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| Characteristics of Icing Conductor Galloping and Induced Dynamic Tensile Force of the Conductor |
| Wang Shaohua, Jiang Xingliang, Sun Caixin |
| State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400030 China |
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Abstract The three degree-of-freedom (DOF) model of conductor galloping is established, and the aerodynamic parameters of the icing conductor are simulated with Fluent software. Then the galloping is simulated with the Simulink model, and the basic characteristics of galloping are obtained. Based on the length variation as a result of galloping, the varying tensile force of conductors is calculated, and the influences of galloping amplitude, number of loops, span and sag on varying tensile force are analyzed. The results show that, when the galloping occurs, the vertical and horizontal displacements are nearly simple harmonic waves, and the galloping track is nearly oblique ellipse. Both the horizontal tension and the vertical component of the axial tension at the suspension point increase with the increase of the galloping amplitude, the decrease of span, and the increase of the sag. The one-loop galloping can lead to the most extensive variation range. The parity of the number of loops has great influence on the relative variation ratio.
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Received: 16 August 2008
Published: 04 March 2014
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2010, Vol. 25 
