A type selection method of cable line steel support based on life cycle cost assessment

Abstract

A method for assessing the life cycle cost of a cable line steel support. This method is aimed at the steel support. Through the calculation of the steel support stress of the cable gravity load, the corresponding support structure and the equipment material cost can be obtained. On this basis, the initial cost can be calculated. The equipment cost in the investment cost; the induced eddy current and its power loss on the steel support can be calculated through the electromagnetic field, and the increased operating cost can be calculated on this basis; through the coupling numerical calculation of the electromagnetic field, the flow field and the temperature field, Obtain the temperature change on the steel support, and then calculate the corrosion rate of the steel support according to 7 factors such as air humidity in the tunnel, and on this basis, calculate the increased operation and maintenance cost; combine these factors and apply the whole The life cycle cost theory evaluates the economy of cable lines, and provides a new idea and theoretical basis for the design and selection of support for cable lines.

Description

technical field [0001] The invention discloses a steel support type selection method for cable lines based on full life cycle cost assessment, and relates to the theoretical research fields of power transmission line engineering and full life cycle cost. Background technique [0002] In recent years, because the power cable system meets the needs of resource conservation and environmental friendliness, the power cable transmission system has been vigorously developed. In order to achieve greater transmission capacity and longer transmission distance, people continue to increase the voltage level of cable lines, and at the same time, in order to enhance the safety and stability of the cable system, reduce the cost of cable production, installation and operation and maintenance, the technology of cables and their brackets keep improving. At present, in the cable tunnel, the cable line uses more supports made of steel materials, which are divided into several types such as ang...

AI Technical Summary

Problems solved by technology

But in fact, the eddy current loss of the steel bracket increases the operating cost of the cable line. The heating problem of the bracket caused by the eddy current loss and the air humidity in the cable tunnel will cause the corrosion of the steel to accelerate, and the increased operation and maintenance costs cannot be ignored.

In addition, for different types of steel brackets, their mechanical properties are an important constraint condition. Therefore, the bracket structure and consumables used in the design stage are related to this condition, which will directly affect the manufacturing cost of the bracket. Thus changing the initial investment cost of cable line steel support

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