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1、第41卷第16期電力系統(tǒng)保護(hù)與控制voI.41No.162013年8月l6日PowerSystemProtectionandControlAug.16,2013高壓直流輸電線路邊界高頻電壓信號(hào)衰減特性分析孔飛,張保會(huì),甄威,張愛玲。(1.西安交通大學(xué)電氣工程學(xué)院,陜西西安710049;2.四川電力科學(xué)研究院,四川成都6100723.許繼集團(tuán)有限公司,河南許昌461000)摘要:高壓直流輸電線路兩端安裝的直流濾波器和平波電抗器形成了高頻電壓信號(hào)的線路邊界,利用這種邊界特性可以構(gòu)成新型線路保護(hù),但線路邊界參數(shù)及配置方式的差異會(huì)對(duì)線路邊界高頻
2、電壓信號(hào)衰減程度造成影響基于現(xiàn)有直流輸電工程的直流濾波器與平波電抗器的參數(shù)及配置原則,研究了不同直流濾波器結(jié)構(gòu)、不同平波電抗器配置方式以及直流濾波器與平波電抗器元器件不同參數(shù)對(duì)直流輸電線路邊界高頻電壓信號(hào)衰減特性的影響。結(jié)果表明,不同參數(shù)及配置形式的線路邊界對(duì)高頻電壓信號(hào)均有較大衰減,可以依據(jù)高頻電壓信號(hào)在區(qū)內(nèi)外故障時(shí)的差異構(gòu)成新型直流輸電線路保護(hù)。關(guān)鍵詞:線路邊界;平波電抗器;直流濾波器;高頻電壓信號(hào);衰減特性Analysisonhighfrequencyvoltagesignalattenuationcharacteristicof
3、HVDCtransmissionlineboundaryKONGFei,ZHANGBao_hui,ZHENWei,ZHANGAi.1ing(1.SchoolofElectricalEngineering,Xi’anJiaotongUniversity,Xi’an710049,China;2.SichuanElectricPowerResearchInstitute,Chengdu610072,China;3.XJGroupCorporation,Xuchang461000,China)Abstract:Thelineboundaryof
4、highfrequencyvoltagesignaliscomposedofDCfilterandsmoothingreactorinstalledatbothendsofHVDCtransmissionline,whichCanbeusedtoproposenewprinciplebasedprotections.However,thedifferencesofcomponentparameterandallocationprincipleafectthehighfrequencyvoltagesignalaRenuationofth
5、elineboundary.Thus,analysisoftheattenuationcharacteristicispresented.BasedonthepresentHVDCprojectcomponentparameterandallocationprincipleofDCfilterandsmoothingreactor,thispaperstudiesthehighfrequencyvoltagesignalattenuationcharacteristicofHVDCtransmissionlinewithdiferent
6、DCfilterstructures,diferentarrangementsofsmoothingreactor,anddiferentcomponentparameters.TheresultsshowthatHVDClineboundarieswithdiferentcomponentparametersandallocationprinciplecauselargeatenuationofhighfrequencyvoltagesignal,andthedifferenceofhighfrequencyvoltagesignal
7、wheninternalfaultandexternalfaultoccurcanbeusedtoformthenovelHVDClineprotections.ThisworkissupposedbyNationalNaturalScienceFoundationofChina(No.50977074)andScienceandTechnologyProjectOfSGCC.Keywordsglineboundary;smoothingreactor;DCfilter;highvoltagefrequencysignal;atenua
8、tioncharacteristic中圖分類號(hào):TM71文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1674—3415(2013)16—0085.06諧波分量L3J。從直流濾波器及平波電抗器的作用不0引言難得知,它們均是直流輸