Multi-span overhead transmission line icing shape finding calculation method based on static balance

Abstract

The invention provides a multi-span overhead transmission line icing shape finding calculation method based on static balance, and belongs to the field of transmission lines. The technical problem tobe solved is to provide a method for directly solving the shape finding of a multi-span overhead transmission line in the icing state and calculating the stress of the overhead transmission line in the icing state by constructing a method for finding the shape of the multi-span overhead transmission line in the icing state. The technical scheme for solving the technical problem is as follows: reading basic data, icing parameters and other information of the multi-span overhead transmission line, calculating the horizontal stress of the overhead transmission line and the deflection angle of theinsulator string, constructing a multi-span overhead transmission line icing shape finding method, solving the increment of the horizontal stress of the overhead transmission line and the deflectionangle of the insulator string under icing, and constructing the icing shape of the multi-span overhead transmission line through the calculated data. The method can be widely applied to the power transmission line field.

Description

technical field [0001] The invention relates to a form-finding calculation method for icing of multi-span overhead transmission lines based on static force balance, and belongs to the technical field of transmission lines. Background technique [0002] Today, with the rapid economic development, electric energy has become an indispensable resource for social development and people's normal life. As an important lifeline project, the safe operation of transmission lines has been widely valued. Icing of transmission lines is one of the important factors affecting the safety of power systems. In order to ensure the safety and stability of the national power transmission network, it is necessary to carry out a reasonable design of the overhead transmission line. Whether the overhead transmission line is safe and stable when it is subjected to ice loads and how to remove the overhead transmission line after being iced is a must when designing lines in heavy ice areas. Condition...

AI Technical Summary

Problems solved by technology

[0004] Regarding the form-finding methods of conductors, there are currently some form-finding methods for single-span conductors, including direct iteration method, small elastic modulus method and prefabricated model update method, etc.; for multi-span overhead transmission lines with straight towers in the middle , because the insulator strings in the middle straight tower can swing off-angle, the existing single-span form-finding method cannot be used

The commonly used multi-span form-finding methods include the representative span method, but the representative span method has relatively low accuracy; most of the other multi-span form-finding methods are based on finite element software. When parameters such as span, sag and ice thickness need to be changed, remodeling is required, which is a huge workload and inconvenient

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