Study On Wind-ice Load Effect And Disaster Control In Mountion Overhead Transmission Lines

The rapid development of power,cross-regional transmission of the project is more and more,so the mountain large gap transmission line engineering is more and more.As the mountain transmission towers are often in sparsely populated areas with traffic inconvenience.Once the transmission line is damaged,the time and cost of repair are higher,and because of the complexity of the large height difference transmission tower,especially in the larger icing and larger wind speed,the corner transmission tower is prone to damage And even destroyed,to find a harsh environment can effectively protect the transmission tower is not destroyed the way it is very important.This paper is based on such a demand,the detailed formulation and evaluation of several measures to protect the tower.In the transmission line in the ground,compared to the tower body and the value of the wire is small,so in the icing occurred when the active part of the ground to remove the loss can be minimized,and repair costs are greatly reduced,Thus ensuring the subsequent power supply.In this paper,a 3-tower 4-line model of ABAQUS is established based on a large elevation shaft in a central China.According to the true size of the transmission line,the real load conditions were simulated.In order to make the structure itself more authenticity,the model studied in this paper has been measured in real time,through the measured data and indoor software to compare the data,and constantly fine model,so that the large model consistent with the real structure.Under the fine model,the different icing thicknesses of light ice,middle ice and heavy ice are set,and the impact of the different cable model on the transmission tower is studied.The effects of different Response,to assess the impact of different transmission lines on the transmission tower effect.In order to simulate the effect of the combination of ice and ice load on the transmission line in the real environment,the effect of the wind-ice coupling effect is studied by comparing the response of different missing line models to evaluate the effect of the demolition model.Finally,this paper deepens the research,the wind and ice load coupling under the transmission line vibration analysis,the use of TMD shock absorber.The shock absorption analysis under the pulsating wind and the total wind condition is studied respectively.By comparing the shock absorbing effect,it is found that the acceleration and speed of the transmission tower system are obviously improved.At last,what has been researched in this paper is given,with the results summary and conclusions is also showed.The insufficient of this paper and the outlook of the research are also pointed out.