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An overhead transmission line icing flashover trip-out probability calculation method

An overhead transmission line and icing flashover technology, applied in the electric power field, can solve the problems of few research results on the risk of icing flashover tripping, etc., and achieve the effect of deepening real-time monitoring capabilities, realizing real-time evaluation, and reducing losses

Active Publication Date: 2019-04-16
NORTHWEST BRANCH OF STATE GRID POWER GRID CO
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AI Technical Summary

Problems solved by technology

[0003] At present, there are many researches on the icing risk of overhead transmission lines in online icing monitoring and large-scale ice thickness prediction and early warning, but there are few research results in refined overhead transmission lines icing flashover risk.

Method used

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  • An overhead transmission line icing flashover trip-out probability calculation method
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  • An overhead transmission line icing flashover trip-out probability calculation method

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Embodiment Construction

[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0043] Such as figure 1 As shown, the overhead power transmission li...

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Abstract

The invention discloses an overhead transmission line icing flashover trip-out probability calculation method. Based on the research on the icing flashover mechanism and development trend of the overhead transmission line, the icing flashover trip probability model of the overhead transmission line is established by taking the icing online monitoring data and the real-time monitoring data of the overhead transmission line over the years as objects and comprehensively utilizing fuzzy evaluation, mathematical statistics and other methods to evaluate the icing development stage. A line icing stage division model is established through a fuzzy evaluation method, line icing stage division model parameters are calculated through a fuzzy C-means clustering method, and an icing flashover trip-outprobability calculation model is established on the basis of research on icing thickness and flashover probability. The method can effectively support overhead transmission line differentiation processing, and is of great significance for improving the on-site lean operation and maintenance level and improving the safe operation performance of power grid equipment.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for calculating the probability of ice-covered flashover tripping of overhead transmission lines. Background technique [0002] Under suitable temperature, humidity, rain, snow, terrain and other conditions, overhead transmission lines are prone to attach a layer of nearly oval ice sheath on the surface of insulators, conductors, and ground wires, that is, overhead transmission lines are covered with ice. The icing of overhead transmission lines will reduce the creepage distance of insulators, increase the conductivity of insulators, and even lead to flashover tripping, which seriously threatens the safety and stability of power grid operation. With the large-scale construction of UHV AC and DC power grids in recent years and the continuous improvement of backbone grids in supporting areas, the total mileage of overhead transmission lines has continued to increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2111/08G06F30/20Y04S10/50
Inventor 杨楠张兴科王智伟崔伟牛拴保李武璟
Owner NORTHWEST BRANCH OF STATE GRID POWER GRID CO
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