姚〓艺1,付万璋2,何旺龄2,蓝〓磊2,万保权3,文习山2.多回超/特高压交流输电线路交叉跨越情况下无线电干扰特性研究[J].水电能源科学,2018,36(6):201-204
多回超/特高压交流输电线路交叉跨越情况下无线电干扰特性研究
Study of Radio Interference Characteristics of Multi turn EHV/UHV AC Transmission Lines in Crossing Erection
  
DOI:
中文关键词:  特高压交流线路  交叉跨越  激发函数法  无线电干扰  对地高度  交叉角度
英文关键词:UHV AC lines  crossing erection  excitation function method  radio interference  height of lines  crossing angle
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作者单位
姚〓艺1,付万璋2,何旺龄2,蓝〓磊2,万保权3,文习山2 1. 中国能源建设集团 安徽省电力设计院有限公司 安徽 合肥 230601 2. 武汉大学 电气工程学院 湖北 武汉 430074 3. 电网环境保护国家重点实验室(中国电力科学研究院)湖北 武汉 430074 
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中文摘要:
      鉴于我国特高压交流线路跨越超高压交流线路架设的情况越来越普遍,电晕放电引起的无线电干扰问题已成为线路导线选型和杆塔结构优化设计的重要考虑因素之一,建立了输电线路无线电干扰特性仿真计算模型,利用模态传播原理获取电晕放电电流在导线上的分布特性,获得了不同路径上的无线电干扰分布情况,通过测量河南省南阳市境内实际运行中的一条1 000 kV特高压交流输电线路跨越500 kV超高压交流输电线路的无线电干扰特性验证了所建模型的有效性,进而建模分析了线路不同对地高度、交叉角度等对无线电干扰特性的影响规律。结果表明,增加线路对地距离可有效减少场强幅值,但衰减速度会减慢;增大交叉角度可减小场强幅值,增大衰减速度,使边相外20 m场强值有所增加。
英文摘要:
      As for the radio interference caused by corona discharge, it has become one of the important factors for the selection of line conductors and the optimization design of tower structure. With the continuous development of high voltage AC transmission projects, crossing erection of different voltage level transmission lines is becoming more and more common. This paper establishes a simulation model for the radio interference characteristics of transmission lines. The modal propagation principle is adopted to obtain distribution characteristics of corona discharge current on the wire and radio interference distribution on different paths. The accuracy of the model was verified by measuring the radio interference characteristics of a 1 000 kV UHV AC transmission line in Nanyang City, Henan Province, which actually strove across a 500 kV UHV AC transmission line. The height of the line and the cross angle were discussed to get radio interference characteristics. The results show that increasing the line to ground distance can reduce the field strength amplitude effectively, but the decay rate will slow down; increasing the cross angle can reduce the field strength amplitude and increase the decay speed, and the field strength at 20 m outside the edge will increase.
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