Calculation Model Of Icing On Transmission Line

Power industry is the foundation of ensuring rapid and healthy national economy development .With the development of economic, every aspect of production and life depends on the power more and more strongly, especially in recent years, the state grid is planning and constructing 1000KV alternating current and±800 KV direct current in order to expedite power development and ensure the base of stability and sustainable development of economic However, ice damage on transmission lines has been an important problem which has obsessed lines many years. China is a nation with vast area, complicated topography and variable climate, but line icing is very serious. According to the icing record, line icing causes varying accident ,ranging from ice flashover , damage to ground wire , fitting and parts to power outages , tower broken down and resulting economic loss . All of this is a threat to the development of power industry and normal life. In order to ensure the special high-voltage power grid running safely and reliably, power grid request operation of transmission lines against snow, ice hazard a higher demand, it is essential to study transmission line icing .In this paper, the mathematical model of wire icing is studied, according to wire hanging point force under wind and no-wind, combined with the maximum sag and other related angle calculated, the model of ice cross-sectional area is established. Main tasks are as follows:(1) Analysis icing mechanism , causes, and forming condition . Summarize the icing factors, icing species and distribution characteristics and the disaster caused by icing.(2) List the ice model at home and abroad, contrast and analyze the advantages and disadvantages of each model.(3) Create new model .Analyze the suspension point force under the wind and no wind , combining related calculations of line maximum sag, suspension point angle , finally draw a conclusion that total wire cross-sectional area can be calculated, and ice thickness can be also calculated .And the model is verified in theory.(4)Introduce domestic and international de-icing research in recent years, including the operation in planning and design phase and the measure in running phase(5) Summary and outlook.