乙丙橡胶表面电痕腐蚀对极化/去极化电流的影响
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摘要
为了探究乙丙橡胶绝缘的表面电痕放电对其极化去极化电流的影响,文中依据IEC 60587:2007模拟乙丙橡胶在实际运行中的表面污秽环境,对乙丙橡胶绝缘试样进行了电痕放电试验,分析了电痕的形成机理,测量了不同电痕腐蚀程度的试样的极化/去极化电流。试验结果表明:绝缘的潮湿污秽区域极易产生泄漏电流,并导致干燥区的形成。在干燥区内引发的重复放电会进一步破坏绝缘表面,从而形成电痕放电。乙丙橡胶的极化电流与其表面电痕腐蚀程度有关:随着乙丙橡胶表面电痕腐蚀程度加重,乙丙橡胶电导率升高,极化电流逐渐增大。
To investigate the surface trace and surface discharge of the ethylene-propylene rubber (EPR) and the influence of the trace on polarization/depolarization current (PDC),an aging experiment was conducted according to the standard IEC 60587:2007 to simulate the surface dirty environment and to analyze the formation mechanism of surface electrical trace. Then,the PDC of EPR with different state of erosion was measured. The results indicated that the leakage current was easy to occur in the wet and dirty area,resulting in the formation of dry zone. Repetitive discharge in the dry zone could further damage the surface of insulation and lead to surface discharge. The insulation resistance of EPR was related to the erosion degree of the surface electrical trace. With the increase of erosion degree of surface trace on EPR,it sconductivity and PDC increased.
To investigate the surface trace and surface discharge of the ethylene-propylene rubber (EPR) and the influence of the trace on polarization/depolarization current (PDC),an aging experiment was conducted according to the standard IEC 60587:2007 to simulate the surface dirty environment and to analyze the formation mechanism of surface electrical trace. Then,the PDC of EPR with different state of erosion was measured. The results indicated that the leakage current was easy to occur in the wet and dirty area,resulting in the formation of dry zone. Repetitive discharge in the dry zone could further damage the surface of insulation and lead to surface discharge. The insulation resistance of EPR was related to the erosion degree of the surface electrical trace. With the increase of erosion degree of surface trace on EPR,it sconductivity and PDC increased.
引文
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[21]王林,周利军,李先浪,等.应用极化/去极化电流法分析油纸绝缘微水扩散暂态过程[J].高电压技术,2013,39(2):354-359.WANG Lin,ZHOU Lijun,LI Xianlang,et al.Analysis of transient moisture diffusion in oil-paper insulation using polarization and depolarization current method[J].High Voltage Engineering,2013,39(2):354-359.
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[23]SAHA T K,PURKAIT P,MULLER F.Deriving an equivalent circuit of transformers insulation for understanding the dielectric response measurements[J].IEEE Transactions on Power Delivery,2005,20(1):149-157.
[24]HOUHANESSIAN V D,ZAENGL W S.Time domain measurements of dielectric response in oil-paper insulation systems[C]//Conference Record of the 1996 IEEE International Symposium on Electrical Insulation.Montreal,Que:IEEE,1996:47-52.
[25]宋伟,申文伟,王国利,等.电晕放电老化对高温硫化硅橡胶材料陷阱特性的影响[J].高电压技术,2013,39(4):979-986.SONG Wei,SHEN Wenwei,WANG Guoli,et al.Influence of corona discharge aging on trap characteristics of high temperature vulcanized silicon rubber material[J].High Voltage Engineering,2013,39(4):979-986.
[26]梁英.高温硫化(HTV)硅橡胶电晕老化特性及机理的研究[D].保定:华北电力大学,2008:20-50.LIANG Ying.Study on the corona aging characteristics and mechanism of HTV silicon rubber[D].Baoding:North China Electric Power University,2008:20-50.
[27]梁英,李成榕,丁立健.电晕强度对HTV硅橡胶陷阱特性的影响[J].高电压技术,2009,35(1):135-140.LIANG Ying,LI Chengrong,DING Lijian.Influence of corona intensity on the trap characteristics of HTV silicon rubber[J].High Voltage Engineering,2009,35(1):135-140.
[28]张予,吴光亚,张锐.高温硫化硅橡胶材料的运行特性及分析[J].电瓷避雷器,2006(3):18-22.ZHAN Yu,WU Guangya,ZHANG Rui.Service performance of HTV rubber and its evaluation[J].Insulator and Surge Arresters,2006(3):18-22.
[29]刘晨阳,郑晓泉,彭平.无机微米填料改性聚酰亚胺复合材料非线性电导特性[J].高电压技术,2015,41(12):4137-4143.LIU Chenyang,ZHENG Xiaoquan,PENG Ping.Nonlinear conductivity characteristics of modified polyimide composite materials with inorganic filler[J].High Voltage Engineering,2015,41(12):4137-4143.
