| Galloping of iced conductor can cause cascading of the transmission line and disruption in the electrical power supply. Therefore, the study on the galloping of iced conductor behaves great significance in power supply engineering. In this thesis, the main factors on galloping of iced conductor, the mechanism of galloping of iced conductor, and the excitation mode of galloping are introduced briefly. Then, the general expression of T.L nonlinear cable element is established by using virtual work principle. According to the properties of galloping of the iced cable, a 3-node cable element having rotational degree of freedom is derived. Based on the characteristics of iced conductor, the general method for establishing galloping finite element model is provided. Concurrently, the thesis discusses the method to overcome the difficulty brought by geometric nonlinear and the free oscillation analysis and galloping analysis of an actual power transmission line are performed by using the mode superposition method. In the end, supported by the study of the control mechanism of air flow spoiler, the calculated model of iced conductor loaded air flow spoiler is provided. Using this model, it is simulated in the applications called Fluent. The results match well with the experimental findings. |
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