Novel power grid disastrous strong wind early warning method

A technology for power grid disasters and strong winds, applied in data processing applications, instruments, calculations, etc., can solve problems such as power grid paralysis, large wind damage risks, and inaccurate early warning results, so as to reduce losses and improve forecasting capabilities.

Pending Publication Date: 2020-09-01
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

It will cause damage to the transmission tower, such as blowing off the wire, blowing down the tower, etc., and further cause wire vibration, wind deflection discharge, etc., and cause line tripping under the action of strong wind or squall wind; and other meteorological disasters such as lightning. Compared with tripping, if the wind force does not weaken, the wind deflection discharge will continue to occur repeatedly. The success rate of reclosing after the line trip caused by the wind deflection discharge is low, which seriously affects the safe operation of the transmission network and may cause large-scale paralysis of the power grid.
[0003] There are two existing early warning methods for catastrophic winds in power grids. One is to give warning levels based on weather forecast information. This method covers a large area, but the specific topography and landforms have different destructive power to the formation and generation of strong winds; for example, in The leeward area and the face wind area, at the same time, are adjacent to the location, the risk of strong wind damage is very different. Another method is to use local radar and other micro-climate conditions to give a strong wind warning level, but this method does not take into account the differences in terrain and terrain, facility installation and wind resistance of power facilities, and the warning results given not precise

Method used

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  • Novel power grid disastrous strong wind early warning method

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Embodiment 1

[0051] In one embodiment, the power grid of a certain city adopts the novel power grid catastrophic wind early warning method provided by the present invention to carry out early warning to the power facilities in the city in a certain strong wind process; ) the short-term wind speed and direction forecast every 2 hours, the design maximum wind speed of a certain tower in a certain area of ​​the city is v 0 = 32m / s, the highest wind resistance level is 11; the early warning process is as follows: first obtain the basic wind speed v through the weather forecast b = 20m / s, and the wind force level is 8. Further, the wind speed adjustment factor α caused by micro-meteorological conditions is obtained according to the weather radar around the tower, and a more accurate wind speed v is obtained after calculation. b1 = 22m / s, further calculate the wind speed correction coefficient β under specific terrain conditions according to the recorded basic information of the tower, for examp...

Embodiment 2

[0053] In another embodiment, a tower located in a basin can withstand a maximum wind speed of v 0 =32m / s, the highest wind resistance level is 11, and the weather forecast shows that the wind speed in this area reaches v in a certain period of time b = 30m / s, the wind force level is level 11, if the traditional early warning method is used, the level I early warning will be issued, but since the tower is located in a basin, the terrain correction coefficient is small, and the adjusted wind speed is further calculated according to the micro-meteorological conditions and other conditions. v b1 = 20m / s, the wind power level is 8, and the warning index after calculation is 3, which should be a level III warning. In fact, there is no need for station protection of electric workers, so this method can save manpower and material resources; further, it can Count the historical early warning data of this early warning method in a certain area, and then correct the threshold value acc...

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Abstract

The invention discloses a novel power grid disastrous strong wind early warning method. The invention relates to the field of power grid wind disaster early warning and disaster prevention and reduction. The method is realized through the following steps: carrying out dynamic downscaling model calculation on original weather forecast data; carrying out gridding post-processing by applying refinedmeteorological data output by dynamic downscaling; meanwhile, performing matching with line tower information; obtaining strong wind forecast data of a grid point to which a line tower belongs; and comparing the actual wind speed with the designed wind resistance grade of the tower, judging the early warning grade, generating the highest grade early warning information according to the ratio of the actual wind speed to the designed wind resistance grade when the actual wind speed in the grid point to which the tower belongs reaches 100% or above of the designed wind resistance wind speed of the tower, and displaying the highest grade early warning information through a power grid GIS platform. According to the invention, through a dynamic downscaling model of the weather forecast data, refined matching of a power grid line tower and grid point data is realized.

Description

technical field [0001] The invention relates to the fields of wind disaster early warning, disaster prevention and mitigation for power grids, and in particular to a novel method for early warning of catastrophic winds in a power grid, which can generate line early warning information for catastrophic winds in combination with actual grid operations. Background technique [0002] Years of power grid operation experience show that all kinds of power transmission and transformation equipment are exposed to the atmospheric environment for a long time, and are vulnerable to various meteorological disasters such as thunderstorms, wind disasters, geological disasters, etc. It presents the characteristics of many types of disasters and different degrees of damage; one of the meteorological disasters that is extremely harmful to the safety of transmission lines is wind disasters, such as strong gusts, squall lines, and typhoons. It will cause damage to the transmission tower, such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06Y04S10/50
Inventor 张廼龙贾勇勇刘洋陈杰赵恒胡成博刘子全陈舒
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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