Research on Form-finding of Icing and Ice-shedding Transmission Line Considering the Influence of Multi-span and Insulator String

摘要

Traditional research on form-finding of transmission line is aimed at the single-span line,but little for the multi-span.For this reason,this paper took a strain section for example,a finite element model of multi-span transmission line was established in ANSYS,fullly considering the interplay between each span transmission line and insulator strings.Combined with the actual line,the initial configuration under the weight load was presented,and the shape change of conductor was simulated,under uniform ice-coating of every span and ice-shedding of different spans.The study finds that conductor sag increases significantly and insulator string offsets seriously under the condition of ice-shedding of different spans.And the inevitability of discharge tripping accident gets a reasonable explanation.The integral model method proposed in this paper can be used for numerical simulation of overhead conductors with icing and ice-shedding,to proactively identify the tripping transmission lines attributed to ice-shedding,timely reponsing,and preventing trouble before it happens.