Typical galloping microtopography classification method and system based on empirical orthogonal function analysis

A technology of empirical orthogonal function and classification method, which is applied in the field of classification method and system of typical galloping micro-topography, can solve problems such as unclearness, wind direction, wind speed change, and galloping of transmission lines, and achieves strong practicability and accuracy. High, clear thinking effect

Pending Publication Date: 2021-12-21
STATE GRID HUNAN ELECTRIC POWER +2
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  • Claims
  • Application Information

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Problems solved by technology

However, in actual production, it is found that in some hilly and mountainous areas, due to the influence of local terrain, the wind direction and wind speed change, and the transmission line is also prone to galloping in some local micro-terrain areas.
[0003] However, the current research only proposes the concept of galloping micro-topography. It is not clear which terrains are galloping micro-topography and what characteristics these galloping micro-topography have. Therefore, it cannot effectively support the galloping prediction of transmission lines in micro-topography areas.

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  • Typical galloping microtopography classification method and system based on empirical orthogonal function analysis
  • Typical galloping microtopography classification method and system based on empirical orthogonal function analysis

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Embodiment 1

[0029] see figure 1 , the classification method of the typical galloping micro-topography based on the empirical orthogonal function analysis method of the present embodiment, comprises the following steps:

[0030] (1) Basic data collection.

[0031] Collect digital elevation data with a resolution of 30 meters in a specific area and historical transmission line galloping trip data in the area. Including the location of the dancing trip point, the number of trips and the corresponding time, and the latitude and longitude of the dancing trip point.

[0032] (2) Terrain data processing in the dancing micro-terrain area.

[0033] According to the location of the galloping trip point of the transmission line, the galloping center location data set T(t, 2) is established, where t is the number of historical galloping trip points, and 2 is the longitude and latitude of the trip point.

[0034] With each galloping trip point as the center, delineate a 3km×3km grid, and the axis o...

Embodiment 2

[0047] In this embodiment, a certain area in Shanxi, China is taken as an example. The typical dancing micro-terrain classification method based on the empirical orthogonal function analysis method of the present embodiment comprises the following steps:

[0048] (1) Basic data collection.

[0049]Collect digital elevation data with a resolution of 30 meters in Shanxi, China, and collect tripping data of transmission lines in Shanxi for the past ten years.

[0050] (2) Terrain data processing in the dancing micro-topography area.

[0051] According to the location of galloping trip points of transmission lines in Shanxi in the past ten years, a data set T(69,2) of the galloping center location is established, where 69 is the number of galloping trips in history, and 2 is the longitude and latitude of the trip point.

[0052] With each galloping trip point as the center, delineate a 3km×3km grid, and the axis of the grid is north-south and east-west. In this 3km×3km grid, the...

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Abstract

The invention discloses a typical galloping microtopography classification method and system based on empirical orthogonal function analysis. The method comprises the following steps: collecting digital elevation data of a first resolution in a set area range and historical transmission line galloping tripping data; dividing grids by taking each galloping tripping point as a center to obtain a terrain height data matrix in the corresponding grid; performing empirical orthogonal function analysis according to the terrain height data matrix, and decomposing the terrain height data matrix into a spatial matrix representing spatial modal distribution and a time matrix representing a sequence; the front N feature vectors of the space matrix are extracted N typical microtopography modes; and extracting time coefficients corresponding to the first N feature vectors from the time matrix representing the sequence, and dividing the microtopographic region into N classes according to the time coefficients of the first to Nth feature vectors to obtain microtopographic classes of the microtopographic region. According to the method, the topographic features of the typical galloping microtopography can be extracted under the condition that the topographic types are not preset.

Description

technical field [0001] The invention relates to the technical field of power grid protection, in particular to a classification method and system for typical galloping micro-topography based on empirical orthogonal function analysis. Background technique [0002] Galloping of overhead transmission lines refers to a low-frequency and large-amplitude self-excited oscillation that occurs on lightly iced transmission lines under the excitation of wind. Stable wind excitation is a necessary condition for line galloping to occur, so transmission line galloping mostly occurs in flat and open areas with stable wind speeds (such as central Hubei, central Henan, and the Bohai Rim). However, in actual production, it is found that in some hilly and mountainous areas, due to the influence of local terrain, the wind direction and wind speed change, and the transmission line is also prone to galloping in some local micro-terrain areas. [0003] However, the current research only proposes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06F18/24
Inventor 李丽徐勋建郭俊冯涛蔡泽林叶钰
Owner STATE GRID HUNAN ELECTRIC POWER
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