500kV四分裂导线间隔棒布置及其优化研究

发布时间：2018-04-14 13:29

本文选题：分裂导线 + 次档距振荡　；参考：《华北电力大学》2017年硕士论文

【摘要】：间隔棒作为一种保持分裂导线之间距离的防护金具,其在档距上的安装位置不仅关系到分裂档能否满足线路运行时的电气、机械条件,而且也会影响其对次档距振动的抑制作用。本文结合试验与理论计算,建立间隔棒优化配置模型,优化次档距布置,使各个间隔棒的布置在满足相关条件的前提下,能够最大程度的抑制次档距振动。首先进行分裂导线次档距激振试验:无量纲特性试验和衰减率试验。利用无量纲特性试验,建立次档距比例系数,该系数反映出了次档距内导线振动节点位置与其相邻次档距长度之间的关系;利用衰减率试验,得出次档距内导线的振幅对数衰减率与次档距比例系数有关,并结合Hearnshaw试验数据得出衰减率在一定范围内随着次档距比例系数的增大而减小。之后求取间隔棒布置时的约束条件:根据防鞭击、防吸附等条件确定最大次档距;依据衰减率条件和扭转稳定条件确定端次档距;结合衰减率条件与失谐比条件确定中间次档距;依据整档防对称条件设置两个端次档距的长度差等。最后以次档距比例系数在一定范围内最小为目标函数,以次档距长度为设计变量,结合之前求取的约束条件建立优化模型。对某条实际档距进行间隔棒优化布置计算,并与现有间隔棒布置方法进行对比,得出优化后的次档距在满足各个线路运行条件的前提下,相较原有布置方式,得出优化后的间隔棒布置方式对次档距振动的抑制作用更强。
[Abstract]:The spacer rod is used as a protective tool to keep the distance between the split wires. The installation position of the spacer not only relates to the electrical and mechanical conditions of the split shaft, but also to the electrical and mechanical conditions of the line.And it will also affect its effect on the vibration suppression of the secondary distance.Combined with experiment and theoretical calculation, the optimal allocation model of spacer rod is established, and the arrangement of secondary spacing is optimized, so that the arrangement of each spacer can restrain the vibration of subspace as much as possible on the premise of satisfying the relevant conditions.At first, the vibration test of split conductor is carried out: dimensionless characteristic test and attenuation rate test.By using dimensionless characteristic test, the proportional coefficient of secondary distance is established, which reflects the relationship between the position of the vibration node of traverse in the secondary distance and the length of its adjacent secondary distance.It is concluded that the amplitude logarithmic attenuation rate is related to the ratio coefficient of the secondary spacing of traverse, and the attenuation rate decreases with the increase of the ratio coefficient of the secondary distance in a certain range combined with the Hearnshaw test data.After that, the constraint conditions of the spacer rod arrangement are obtained: the maximum spacing is determined according to the conditions of anti-whipping and anti-adsorption, and the terminal spacing is determined according to the condition of attenuation rate and torsional stability.According to the condition of attenuation rate and detuning ratio, the middle distance is determined, and the length difference between the two ends is set according to the anti-symmetry condition of the whole file.Finally, the optimal model is established by taking the minimum of the ratio coefficient of the secondary distance in a certain range as the objective function and the length of the secondary distance as the design variable.The optimum layout of spacer bar is calculated for a real spacer, and compared with the existing spacer arrangement method, the optimized secondary spacing is compared with the original layout under the premise of satisfying the operating conditions of each line.It is concluded that the optimized spacer layout has a stronger effect on the vibration suppression of the secondary spacing.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM75

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