Power transmission and transformation equipment ice coating disaster monitoring and forecasting method based on meteorological and topographic factors

A technology of power transmission and transformation equipment and topographical factors, which can be used in forecasting, climate sustainability, instruments, etc., and can solve problems such as rough icing design

Inactive Publication Date: 2015-12-16
STATE GRID CORP OF CHINA +2
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, when design units design circuits, they mainly rely on experience, and the design of icing is relatively rough.

Method used

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Embodiment Construction

[0022] In order to better understand the technical solutions of the present invention, specific implementation cases are used for further description.

[0023] (1) Collection of meteorological and terrain data

[0024] Collect conventional meteorological element observation data and 0-72 hour meteorological element grid forecast data in the commissioned place, including: air pressure, air temperature, water vapor pressure, relative humidity, precipitation, evaporation, wind speed and other meteorological elements, as well as temperature data at different altitudes ; Geographical information such as altitude, river network information, slope, aspect, slope variability, slope aspect variability, undulation, roughness, and surface illumination of the entrusted site.

[0025] (2) Establish a meteorological model for estimating ice thickness

[0026] The meteorological elements on the icing day will play a decisive role in the occurrence and thickness of the icing, but the charact...

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Abstract

A power transmission and transformation equipment ice coating disaster monitoring and forecasting method based on meteorological and topographic factors comprises the following steps of: S1, collecting meteorological and topographic data comprising geographic information such as a sea level elevation, river network information, a slope, an exposure, slope variability, exposure variability, a waviness, a roughness, a surface illumination degree and the like; S2, establishing an ice coating thickness estimation meteorological model, wherein the meteorological model is as follows: Y=-0.11x1-0.49x2-0.34x3-0.335x4+0.00x5-0.013x6+0.27x7+1.75x8; S3, carrying out topographic correction of the ice coating thickness estimation meteorological model and carrying out contrastive analysis on an ice coating thickness increment and a difference value of an actually measured value and a meteorological model estimated value, which are obtained by utilizing the formulas, wherein a topographic correction model is as follows: delta Y'=0.19+0.0014x1-0.0035x2+0.045x3; S4, adding the meteorological model in the step 2 with a topographic correction model in the step 3 to obtain a final ice coating thickness comprehensive correction model, completing monitoring on ice coating thickness distribution and carrying out forecasting on the basis of an obtained result. The method considers influence of microtopography and micrometeorology on monitoring of a power transmission and transformation equipment ice coating disaster and has the advantages of high accuracy, high practicality, high reliability and the like.

Description

technical field [0001] The invention relates to meteorological disaster monitoring and forecasting methods, in particular to a method for quantitatively judging ice thickness based on meteorological and terrain factors, and the method is especially used for monitoring and forecasting ice-covering disasters of power transmission and transformation equipment. Background technique [0002] According to relevant information, the design ice thickness of the transmission line is increased by 10mm, and the steel material is increased per kilometer: 220kV is nearly doubled; 500kV is about 24 tons. Reasonable determination of ice thickness has always been an important issue in line design, which is directly related to the anti-ice load capacity and investment of the line. At present, design units mainly rely on experience when designing lines, and icing design is relatively rough. Due to the continuous emergence of ice damage accidents in the power grid, it is required to carry out ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/06
CPCY02A90/10
Inventor 黄俊杰周悦周月华高正旭阮羚熊宇
Owner STATE GRID CORP OF CHINA
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