特高压直流长、短输电线路无线电干扰的转换关系分析  

Analysis on Radio Interference Transformation Relation Between Long and Short UHVDC Transmission Lines

作　　者：谢莉[1] 陆家榆[1] 张文亮[2] 郭剑[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]国家电网公司,北京市西城区100031

出　　处：《中国电机工程学报》2013年第7期109-115,12,共7页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2011CB209400)~~

摘　　要：研究特高压直流长、短输电线路的无线电干扰转换关系,对于将特高压直流试验基地建设的试验线段和电晕笼内导线的试验结果用于预测实际特高压输电线路的无线电干扰有重要意义。推导了由无线电干扰激发函数表示的任意长度、任意终端阻抗输电线路上无线电干扰的计算公式。该计算公式在几种情况下简化后与国外文献结果的对比,可说明其可靠性。在此基础上,导出了中国特高压直流试验基地建设的试验线段和电晕笼内导线适用的长、短线无线电干扰转换关系。无限长线路的无线电干扰等于试验线段和电晕笼内导线的无线电干扰频率特性曲线极小值包络线乘以相应的转换系数。该研究结果对特高压直流输电工程的电磁环境评估有一定的参考作用。The radio interference（RI） measurements made on the test lines and the lines in the test cages in the UHVDC test base can be used to predict the RI performance of the long lines,which makes it significant to study the RI transformation relation between long and short lines.The RI formula of the transmission line with arbitrary length and arbitrary terminated impedance expressed by the RI excitation function was derived,and it was verified by comparison with the existing results under certain circumstances.Furthermore,the RI transformation relations between long and short lines appropriate for the test line and the line in the test cage in the UHVDC test base of China were obtained.The RI current of the long line can be estimated by the envelope of minima of the RI current frequency spectrum of the test line or the line in the test cage multiplied by the corresponding transformation factor.The results can provide reference for the electromagnetic environment evaluation of UHVDC transmission projects.

关 键 词：特高压直流试验线段 特高压直流电晕笼 长短线路无线电干扰转换关系 无线电干扰激发函数 电晕电流 

分 类 号：TM726[电气工程—电力系统及自动化]