特高压大直径输电线路稳定线形的研究

Study on stable shape for large cross-section UHV Lines

针对现有输电线路设计中应用的架空线形公式与实际运行中特高压线路差别较大的不足,通过架空线的稳定性分析,充分考虑到伸长和弯曲刚度对架空线的线形和应力的影响,基于最小势能原理建立了以架空线的线形为基础的架空线总势能的泛函,通过泛函分析把求解稳定线形问题转化成了求解泛函极值问题,并利用模拟退火算法给出了考虑伸长和刚度的架空线线形的解析解.最后结合工程实例量化分析了架空线的伸长和刚度对线形和自身受力的影响,为输电线路安全设计及施工提供理论参考.

The design for existing transmission lines overhead application of linhear equation with the actual operation of the large difference between the UHV line deficiencies, through the stability analysis of overhead lines, fully taking into account the impact of elongation and bending rigidity to linear and stress of the overhead line, has established total potential energy functional which takes the overhead line＇ s linear as foundation overhead lines by the minimum potential energy principle, through the functional analysis to solve the stability problem is converted into linear functional in order to solve the extreme problems and the use of simulated annealing algorithm is given consider the elongation and stiffness of the overhead line linear analytical solution. Finally the union project example quantification has analyzed the overhead line＇ s elongation and the rigidity to linear and own stress influence, provides the theory reference for the transmission line safe design and the construction.