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Keywords

transmission pole, fluidsolid coupling, wind load, dynamic timehistory analysis, monitoring system

Abstract

Power transmission lines in the coastal areas of South China are often threatened by typhoons. This paper aims to study windresistance and windmonitoring technologies for typical cement poleline structures in 10kV distribution lines. Firstly, a windresistant monitoring system for poleline structures is established. Then, a method is proposed to determine the threshold in the monitoring system. A finite element model for a whole rodline is established. By using the fluidstructure coupling model to calculate the windrod system, the value of wind speed is transformed into the wind load which is generally used as the threshold of wind speed in early warning stage. Finally, the windresistant monitoring technology of polelines is verified by the monitoring results in practical operation. It is shown that the wind load at the surface of conductors is inhomogeneous. The wind load can be accurately calculated through the fluidsolid coupling model of the windpole system. And The structural response obtained by the model accurately reflects the actual stress state of the structure, which can be used to determine the threshold of wind speed in the early warning stage. The windresistant monitoring system of poleslines proposed in this paper has been verified by practical projects.

DOI

10.19781/j.issn.16739140.2020.01.025

First Page

181

Last Page

186

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