特高压同塔双回交流输电线路采用(8+2)分裂导线与常规导线电晕特性对比  

Corona Characteristic Comparison of (8+2) Bundled Wire and Normal Wire Applying in UHV AC Double-circuit Transmission Line on the Same Tower

作　　者：谢辉春[1,2] 崔翔[1] 刘华钢[2] 陈豫朝[2] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]中国电力科学研究院,武汉430074

出　　处：《高电压技术》2016年第3期966-972,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划项目(973计划)(2011CB209402-3)~~

摘　　要：目前特高压同塔双回路采用常规8×630 mm^2导线,由于线路分裂数对高压线路电磁环境参数影响较大,考虑在确保电磁环境满足要求的前提下,进一步减小导线截面提高工程经济性,为此对比(8+2)×400 mm^2、8×630mm^2及10×400 mm^2等常规分裂型式导线的同塔双回路无线电干扰、可听噪声、电晕损失。首先通过有限元方法对(8+2)×400 mm^2方式新增2根子导线优化排列位置进行了研究,再利用各预测方法对各种导线形式进行了全面对比计算,最后利用特高压交流电晕笼进行了相关对比试验。计算与试验结果均表明:新增2根子导线优化排列位置位于分裂圆底部比较合理;无线电干扰和可听噪声方面,(8+2)×400 mm^2导线在相同方式下比常规8×630 mm^2导线小2 d B左右,与10×400 mm^2导线相差不大。且(8+2)×400 mm^2导线总截面更小,电磁环境更优,有一定工程推广价值。The 8×630 mm^2 bundle conductor is currently employed in Chinese 1 000 k V UHV double-circuit transmission lines, and the sub-conductor number of bundle conductor plays an important role in electromagnetic environment.To further reduce the conductor cross-section so as to improve engineering economy without exceeding the electromagnetic environment requirements, we investigated the radio frequency interference（RI）, audible noise（AN）, and corona loss（CL） of（8＋2）×400 mm^2 compared with normal 8×630mm^2 and 10×400 mm^2 bundle conductors. Firstly, we used the finite element method to study the optimization arrangement position of 2 sub-conductors of（8＋2）×400 mm^2 bundle type. Secondly, we calculated RI, AN, and CL of above bundle types with different prediction methods. Finally, we tested RI, AN, and CL of above conductors by UHV corona test cage. The calculation and experimental results show that it is rational that the arrangement position of 2 sub-conductors with（8＋2）×400 mm^2 bundle type is at the bottom of the bundle. In terms of RI and AN,（8＋2）×400 mm^2 wire is about 2 d B less than common 8×630 mm^2 wire, which is hardly different from 10×400 mm^2 wire. The total cross-sectional area of（8＋2）×400 mm^2 wire is smaller, which is of some engineering promotion value.

关 键 词：特高压交流同塔双回线路 无线电干扰 可听噪声 电晕损失 (8+2)分裂导线 电晕笼 

分 类 号：TM75[电气工程—电力系统及自动化]