Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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高海拔地区特高压直流输电线路电磁环境研究

来源:电工电气发布时间:2021-01-23 16:23 浏览次数:728

高海拔地区特高压直流输电线路电磁环境研究

袁飞1,吴志明1,贾国富2
(1 中国能源建设集团江苏省电力设计院有限公司,江苏 南京 211100;
2 国网青海省电力公司黄化供电公司,青海 黄南藏族自治州 811200)
 
摘 要:为了研究高海拔地区特高压直流输电线路电磁环境影响,青海—河南±800kV特高压直流输电工程的工程组基于西藏高海拔试验线段的数据,对合成场强、无线电干扰、可听噪声等进行分析。对工程试验进行了阐述,并给出了工程技术边界的确定。实验结果表明,高海拔地区对电磁环境产生不利影响,在工程应用上,需要进行相应的海拔修正,对于合成场强控制的对地距离,每升高1000m海拔对地距离增加6%;对于无线电干扰,以1000m为基准,海拔高度每增加300m,无线电干扰限值增加1dB;对于可听噪声,海拔每增加1000m,可听噪声增加2.2 dB 进行修正。
    关键词:高海拔;特高压直流;电磁环境;合成场强;无线电干扰;可听噪声
    中图分类号:TM752     文献标识码:A     文章编号:1007-3175(2021)01-0017-07
 
Electromagnetic Environment of UHVDC Transmission
Lines in High Altitude Areas
 
YUAN Fei1, WU Zhi-ming1, JIA Guo-fu2
(1 China Energy Engineering Group Jiangsu Electric Power Design Institute Co., Ltd, Nanjing 2111 00, China;
2 State Grid Qinghai Electric Power Company Huanghua Power Supply Company,
Tibetan Autonomous Prefecture of Huangnan 811 200, China)
 
    Abstract: In order to study the electromagnetic environment impact of UHVDC transmission lines in high altitude areas, the Qinghai—Henan ±800 kV UHVDC transmission engineering group based on the data of high altitude test lines in Tibet analyzed the synthetic field intensity,radio interference, audible noise, etc.The engineering test is explained, and the determination of the engineering technology boundaryis given. The experimental results show that high altitude has a negative impact on the electromagnetic environment. In engineering applications,the corresponding elevation correction is required. For the distance to the ground controlled by the synthetic field intensity, the distanceto the ground increases by 6% for every 1000m. For radio interference, the limit value of radio interference increases by 1dB for every300m increase in altitude, taking 1000m as the reference. For audible noise, for every 1000m increase in elevation, the audible noise increases by 2.2 dB for correction.
    Key words: high altitude; UHVDC; electromagnetic environment; synthetic field intensity; radio interference; audible noise
 
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