交流输电线路可听噪声计算分析(Ⅱ)—交叉跨越架设  

Calculation and Research of Audible Noise of AC Transmission Lines(Ⅱ)·Distribution Under Crossing Erection

作　　者：付万璋 何旺龄 谢龚浩 梁倩旖 蓝磊[1] 陈豫朝 FU Wanzhang;HE Wangling;XIE Gonghao;LIANG Qianyi;LAN Lei;CHEN Yuchao(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;Wuhan NARI Limited Company of State Grid Electric Power Research Institute,Wuhan 430074,China;State Grid Corporation of China,Beijing 100031,China)

机构地区：[1]武汉大学电气与自动化学院,武汉430072 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [3]国家电网有限公司,北京100031

出　　处：《高电压技术》2019年第12期4070-4078,共9页High Voltage Engineering

基　　金：湖北省自然科学基金(2018CFB257);中国博士后基金(2018M632916)~~

摘　　要：输电线路交叉跨越架设时,其可听噪声分布特性是线路设计时的关键因素。因此,采用中国电科院提出的声功率级预测公式,搭建了考虑弧垂影响的输电线路交叉跨越可听噪声计算模型,该模型考虑了2线路之间表面场强的耦合作用。首先采用此模型计算了实际某条特高压1000 kV线路跨越超高压500 kV线路时,好天气情况下交叉跨越区域内可听噪声分布特性,并对比分析了3条典型路径上可听噪声分布与实际测量结果的误差,结果表明,3条路径上的平均相对误差为3.09%,验证了所提计算模型的准确性。而后研究了1000 kV单回线路与500 kV双回线路交叉跨越架设时,交叉角度、500 kV导线相序排列以及2线路间空气间隙距离对于交叉跨越区域可听噪声分布的影响。研究结果表明:当交叉角度在0°~90°间变化时,随着交叉角度的增大,边相外20 m处可听噪声逐渐降低,可听噪声幅值呈现一个先增大后缓慢减小的趋势;交叉角度为45°时,可听噪声幅值最大;500 kV双回线路采用顺相序排列(ABC-ABC)可以优化交叉跨越区域可听噪声分布;随着空气间隙距离的增大,1000 kV线路可听噪声水平整体增大。When transmission lines are erected in a crossing way,the audible noise distribution characteristics are the key factors in the design of the lines.We adopted the sound power level prediction formula proposed by China Electric Power Research Institute to build an audible noise calculation model under crossing erection in which the effect of sagging is taken into consideration;meanwhile the coupling of surface electric field strength between two lines is also taken into consideration in the model.Firstly,this model was used to calculate the audible noise distribution characteristics of an actual ultra-high-voltage 1000 kV line crossing an extra-high-voltage 500 kV line in a crossing area under good weather conditions.The audible noise distribution and actual measurement results on three typical paths were compared and analyzed.The results show that the average relative error on the three paths is 3.09%,which verifies the accuracy of the calculation model in this paper.Furthermore,the effects of the crossing angle,500 kV phase sequence arrangement,and the air gap distance between two lines on the audible noise distribution in the crossing area were investigated when a single-circuit line of 1000 kV and a double-circuit line of 500 kV were crossed.The results show that when the cross angle changes from 0°to 90°,the audible noise at the 20 m away from the edge gradually decreases as the crossover angle increases,and the audible noise amplitude increases first and then decreases slowly.The trend is that when the crossing angle is 45°,the amplitude of the audible noise is the largest;the ABC-ABC on the 500 kV double-circuit line is adopted to optimize the audible noise distribution in the crossing area;with the increase of the air gap distance,the audible noise level of the 1000 kV line increases as a whole.

关 键 词：交叉跨越 交流输电线路 可听噪声 交叉角度 相序排列 

分 类 号：TM7[电气工程—电力系统及自动化]