【摘要】 为研究输电线路导线直流融冰非对称运行特性，以LGJ-400/50输电导线为研究对象，建立不同运行条件下的输电导线实体模型，采用COMSOL软件探究不同覆冰厚度对导线温度分布的影响，并对不同环境温度和不同风速对导线中心点温度变化进行分析，得到脱冰时刻导线温度作为初始条件施加，应用ANSYS LS-DYNA PrepPost非线性结构动力学模型，建立实际运行过程三相导线-相间间隔体系有限元模型，分析导线体系直流融冰非对称脱冰动力响应。结果表明，在采用不同融冰方案工况下，不同脱冰相数下导线体系最大脱冰跳跃高度不同，三相导线-相间间隔导线体系在融冰过程中相比单导线脱冰情况具有非对称性，依据间隔棒布置条件对导线体系脱冰动力响应影响规律，能够优化导线相间距进而保证直流融冰过程安全运行。更多还原

【Abstract】 Here, to study asymmetric operation characteristics of DC ice-melting on transmission line conductor, LGJ-400/50 transmission conductor was taken as the study object to establish physical models of transmission conductor under different operating conditions. The software COMSOL was used to explore effects of different ice coating thicknesses on conductor temperature distribution, temperature changes at center point of conductor under different environmental temperatures and wind speeds were analyzed to obtain conductor temperature at de-icing moment as the initial condition to impose.The software ANSYS LS-DYNA PrepPost nonlinear structural dynamic model was used to establish a finite element model of 3-phase conductor interphase interval system during actual operation, and analyze its DC ice-melting asymmetric deicing dynamic response. The results showed that under different working conditions of different ice-melting schemes, maximum deicing jump heights of conductor system are different under different deicing phases; 3-phase conductor interphase interval conductor system in ice-melting process has asymmetry compared to a single conductor deicing situation; based on effects of spacer arrangement conditions on deicing dynamic response of conductor system, the conductor inter-phase distance can be optimized to ensure safe operation of DC ice-melting process.更多还原