[30]李忠华,索长友,郑欢.双层a+bE非线性电导介质界面极化特性的理论研究[J].中国电机工程学报,2016,26(24):6635-6646.LI Zhonghua,SUO Changyou,ZHENG Huan.A theoretical study on the interface polarization properties of nonlinear double-layered dielectrics with a+bE nonlinear conductance[J].Proceeding of the CSEE,2016,36(24):6635-6646.
[31]BHUMIWAT S A.Unusual conduction at oil-paper interface in transformers diagnosed by Polarization depolarization current(PDC)analysis[C]//IEEE Electrical Insulation Conference(EIC).Philadelphia,PA:IEEE,2014:185-188.
[32]陆小虹.EP/ZnO双层复合绝缘界面极化特性实验研究[D].哈尔滨:哈尔滨理工大学,2014:16-30.LU Xiaohong.A study on interface polarization properties of EP/ZnO double layer composite insulation[D].Harbin:Harbin University of Science and Technology,2014:16-30.
[2]ORTON H.History of underground power cables[J].IEEE Electrical Insulation Magazine,2013,29(4):52-57.
[3]DOUAR M A,BEROUAL A,SOUCHE X.Assessment of the resistance to tracking of polymers in clean and salt fogs due to flashover arcs and partial discharges degrading conditions on one insulator model[J].IET Generation,Transmission&Distribution,2016,10(4):986-994.
[4]KHAN H,AMIN M,AHMAD A,et al.Erosion/tracking resistance investigation of micro/nano-SiO2 filled RTV-SiRcomposites for outdoor high voltage insulations[C]//14th International Bhurban Conference on Applied Sciences and Technology(IBCAST).Islamabad,Pakistan:IEEE,2017:15-19.
[5]UGUR M,AUCKLAND D W,VARLOW B R.Neural networks to analyze surface tracking on solid insulators[J].IEEE Transactions on Dielectrics and Electrical Insulation,1997,4(6):763-766.
[6]固体绝缘材料耐电痕化指数和相比电痕化指数的测定方法:GB/T 4207-2012[S].2013.Method for the determination of the proof and the comparative tracking indices of solid insulating materials:GB/T 4207-2012[S].2013.
[7]在严酷环境条件下使用的电气绝缘材料耐电痕化和蚀损的试验方法:GB/T 6553-2003[S].2003.Electrical insulating materials used under severe ambient conditions-test methods for evaluating resistance to tracking and erosion:GB/T 6553-2003[S].2003.
[8]杜伯学.有机绝缘耐电痕性的评定与发展[J].高电压技术,2005,31(5):10-13.DU Boxue.Research and development of test method on tracking resistance of polymer insulating materials[J].High Voltage Engineering,2005,31(5):10-13.
[9]ZHANG G B,WU Q H,QU B J.Effects of organic colorants on photo-initiated crosslinking and photo-oxidation degradation of polyethylene and related mechanism[J].Chinese Journal of Polymer Science,2008,26(3):311-319.
[10]冯晨.基于绝缘电阻的电缆用乙丙橡胶绝缘表面电痕故障诊断方法研究[D].太原:太原理工大学,2016:22-23.FENG Chen.Study on surface electrical tracking fault diagnosis of the cable used ethylene propylene rubber based on insulation resistance[D].Taiyuan:Taiyuan University of Technology,2016:22-23.
[11]SESHADRI S R.Effect of insulation on the radiation resistance of an electric dipole in a simple anisotropic medium[J].Electrical Engineers,Proceedings of the Institution of,1966,113(4):593-600.
[12]硫化橡胶绝缘电阻率测定:GB/T 1692-1992[S].1992.Vulcanized rubber-determination of the insulation resistivity:GB/T 1692-1992[S].1992.
[13]固体绝缘材料在高温下绝缘电阻和体积电阻率的试验方法:GB/T 10581-1989[S].1989.Method of test for insulation resistance and volume resistivity of insulating materials at elevated temperature:GB/T 10581-1989[S].1989.
[14]肖军.高分子绝缘材料特电痕特性研究[D].天津:天津大学,2005:22-32.XIAO Jun.Research on tracking characteristics of organic insulating materials[D].Tianjin:Tianjin University,2005:22-32.
[15]董典帅.聚合物绝缘材料耐电痕性研究及其非线性分析[D].天津:天津大学,2008:12-20.DONG Dianshuai.Resistance to tracking of polymer materials and nonlinear analysis[D].Tianjin:Tianjin University,2008:12-20.
[16]DU B X,XIAO M.Effects of thermally conducting particles on resistance to tracking failure of polyimide/BN composites[J].IEEE Transactions on Dielectrics and Electrical Insulation,2014,21(4):1565-1572.
[17]DU B X,GUO Y G.Tracking resistance of epoxy/Al2O3nanocomposites under DC voltage[J].IEEE Transactions on Dielectrics and Electrical Insulation,2015,22(1):109-116.
