考虑环境因素时雨滴对直流输电导线电晕振动的影响

发布时间：2018-05-12 14:38

本文选题：电晕振动 + 相对空气湿度　；参考：《中国电机工程学报》2016年23期

【摘要】：为了研究环境因素对输电线路电晕振动的影响,该文在分析输电导线电晕振动的基础上,基于有限元法建立了输电线路电晕振动模型,结合Newmark直接积分法求解偏微分方程,得到了电场强度变化时导线的振动位移,计算数据和实验数据相吻合。然后求取了考虑环境因素(相对空气湿度、相对空气密度、导体表面等效粗糙程度、雨水电导率等)时导线的振幅。结果表明:导线振动幅值随相对空气湿度的增大而增大,相对空气湿度为0.8时,导线最大振幅比相对空气湿度为0.2时增大了约7%;随相对空气密度的增大而减小,相对空气密度为0.6时,导线最大振幅比相对空气密度为1.08时增加了约14%;随导体表面等效粗糙程度的减小线性增大;和雨水电导率没有明显关系。
[Abstract]:In order to study the influence of environmental factors on the corona vibration of transmission lines, the corona vibration model of transmission lines is established based on finite element method, and the partial differential equation is solved by Newmark direct integration method. The vibration displacements of conductors with the change of electric field intensity are obtained, and the calculated data are in agreement with the experimental data. Then the amplitude of conductors considering environmental factors (relative air humidity, relative air density, equivalent roughness of conductor surface, Rain Water conductivity, etc.) is obtained. The results show that the vibration amplitude of conductors increases with the increase of relative air humidity. When the relative air humidity is 0.8, the maximum amplitude of conductors increases by about 7 times compared with relative air humidity of 0.2, and decreases with the increase of relative air density. When the relative air density is 0.6, the maximum amplitude of the conductor increases by about 14% compared with the relative air density of 1.08, and increases linearly with the decrease of the equivalent roughness of the conductor surface, which has no obvious relationship with the conductivity of Rain Water.
【作者单位】：上海电力学院电气工程学院;
【基金】：上海绿色能源并网工程技术研究中心(13DZ2251900)~~
【分类号】：TM75

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