Study On Mechanical Characteristics Of Conductor Near Damper Clamp Of Transmission Line

China’s vast geographical and economic development determines the uneven distribution of energy and power load,which makes long-distance power transmission an inevitable choice.In order to ensure the safe operation of power grid,we should pay attention to the reliability of transmission lines.While the transmission line in operation will often occur conductor damage,most of this situation occurs in the joint of conductor and fittings,due to the local stress of aluminum strand is too large.In the field of practical engineering,the wire damage and broken strand often occur at the outlet of the damper clamp.At the same time,the research on the stress characteristics of the wire at the outlet of the damper clamp is relatively less.Therefore,it is more important to study the stress characteristics of the wire at the outlet of the damper clamp.Under this background,this paper studies the mechanical characteristics of the conductor near the damper clamp.Firstly,based on the theoretical research,the wire model and the wire damper model are constructed.Secondly,based on the model,through the finite element simulation,the influence of wire stress,tension,amplitude and frequency on the wire stress distribution near the damper clamp is studied.Finally,based on the wire stress test platform of the project team,the wire stress test near the damper clamp is carried out,and the wire stress data near the damper clamp is obtained.According to the simulation and test data,the mechanical characteristics of the wire near the damper clamp are summarized.The main achievements are as follows:(1)The model of conductor and conductor vibration damper is established.The axial tension load and the wind vibration load are applied to the conductor model.The rationality of the model load is verified by comparing with the relevant research conclusions.The model of conductor vibration damper is loaded by the verified loading method,and the preliminary results are obtained.(2)Taking a type of ACSR as the research object,the stress distribution of conductor near damper clamp and the influence of conductor tension,amplitude and frequency on the stress distribution of conductor near damper clamp are studied by numerical simulation.The finite element simulation results show that:compared with the conventional position of the conductor,the wire near the damper clamp has a larger stress distribution,and the maximum stress of the wire strand appears at the position of 0 mm away from the clamp outlet;the stress of the wire strand near the damper clamp increases with the increase of the tension;the stress of the wire strand near the damper clamp increases with the increase of the vibration amplitude of the conductor;the effect of frequency on the vibration of the damper clamp is analyzed The wire stress near the clamp of vibrating hammer has little effect.(3)Through the test method,on the basis of the wire strand stress test platform of the research group,the stress values of the wire near the damper clamp under different tension,amplitude and frequency were measured,and the results were compared with the finite element simulation data.The mechanical characteristics of the conductor near the damper clamp are summarized,and the relevant data are provided to lay the foundation for the follow-up research.