A method and system for stratified and refined prediction of adjacent grid temperature

Abstract

The invention relates to the field of transmission line equipment maintenance, and discloses a layered and refined prediction method and system for adjacent grid temperatures to improve the vertical temperature resolution of galloping points, with high accuracy, fast calculation speed and wide range. The present invention first calculates the temperature of the ground altitude corresponding to the ground altitude of the dancing point to be analyzed in the vertical direction of the adjacent grid points in the corresponding series of grids according to the direct reduction rate of the ground temperature and the relevant temperature data, and then according to the calculated values ​​of the temperatures in double The linear interpolation method calculates the temperature at the ground altitude of the dancing point to be analyzed; at the same time, according to the vertical temperature drop rate between any adjacent grids of the associated grid point, the weighted average method is used to calculate the temperature between the dancing points corresponding to the adjacent grids. The vertical temperature lapse rate; finally, the temperature data corresponding to each subdivided layer is calculated according to the temperature at the ground altitude of the dancing point to be analyzed and the vertical temperature lapse rate between each adjacent grid.

Description

technical field [0001] The invention relates to the field of maintenance of transmission line equipment, in particular to a method and system for stratified and refined prediction of adjacent grid temperature. Background technique [0002] In recent years, the scale of the power grid has expanded rapidly, and transmission lines inevitably pass through ice-covered and galloping areas. Ice-coated galloping will cause damage to hardware, disconnection and other problems, and in severe cases, it will also cause tower collapse, which seriously threatens the safe operation of the vast power grid. . [0003] With global climate change and frequent occurrence of various disasters, the problem of grid icing galloping has become more prominent, which has promoted the rapid development of icing galloping prediction technology, and grid icing galloping forecast has been transformed from traditional small-scale empirical forecasting to larger-scale numerical values Forecasting, however,...

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Problems solved by technology

[0002] In recent years, the scale of the power grid has expanded rapidly, and transmission lines inevitably pass through ice-covered and galloping areas. Ice-coated galloping will cause damage to hardware, disconnection and other problems, and in severe cases, it will also cause tower collapse, which seriously threatens the safe operation of the vast power grid.

[0003] With global climate change and frequent occurrence of various disasters, the problem of grid icing galloping has become more prominent, which has promoted the rapid development of icing galloping prediction technology, and grid icing galloping forecast has been transformed from traditional small-scale empirical forecasting to larger-scale numerical values Forecasting, however, studies have found that ice-covered galloping of power grids often occurs under light ice conditions, and the calculation of light ice not only puts forward higher requirements for fine-grained forecasting of the temperature on the ground, but also on the high altitude; The predictions are all on regular grid points. However, in actual situations, the distribution of icing and galloping points on the power grid is discrete, and they are often located in regular grids. For such discrete non-grid point calculations, it is difficult for the numerical model to be completely accurate. Applicable, it needs to be calculated by interpolation

Traditional temperature fine-grained interpolation mainly uses statistical methods, which do not take into account the physical laws of vertical temperature changes, resulting in errors in calculation results

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