Abstract
The maximum vertical jump height, horizontal swing of conductor line and unbalanced tension of suspension insulator string, known as the dynamic response parameters, of transmission lines after ice-shedding are key parameters determining the electric insulation clearance and strength of the tower-line system in the ice zone. Numerical studies on the dynamic responses of lines with various structural, ice and wind parameters are carried out, and from the dynamic responses the maximum jump height, horizontal swing and unbalanced tension are extracted to create a dataset. Based on the dataset and the back-propagation neural network and the extra-trees algorithm, two prediction models for the three parameters, i.e. the jump height, horizontal swing and unbalanced tension, are constructed. With eight input variables, the three dynamic response parameters can be predicted quickly and effectively by the two models. These prediction models are suitable for transmission lines with a wide range of structural parameters such as long span and large elevation difference, and provide an efficient means for electric insulation clearance and strength design of transmission lines in ice zone.
Published Version
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