[18]LOGANATHAN N,MUNIRAJ C,CHANDRASEKAR S.Tracking and erosion resistance performance investigation on nano-sized SiO2 filled silicone rubber for outdoor insulation applications[J].IEEE Transactions on Dielectrics and Electrical Insulation,2014,21(5):2172-2180.
[19]张良莹.电介质物理[M].西安:西安交通大学出版社,1991:25-40.ZHANG Liangying.The dielectric physics[M].Xi’an:Xi’an Jiaotong University Press,2000:25-40.
[20]ABOU-DAKKA M,BULINSKI A,BAMJI S S,et al.Depolarization current measurements on field-aged XLPE cable insulation[C]//Annual Report Conference on Electrical Insulation and Dielectric Phenomena.Quebec,QC:IEEE,2008:21-24.
[21]王林,周利军,李先浪,等.应用极化/去极化电流法分析油纸绝缘微水扩散暂态过程[J].高电压技术,2013,39(2):354-359.WANG Lin,ZHOU Lijun,LI Xianlang,et al.Analysis of transient moisture diffusion in oil-paper insulation using polarization and depolarization current method[J].High Voltage Engineering,2013,39(2):354-359.
[22]汤明杰,雷敏,白帆,等.采用向量匹配法的油纸绝缘系统扩展Debye模型参数识别[J].高电压技术,2014,40(2):548-556.TANG Mingjie,LEI Min,BAI Fan,et al.parameter identification based on vector fitting method for extended Debye model of oil-paper insulation system[J].High Voltage Engineering,2014,40(2):548-556
[23]SAHA T K,PURKAIT P,MULLER F.Deriving an equivalent circuit of transformers insulation for understanding the dielectric response measurements[J].IEEE Transactions on Power Delivery,2005,20(1):149-157.
[24]HOUHANESSIAN V D,ZAENGL W S.Time domain measurements of dielectric response in oil-paper insulation systems[C]//Conference Record of the 1996 IEEE International Symposium on Electrical Insulation.Montreal,Que:IEEE,1996:47-52.
[25]宋伟,申文伟,王国利,等.电晕放电老化对高温硫化硅橡胶材料陷阱特性的影响[J].高电压技术,2013,39(4):979-986.SONG Wei,SHEN Wenwei,WANG Guoli,et al.Influence of corona discharge aging on trap characteristics of high temperature vulcanized silicon rubber material[J].High Voltage Engineering,2013,39(4):979-986.
[26]梁英.高温硫化(HTV)硅橡胶电晕老化特性及机理的研究[D].保定:华北电力大学,2008:20-50.LIANG Ying.Study on the corona aging characteristics and mechanism of HTV silicon rubber[D].Baoding:North China Electric Power University,2008:20-50.
[27]梁英,李成榕,丁立健.电晕强度对HTV硅橡胶陷阱特性的影响[J].高电压技术,2009,35(1):135-140.LIANG Ying,LI Chengrong,DING Lijian.Influence of corona intensity on the trap characteristics of HTV silicon rubber[J].High Voltage Engineering,2009,35(1):135-140.
[28]张予,吴光亚,张锐.高温硫化硅橡胶材料的运行特性及分析[J].电瓷避雷器,2006(3):18-22.ZHAN Yu,WU Guangya,ZHANG Rui.Service performance of HTV rubber and its evaluation[J].Insulator and Surge Arresters,2006(3):18-22.
[29]刘晨阳,郑晓泉,彭平.无机微米填料改性聚酰亚胺复合材料非线性电导特性[J].高电压技术,2015,41(12):4137-4143.LIU Chenyang,ZHENG Xiaoquan,PENG Ping.Nonlinear conductivity characteristics of modified polyimide composite materials with inorganic filler[J].High Voltage Engineering,2015,41(12):4137-4143.
[30]李忠华,索长友,郑欢.双层a+bE非线性电导介质界面极化特性的理论研究[J].中国电机工程学报,2016,26(24):6635-6646.LI Zhonghua,SUO Changyou,ZHENG Huan.A theoretical study on the interface polarization properties of nonlinear double-layered dielectrics with a+bE nonlinear conductance[J].Proceeding of the CSEE,2016,36(24):6635-6646.
[31]BHUMIWAT S A.Unusual conduction at oil-paper interface in transformers diagnosed by Polarization depolarization current(PDC)analysis[C]//IEEE Electrical Insulation Conference(EIC).Philadelphia,PA:IEEE,2014:185-188.
[32]陆小虹.EP/ZnO双层复合绝缘界面极化特性实验研究[D].哈尔滨:哈尔滨理工大学,2014:16-30.LU Xiaohong.A study on interface polarization properties of EP/ZnO double layer composite insulation[D].Harbin:Harbin University of Science and Technology,2014:16-30.