摘要
为解决输电线路对短波无线电测向台(站)的无源干扰问题,通过改变计算模型中参数的方法,研究了输电线路在无线电波激励下对无线电测向台的电磁干扰影响因素及影响规律。研究结果表明,计算无源干扰时,入射波方向应取0或90的最大影响方向,且铁塔阵列中的铁塔数目取30座可以满足计算精度需求。还计算了不同电压等级的输电线路对短波无线电测向台的保护间距,相比之下,国标规定的保护间距较为保守。依据文中的研究结果和以往工程中的实践经验,提出了为降低输电线路对短波无线电测向台的无源干扰,可在输电线路方面和短波无线电测向台方面采取的防护措施。
To reduce passive interference caused by transmission lines with short-wave frequency direction-finding stations, the impacting factors and law of electromagnetic interferences caused by transmission line on direction-finding station under the energizing of radio wave were researched by means of changing parameters in computation model. Research results showed that during the computation of passive interference the directions of 0~ or 90~, which brought about the strongest interferences, should be chosen as the direction ofincident wave, and to meet the requirement of computational accuracy it was appropriate to choose the number of iron towers as 30. The protection distances for short-wave frequency direction-finding stations were computed in the case of various transmission lines in different voltage classes. Comparing computation results with protection distances specified in China National Standard, it was shown that the protection distances specified in China National Standard were relatively conservative. Based on the research results and according to practical experiences from actual projects, the protective measures, which could be applied to transmission lines and direction-finding stations respectively, were proposed to reduce passive interference caused by transmission lines with short-wave frequency direction-finding stations.
出处
《电网技术》
EI
CSCD
北大核心
2012年第5期22-28,共7页
Power System Technology
关键词
输电线路
无线电测向台
无源干扰
保护间距
transmission line
direction-finding station
passive interference
protection distance
