直流复合绝缘子不均匀污秽闪络特性的研究.pdfVIP

直流复合绝缘子不均匀污秽闪络特性研究 罗兵1 饶宏1 黎小林1 宿志一2 周军1 (1．中国南方电网公司电网技术研究中心2．中国电力科学研究院) onUn—unif6rmPollutionFlashoverCharacteristicof Study DC Insulators Composite Luo Lixiaolinl BinglRaohongl Suzhiyi2Zhoujun2 ResearchCenter2．ChinaElectricPowerResearch (1．CSGTechnology Institude) ofDC the Absl瑁ct-Un-uniformflashovercharacteristic inshulatorsand of pollution composite promotingrange flashover under statusarestudiedinthis correctionformulaof pollution voltage hydrophobic paper．The un-uniformflashover0fDC insulatoris forthefirstlimeinthewoddandthe pollution voltagecomposite presented correction flashoveriS0btained resuRs thatthe of coe俏dentof Indicete effectthe pollution voltage too．n怕study un-uniformdistributionon surfaceof insulatorshedonflashoverissmaller pollution top／bottom composite voltage thanthatof or insulators．ThecorrectioncoeffidentofDC insulatoris1．065．TheDC porcelainglass composite flashoverunder statusis 153％thanthatunder status． pollution gradienthydrophobicbigger hydrophilic Words=DCinsulator．un-uniform characteristic Key composite pollution；flashover 摘要：本文研究了直流复合绝缘子不均匀污秽闪络特性以及憎水性条件下污闪电压的提高幅度．提出了直流复合绝 缘子不均匀污秽闪络屯压的修萨系数公式，获得了修诈系数．研究结果表明，污秽在上下表面不均匀分布对复合绝 缘子污闪电压的影响比瓷或玻璃绝缘子的影响小，直流复合绝缘子上下表面污秽不均匀校正系数为1．065，复合绝缘 子在憎水性下直流污闪梯度比亲水性下高出近153％． 关键字t直流复合绝缘子；不均匀污秽；闪络特性 前言 人工污秽试验中绝缘子的染污一般是均匀的，而高压瓷绝缘子串在自然环境中带电运