Strain tower power transmission line equivalent icing thickness measurement method and system

Abstract

The invention discloses a strain tower power transmission line equivalent icing thickness measurement method and system, and the method comprises the steps: building a finite element simulation model of a power transmission line, and obtaining the first strain string axial tension and the second strain string axial tension at the head end and the tail end of a strain section under an icing-free working condition; applying an icing load to the finite element simulation model to obtain a corresponding third tension string axial tension and a fourth tension string axial tension; when the first tension monitoring value is greater than the first tension string axial tension and the second tension monitoring value is greater than the second tension string axial tension, calculating a first equivalent icing thickness and a second equivalent icing thickness of the power transmission line; and determining the arrangement position of the tension sensor based on the comparison result of the first equivalent icing thickness, the second equivalent icing thickness and the icing thickness theoretical value, and calculating the final equivalent icing thickness by adopting a weighing method. According to the invention, the error of the icing thickness calculation result can be reduced, so that the icing monitoring accuracy of the power transmission line is improved.

Description

technical field [0001] The invention relates to the field of icing monitoring of transmission lines, in particular to a method and system for measuring the equivalent icing thickness of transmission lines of tension towers. Background technique [0002] The icing of transmission lines seriously affects the safe and stable operation of the power grid. The emergence of extreme weather conditions makes frequent occurrence of large-scale icing incidents on transmission lines, resulting in accidents such as transmission line disconnection, conductor dancing, tower collapse, and insulator flashover. Cause huge economic property loss. Due to the great harm caused by icing, it is more and more urgent to carry out icing monitoring of transmission lines. Due to its simple principle and mature technology, the weighing method has been widely used in domestic power grid icing monitoring and has gradually become an industry standard. The tension sensor is a key component in the applicat...

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Problems solved by technology

[0003] The invention provides a method and system for measuring the equivalent ice coating thickness of the transmission line of the tension tower to solve the problem of large error between the calculation result of the ice coating and the actual value in the prior art, and the invention can reduce the error of the calculation result of the ice coating thickness errors, thereby improving the accuracy of transmission line icing monitoring and avoiding false alarms in the early warning of icing monitoring systems

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