基于模态分析法的交流特高压输电线路无线电噪声的预测评估  

Prediction and assessment of radio noise of AC UHV transmission lines based on modal analysis method

作　　者：牛林[1] 杜至刚[2] 赵建国[1] 

机构地区：[1]国家电网技术学院,山东济南250002 [2]国家电网公司,北京100031

出　　处：《电力自动化设备》2009年第5期20-24,共5页Electric Power Automation Equipment

摘　　要：通过对输电线路无线电噪声产生机理的分析,阐明了常用的表示噪声干扰水平的各类统计值的含义。提出基于模态分析法的特高压输电线路无线电噪声的预测模型,有效地解决了分裂导线数目大于4的线路的干扰计算问题。利用建立的预测模型评估了我国1 000 kV级交流特高压试验示范工程线路的无线电噪声水平,评估结果表明:我国交流特高压输电线路的初设结构合理,能够满足环境标准的要求;当导线截面一定时,导体布置方式对无线电及电视干扰的影响较大,设计新线路选择导体布置方式时应考虑三角布置有利于减小无线电噪声;当导体布置方式一定时,导线截面对无线电及电视干扰也会产生较大影响,适当选择导线截面,可使交流特高压输电线路与现有超高压输电线路的无线电噪声水平相当。The generation mechanism of transmission line RN（Radio Noise） is analyzed and some RN level statistics are explained. A RN prediction model based on modal analysis method is presented to effectively calculate the RN of UHV transmission lines with more than 4 conductor bundles, with which, the RN level of China＇s 1 000 kV AC UHV transmission lines is assessed. Results show that, the line configuration design is rational and satisfies the requirements of environment standard; when the conductor section is fixed, the conductor configuration has greater influence on RI and TVI, and the triangle layout is preferable; when the conductor configuration is fixed, the conductor section has greater influence on RI and TV], and the appropriate section should be Selected to make the RN level of AC UHV transmission lines equivalent to that of present EHV transmission lines.

关 键 词：交流 特高压输电线路 无线电干扰 电视干扰 预测 评估 模态分析法 

分 类 号：TM723[电气工程—电力系统及自动化]