; it is especially suitable for overhead lines in plain areas. Refined prediction of near-surface wind speed along the line in winter.

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Abstract

The invention relates to the technical field of electric power engineering and discloses a prediction method, system and apparatus for a near surface wind velocity of an overhead line in winter. The wind velocities of other heights of a near surface are subjected to refined prediction according to surface meteorological prediction data. The method comprises the steps of calculating a near surface wind velocity vertical shear coefficient of a grid where a wind measurement tower is located at each time according to historical data, dividing the calculated near surface wind velocity vertical shear coefficients into at least two wind groups, and calculating an average value of the near surface wind velocity vertical shear coefficients of each wind group; calculating a near surface wind velocity vertical shear coefficient of a grid where a rawinsonde station is located at each time according to the historical data, dividing the calculated near surface wind velocity vertical shear coefficients into at least two wind groups, and calculating an average value of the near surface wind velocity vertical shear coefficients of each wind group; and performing calculation according to the current surface meteorological prediction data and the associated average value of the near surface wind velocity vertical shear coefficients, thereby obtaining the wind velocities of other vertical heights of the grid.

Description

technical field [0001] The invention relates to the technical field of electric power engineering, in particular to a method, system and device for predicting near-ground wind speed of overhead lines in winter. Background technique [0002] At present, the winter lines in the plains of our country are prone to slight icing and stable wind field. Under the joint action of the two, overhead lines are prone to galloping, which leads to power grid disasters such as line tripping and hardware damage, which has become a prominent problem that threatens power grid security. one. The stable wind field is one of the key factors for line galloping, so it is necessary to accurately predict the near-surface wind field near the overhead line. [0003] The near-surface wind field is greatly affected by ground obstacles and ground friction. The closer to the surface, the greater the influence of the ground. As the height increases, the influence of the ground gradually decreases, resultin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 陆佳政李丽方针李波徐勋建郭俊杨莉邸悦伦冯涛
Owner STATE GRID HUNAN ELECTRIC POWER