Research On The Configuration Method Of Damper Of Large-sectional Conductors Under The Aeolian Vibration

Under the action of wind load, large-sectional conductors are prone to the phenomenon of aeolian vibration. The aeolian vibration is one of the main factors that endanger the reliability of the circuit. Due to the increase of the cross-sectional area of the wire, the design code for the damper, which is the mainstream now, is not applicable to anti-vibration of large-sectional conductors in the process of anti-vibration analysis of large-sectional conductors. In this paper, the wind vibration of large section conductor is analyzed on the basis of the energy balance method. And combined with engineering example, the configuration method of damper used in aeolian vibration of large-sectional conductors is studied. The main content of this article is as follows:Firstly, based on the energy balance method, the wind vibration of the transmission line is studied and analyzed, and the calculation formula of the wind energy input power and the power of the wind power is obtained. And Combined with engineering example,we obtain that 1000mm2 large-sectional conductors are more prone to the fatigue damage of aeolian vibration. Based on this, we obtain that the range of wind speeds and the range of the frequency that need to be protected from the aeolian vibration have been expanded compared to mainstream conductor. Dissect the phenomenon of aeolian vibration of transmission line with dynamic method, and the vibration modes of large-sectional conductors are analyzed in detail in two cases :without rigid or damping and with rigid and damping. We obtain the conclusion that the vibration of large-sectional conductors significantly reduced when considering the stiffness of conductor.Secondly, we apply dynamics to dissect the energy-dissipation mechanism of damper, and energy-dissipation equation of damper is derived in the form of wave function expanding. Based on the theory, the installation location quantity calculating formula of damper are derived. Based on the energy balance method and combined with engineering example, the number of damper are determined when span lengths are different. The following conclusions are obtained:1) Dynamic bending strain increases with the increase of span lengths,when large-sectional conductors are in aeolian vibration.2) When the dynamic bending strain value is 150??, install one damper at each end of each span can achieve the vibration-proof effects when span lengths, L, is less than m560,and the number of damper is two when ?(27) Lm950m560.Thirdly, Software for large-sectional conductors to calculate configuration of damper to prevent aeolian vibration. And combined with engineering example, it is proved that the software can realize the calculation of the vibration of the wind vibration of large cross section conductor, and the software has the advantages of short calculationtime with a small amount of work.