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电网技术 2008, 32(2) 9-12 DOI:
ISSN: 1000-3673 CN: 11-2410/TM |
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| 论文 |
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特高压输电线路对调幅广播台站的无源干扰 |
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干喆渊1，张小武1，张广洲1，万保权1，邬 雄1，周文俊2 |
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1．国网武汉高压研究院，湖北省 武汉市 430074；2．武汉大学 电气工程学院，湖北省 武汉市 430072 |
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摘要：
特高压输电线路对调幅广播台站的无源干扰主要是由垂直杆塔引起的。文章通过实体建模，用矩量法计算了不同防护间距下与杆塔垂直的平面上特高压输电线路对调幅广播台站的无源干扰水平，以及无源干扰随广播台站工作频率的变化关系。计算结果表明，无源干扰随着防护间距的增大而衰减，在某一防护间距下，无源干扰随着频率的增大而衰减，并且无源干扰较大值都出现在低频段(5MHz以内)。因此如果从无源干扰的角度考虑，可以按照500 kV线路的要求来确定特高压输电线路对调幅广播台的防护间距，并留出适当的裕度。
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关键词：
特高压输电线路
调幅广播
无源干扰
防护间距
矩量法
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Passive Interference in Receiving Stations of AM Broadcasting Caused by UHVAC Transmission Lines |
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GAN Zhe-yuan1，ZHANG Xiao-wu1，ZHANG Guang-zhou1，WAN Bao-quan1，WU Xiong1，ZHOU Wen-jun2 |
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1．Wuhan High Voltage Research Institute of SGCC，Wuhan 430074，Hubei Province，China； 2．School of Electrical Engineering，Wuhan University，Wuhan 430072，Hubei Province，China |
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Abstract:
The passive interference in receiving station of amplitude modulation (AM) broadcasting from UHVAC transmission lines is mainly caused by towers. By means of real-size modeling, the passive interference levels of AM broadcasting in the plane perpendicular to the tower caused by UHVAC transmission line under different prevention spacing as well as the variation of passive interference with working frequency of receiving station are calculated by the method of moment Calculation results show that passive interference attenuates with the increase of prevention spacing; under a certain prevention spacing, passive interference attenuates with the increasing of frequency, and higher values of passive interferences appear in the low frequency band lower than 5MHz. Therefore, from the standpoint of passive interference, the prevention spacing between AM broadcasting receiving station and UHVAC transmission line can be determined according to the requirement for 500kV transmission line while an appropriate margin has to be reserved. |
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Keywords:
UHV transmission line
AM broadcasting
passive interference
prevention spacing
method of moment
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收稿日期 1900-01-01 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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