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Numerical prediction method and system for micro-terrain icing cycle correction

A numerical prediction and micro-topography technology, which is applied in image data processing, special data processing applications, 3D modeling, etc., can solve the problem of inaccurate micro-topography icing prediction, and achieve improved icing prediction effect, rapid integration, and universal good sex effect

Pending Publication Date: 2021-01-05
STATE GRID HUNAN ELECTRIC POWER +2
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  • Application Information

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Problems solved by technology

[0004] The invention provides a numerical prediction method and system for micro-topography icing cycle correction, which is used to solve the technical problem of inaccurate prediction of micro-topography icing under extreme meteorological conditions

Method used

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  • Numerical prediction method and system for micro-terrain icing cycle correction
  • Numerical prediction method and system for micro-terrain icing cycle correction
  • Numerical prediction method and system for micro-terrain icing cycle correction

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Embodiment 1

[0067] Taking the prediction and correction of ice-covered micro-topography of a typical 220kV line in a certain area as an example, the specific calculation process is as follows:

[0068] (1) Micro terrain icing prediction model construction and monitoring process settings:

[0069] Select the prediction area F and divide it into three-dimensional spatial grids, among which there are 3 east-west grids, 3 north-south grids, and 3 vertical grids, and the coordinates of each grid point are specified as (i, j , k), where i ∈ [1, 3], j ∈ [1, 3], k ∈ [1, 3].

[0070] According to the topography, vegetation, and climate characteristics of the area F, the micro-topographic icing numerical calculation model I is configured, and the ice-covering start time is set as 0 time, and the forecast period is 24 hours.

[0071] Establish the monitoring data collection interface of the prediction area F. In the area F, there is a total of 1 observation point, recorded as O1, and the location i...

Embodiment 2

[0096] The present invention also provides a computer system, including a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the computer program, the steps in any of the above embodiments are realized.

[0097] In summary, the present invention realizes rapid fusion of icing monitoring and prediction by continuously updating the intermediate data in the icing prediction calculation process; overcomes the limitation of single-correction model forecasting, and can realize precise correction of micro-terrain icing.

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Abstract

The invention discloses a numerical prediction method and a system for micro-terrain icing cycle correction. The method comprises the steps that dividing a to-be-predicted area into three-dimensionalspace grids; collecting the position information of a plurality of observation points in the to-be-predicted area, and obtaining the observation value of icing; obtaining icing space distribution at the initial moment according to the icing observation data set at the initial moment of the plurality of observation points; constructing a relation model of the icing observation data set and the three-dimensional space grids through multiple observations, and obtaining a mapping value from an observation value of the observation point to the icing thickness of each grid point; inputting the icingthickness of each grid point at the initial moment into a micro-terrain icing numerical calculation model for prediction, and setting output time of a plurality of process data to obtain prediction process data of icing of each grid point; and cyclically updating the prediction process data according to the mapping value, thereby minimizing the deviation between the calculation result and the observation result. According to the method, the limitation of single correction model prediction is overcome, and accurate correction of micro-terrain icing can be realized.

Description

technical field [0001] The invention relates to the field of transmission line protection, in particular to a numerical prediction method and system for micro-terrain icing cycle correction. Background technique [0002] As the coverage of the power grid continues to expand, overhead transmission lines often pass through micro-terrain areas such as mountains and canyons. In winter, local areas are frequently covered with ice, especially when important power lines are covered with ice, which will seriously affect the safety of power supply. [0003] At present, the prediction methods for micro-terrain icing mainly use the historical icing observation data in this area to construct icing statistical models or physical models for calculation. However, the calculated results often have certain deviations from the actual ones, and further corrections are needed. The existing correction methods are mainly based on human experience, but human subjectivity is strong, and empirical ...

Claims

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Application Information

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IPC IPC(8): G06F30/18G06T17/20
CPCG06F30/18G06T17/205
Inventor 冯涛蔡泽林徐勋建郭俊李丽叶钰邸悦伦
Owner STATE GRID HUNAN ELECTRIC POWER
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