The Icing Conductor Galloping Mechanism Analysis And Anti-dancing Countermeasures

Ice cover in certain wire with often occur dance, it is a kind of low frequency, the large amplitude of self-excited vibration. The amplitude of the dancing is usually quite large, to the safe operation of the transmission line of great threat. As the electric power construction of large-scale development, further study of dancing is a very urgent task. But because of the complexity of the characteristics of transmission line dancing, people to dance mechanism not fully understood, must for transmission lines further research and study. This article from the response of the dancing in the simulation and the technical aspects of dance dance was studied, and the main research contents have papers:Deduced the average wind load of wires cladding ice static configuration and dynamic calculation formula. Relative to the dead weight of the ice cover under the action of the wire static configuration and dynamic characteristics, this paper presents an average of under the-action of the static configuration and dynamic characteristics, For ice cover of wires of pneumatic stability analysis provides a more accurate analysis of initial conditions. Average wind load wire cladding ice vibration characteristics formula can more fully reflect the vibration characteristics of the wire with elastic geometric parameters and change rules and wire modal of mutual relations.The wire is considered reverse, the freedom of the three-node cable unit mass matrix and stiffness matrix unit, through the ANSYS theoretical analysis the cladding ice dancing wires. The three-dimensional space beam element simulation of power lines, to set up their own unique and practical 3 d finite element model, solve the consideration of horizontal, vertical and reverse three degrees of freedom cladding ice on the basis of dynamic analysis of wire. The finite element analysis method of the research of hy transmission line dance mechanism and the whole process of dancing, through literature than with relative to verify the accuracy of the calculation results of this program. Based on this by adjusting the parameters, and find out the wind speed, Angle of attack, tension, across long to the influence of the factors such as dancing and existing dancing to verify and analysis of the mechanism.The heavy pressure the dance and the detuning in single wire and split on the effect of wire dance. The heavy pressure in the dance single wires effect is good, in a divided wires effect is poorer; Detuning in single wires is very effective, and in a split has little effect on the wires.