Power transmission line equivalent icing thickness monitoring method

Abstract

The invention relates to a power transmission line equivalent icing thickness monitoring method. The method comprises the steps that according to axial tension, dip angles and other line status information of insulator chains and wind speed, wind directions, temperature, humidity and other weather information, information fusion is conducted through multisource sensors to qualitatively judge icing conditions first, wherein the influences of the temperature and stress on the lengths of wires are comprehensively considered; a vertical comprehensive load, a horizontal wind load and a vertical wind load of a line are calculated according to the stress of suspension points of the insulator chains; the self weight of the wires and an ice load of the line are solved according to the special situations that the virtual lowest point of the wires falls outside the span distance and the lowest point of the wires on a windage yaw plane deviates; a static equilibrium equation is established in the vertical direction of the windage yaw plane, and an equivalent icing thickness is solved in a loop iteration mode. Compared with the prior art, the method has the advantages that the calculation accuracy is high, and the convergence rate is high.

Description

technical field [0001] The invention relates to the field of transmission line monitoring, in particular to a method for monitoring the equivalent ice thickness of a transmission line. Background technique [0002] Affected by micro-topography and micro-meteorological conditions, icing of transmission lines is widespread in my country, especially in southern my country such as Hunan and Guizhou, where accidents such as disconnection, tower collapse, and flashovers caused by icing disasters frequently occur. Since the 1950s, there have been thousands of icing accidents of varying degrees on transmission lines in my country. Moreover, the icing areas of transmission lines are usually located in places that are difficult for people to reach, such as passes, mountain watersheds, canyons, and rivers. It is difficult to judge In the actual situation of icing, it is extremely difficult to repair when a problem occurs, which seriously affects the normal operation of the transmission ...

AI Technical Summary

Problems solved by technology

[0003] At present, the typical ice thickness and ice monitoring methods are mostly based on the weighing method. The wind speed and direction sensors used are based on the two-dimensional horizontal plane to collect wind speed and direction, which cannot accurately collect the actual wind speed and direction, so the horizontal wind load and vertical wind load cannot be accurately calculated. The impact on the transmission line, the detected ice thickness error is large

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