特高压交流输电线路有源电视干扰特性  

Active Television Interference Characteristic of UHV AC Transmission Line

作　　者：谢辉春[1] 刘震寰[1] 万皓[1] 陈玉龙[1] 张业茂[1] 

机构地区：[1]中国电力科学研究院,武汉430074

出　　处：《高电压技术》2013年第6期1434-1440,共7页High Voltage Engineering

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

摘　　要：高压交流输电线路电晕或间隙放电会产生电视频段的电磁干扰(TVI)。针对目前国内外对于高压线路特别是特高压交流线路产生的TVI研究匮乏的情况,在介绍国外TVI特性测试方法的基础上,提出了高压交流输电线路TVI的测试方法。在好天气条件下,对我国某特高压交流试验示范工程线路直线档距及耐张塔周边区域带电前后的电视画面状况、TVI场强、电视信号场强进行了多次测试,分析了该线路周边电视画面受干扰特征。结果表明:好天气下,特高压单回线路TVI场强随离边相外距离增加呈负指数衰减。分析认为,国外仅采用CISPR准峰值(QP)检波方式来评估TVI引起的电视画面干扰情况值得商榷。Corona and sparking on high voltage transmission line will bring television interference（TVI）. However, studies on active TVI from HV transmission lines, especially the HVAC lines, are in obvious shortage. Thus, by introducing aborad test methods of TVI characteristics, we put forward test methods of TVI from HVAC transmission lines. Under good weather condition, several tests about TV picture, TVI field strength, the television signal field strength before and after energizing the lines, has been carried near some straight spans and tention towers of Chinese UHV AC Pilot Demonstration Project. According to the results, the TVI＇ s interference characteristics to TV picture have been analyzed. The analysis indicates that, with increasing distance from the outer phase, the TVI field strength from a UHV single circuit in good weather attenuates negative exponentially. Further discussion concluded that the method of using CISPR quasi-peak value for the assessment of interference on TV picture caused by UHV transmission line corona and sparking noise, which is adopted abroad, needs to be further evaluated.

关 键 词：特高压 交流 输电线路 电视干扰 有源干扰 电视画面 

分 类 号：TM721.2[电气工程—电力系统及自动化]