电压极性和加压时间对XLPE电力电缆等温松弛电流的影响  

Effect of Voltage Polarity and Time Duration on Isothermal Relaxation Currents of XLPE Power Cables

作　　者：蔡世凯 鲁志伟[1] 庞丹 庞伶琦 毛雷 于建立[1] 蔡新景[1] CAI Shikai;LU Zhiwei;PANG Dan;PANG Lingqi;MAO Lei;YU Jianli;CAI Xinjing(Northeast Electric Power University,Jilin 132012,China;State Grid Changchun Power Supply Company,Changchun 130021,China;North China Electric Power University,Beijing 102206,China;Jilin CAS Cable Accessories Co.,Ltd,Changchun 130507,China)

机构地区：[1]东北电力大学,吉林吉林132012 [2]国网长春供电公司,长春130021 [3]华北电力大学,北京102206 [4]吉林省中科电缆附件有限公司,长春130507

出　　处：《吉林电力》2019年第4期19-22,共4页Jilin Electric Power

摘　　要：针对电力电缆老化状态评估中较有效的等温松弛电流法,研究了振动噪声对等温松弛电流的影响,等温松弛电流的可重复性,电压极性和加压时间对等温松弛电流的影响。试验结果表明,等温松弛电流的可重复性较好,改变电压极性不一定改变松弛电流的极性,即存在反常放电电流现象,极化时间30 min交联聚乙烯极化已达到稳定状态。Isothermal relaxation current method is an effective way to evaluate the aging state of crosslinked polyethylene insulated power cables.In this paper,the effect of vibration noise on isothermal relaxation current is firstly investigated,and the repeatability of isothermal relaxation current is studied,finally the effects of voltage polarity and time duration on isothermal relaxation current are considered.It is shown that the repeatability of isothermal relaxation current is good,and the relaxation current polarity is not necessarily altered when the voltage polarity is changed.The polarization of crosslinked polyethylene achieves a stable state if the polarization time is 30 min.

关 键 词：交联聚乙烯电力电缆 等温松弛电流 陷阱 费米能级 导带 

分 类 号：TM85[电气工程—高电压与绝缘技术] TM247[一般工业技术—材料科学与工程]