平行架设的特高压交流输电线路电磁环境特性研究Study on Electromagnetic Environment Characteristics of Parallel UHV AC Transmission Lines
万保权,史兴华,冯华,方玉群,秦威南,何旺龄
WAN Baoquan,SHI Xinghua,FENG Hua,FANG Yuqun,QIN Weinan,HE Wangling
摘要(Abstract):
在输电走廊紧缺的地区,特高压线路架设时难免会与其他特高压或超高压线路平行架设,走廊附近区域电磁环境较为复杂,需要深入研究。通过建立三种不同形式平行架设交流输电线路模型,对平行架设区域工频电磁场、无线电干扰和可听噪声特性进行研究。结果表明,线路间距减小会使强电磁环境区域减小,但幅值会有一定提高;平行架设线路高度对工频电磁场分布的影响大于无线电干扰和可听噪声。总体来说,特高压输电线路平行架设产生的电磁环境与导线高度和平行线路间距相关,在无线电干扰和可听噪声限值达标的情况下,可适当减少平行架设线路的间距。研究成果对线路走廊紧张地区的特高压线路设计和建设具有一定的参考意义。
In regions where transmission corridors are badly needed, UHV lines will inevitably be constructed in parallel with other UHV or EHV lines. Hence, the electromagnetic environment characteristics near the corridors are complex and in-depth study should be carried out. In this paper, three models of parallel AC transmission lines are established, and the characteristics of the power frequency electromagnetic field, radio interference and audible noise near the parallel lines are studied. The results show that as the line spacing decreases, the area of strong electromagnetic environment reduces, but the amplitude will increase. The height of the parallel-erected line has more influence on the distribution of the power frequency electromagnetic field than the radio interference and audible noise. Generally, the electromagnetic environment generated by the parallel erection of UHV transmission lines is related to the conductor height and the spacing of parallel lines.When the radio interference and audible noise limits are up to standard, the spacing of parallel erection lines can be appropriately reduced. This study has a certain reference significance for the design and construction of UHV lines in areas being short of corridors.
关键词(KeyWords):
特高压交流输电线路;平行架设;电磁环境;线路间距;对地高度
UHV AC transmission lines;parallel erection;electromagnetic environment;line spacing;ground height
基金项目(Foundation): 电网环境保护国家重点实验室开放基金项目(GYW51202001553)
作者(Author):
万保权,史兴华,冯华,方玉群,秦威南,何旺龄
WAN Baoquan,SHI Xinghua,FENG Hua,FANG Yuqun,QIN Weinan,HE Wangling
DOI: 10.19585/j.jzdl.202201014
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- 特高压交流输电线路
- 平行架设
- 电磁环境
- 线路间距
- 对地高度
UHV AC transmission lines - parallel erection
- electromagnetic environment
- line spacing
- ground height