Equivalent icing thickness monitoring method based on accurate measurement of conductor sag change

Abstract

The invention discloses an equivalent icing thickness monitoring method based on accurate measurement of conductor sag change, wherein the method comprises the steps: selecting a span section of a to-be-monitored power transmission line in an icing area, collecting rod tower nominal height, line span and topographic feature original data, and obtaining position information and basic information of wire icing on-line monitoring; mounting a laser tracking device on a tower body of a rod tower, and mounting a laser capturing and reflecting device at the lowest sag point of a wire to collect the lowest sag of the wire; establishing a line state equation containing sag change of the topographic position of the selected power transmission line under various weather conditions, and obtaining a sag change curve taking a ground base point and a rod tower body laser emission point as reference positions; establishing a mathematical model for monitoring the relationship between the line segment sag change and the ice thickness; and obtaining an equivalent icing thickness value according to the relationship between the sag change and the equivalent icing thickness. The technical problem that in the prior art, stable and accurate on-line monitoring of power transmission line icing cannot be achieved is solved.

Description

technical field [0001] The invention belongs to the technical field of ice coating thickness monitoring, in particular to an equivalent ice coating thickness monitoring method based on accurate measurement of wire sag changes. [0002] technical background [0003] The icing of transmission lines seriously endangers the safe operation of the power grid. However, there is no method to accurately monitor the thickness and state of icing on transmission line conductors at home and abroad. The current typical icing monitoring methods include mechanical measurement, icing prediction, and image analysis. Processing method, simulated wire method, etc. The mechanical measurement method calculates the equivalent ice thickness of the wire by measuring the stress and inclination angle of the suspension end according to the axial stress change after the wire is iced. This method has a simple structure and accurate measurement, but the stability of the tension sensor in a low temperature ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for monitoring equivalent ice coating thickness based on accurate measurement of wire sag changes, so as to solve technical problems such as stable and accurate on-line monitoring of transmission line ice coating that cannot be realized in the prior art

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