植物油-纸绝缘气隙放电形态及发展特征

doi:10.19595/j.cnki.1000-6753.tces.161935

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摘要气隙缺陷是油纸绝缘常见的局部放电缺陷模式。随着植物绝缘油变压器的推广应用,研究植物油-纸绝缘气隙放电及其特征具有重要的意义。论文采用气隙放电模型和模拟油箱,从放电机理的角度对比分析了植物油-纸绝缘与矿物油-纸绝缘气隙放电的起始放电参数,结合电流脉冲波形和RGB统计图谱,对比分析了整个气隙放电发展过程中的形态特征。结果表明,相比于矿物油-纸绝缘,植物油-纸绝缘气隙放电阶段特征更加明确,具有较低的起始放电电压,较小的初始相位,较少的气隙放电双峰脉冲,较小的放电量,较多的放电次数和更明显的“兔耳”谱图。实验结果为有效识别植物油-纸绝缘气隙放电及其发展特征提供了参考。

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	崔鲁
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Abstract：Air-gapdefectisacommonpartialdischarge(PD)defecttypeofoil-paperinsulation.Withtheincreasingapplicationoftransformersfilledwithvegetableinsulationoils,itisofgreatsignificancetoinvestigatetheair-gapPDanditscharacteristicsofvegetableoil-paperinsulation.Inthispaper,atypicalair-gapmodelandasimulativeoiltankwereadopted;fromtheperspectiveofPDmechanism,air-gapPDinceptionparametersofvegetableoil-paperinsulationwerecomparedwiththoseofmineraloil-paperinsulation;dischargecharacteristicsduringthewholeair-gapPDdevelopmentprocesswereinvestigatedbyanalyzingcurrentpulsewaveformsandRGBstatisticalpatterns.Itwasfoundthat,theair-gapPDcharacteristicsofvegetableoil-paperinsulationaremoreremarkable,withlowerPDinceptionvoltage,smallerinceptionphaseangle,fewerdouble-peakPDpulses,lowerchargeamplitude,higherrepetitionrateandmoreobvious‘rabbit-ear’patternsthanmineraloil-paperinsulation,whichprovideareferenceforidentifyingair-gapPDanditsdevelopmentcharacteristicsinvegetableoil-paperinsulation.

Key words： Transformer vegetableoil-paperinsulation air-gapdischarge stagecharacteristics

收稿日期: 2016-12-11 出版日期: 2018-02-26

PACS:

TM835

基金资助:国家杰出青年科学基金（51425702）和高等学校学科创新引智计划（111计划）（B08036）资助项目

通讯作者: 陈伟根男,1967年生,博士,教授,博士生导师,研究方向为电气设备在线智能监测及诊断。E-mail：weigench@cqu.edu.cn

作者简介: 崔鲁男,1993年生,博士研究生,研究方向为变压器植物油-纸绝缘局部放电特征分析方法和油中溶解气体分析。E-mail：cuilu@cqu.edu.cn

引用本文:

崔鲁, 陈伟根, 杜劲超, 李剑. 植物油-纸绝缘气隙放电形态及发展特征[J]. 电工技术学报, 2018, 33(3): 618-626. CuiLu, ChenWeigen, DuJinchao, LiJian. InvestigationonAir-GapDischargePatternsandDevelopmentCharacteristicsofVegetableOil-PaperInsulation. Transactions of China Electrotechnical Society, 2018, 33(3): 618-626.

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