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输电线路档距组合对覆冰导线脱冰跳跃的影响

DOI: 10.13336/j.1003-6520.hve.2015.07.033, PP. 2356-2361

Keywords: 覆冰,脱冰,有限元,档距组合,不平衡张力,冰跳幅值

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Abstract:

为明确输电线路塔线体系脱冰跳跃张力和幅值特性,揭示各项参数对脱冰不平衡张力和冰跳幅值的影响规律,利用ANSYS建立导线-绝缘子耦合有限元模型,针对档距组合下脱冰档位置和档距的变化,通过控制变量法,得到了档距组合对于塔线体系动态位移和不平衡张力的变化规律。结果表明随着脱冰档档距的不断增加,其导线悬挂点处的纵向不平衡张力近似呈线性增加;随着非脱冰档档距的增加,中间档脱冰时,其导线悬挂点处的最大不平衡张力增幅不大;不论脱冰档还是非脱冰档变化,当档距较小时,其导线脱冰跳跃高度随档距的增加而增加,当档距增加到一定程度,其导线脱冰跳跃高度的变化趋于饱和。因此,线路档距组合对覆冰导线脱冰跳跃的影响显著。

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