过氧化二异丙苯交联剂对XLPE击穿及陷阱特性的影响  

Effect of Dicumyl Peroxide Crosslinking Agent on Breakdown and Trap Characteristics of XLPE

作　　者：周韫捷 李海 叶颋 王骁迪 韩琴琴 严智民 ZHOU Yunjie;LI Hai;YE Ting;WANG Xiaodi;HAN Qinqin;YAN Zhimin(State Grid Shanghai Electric Power Company, Shanghai 200122, China;State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China)

机构地区：[1]国网上海市电力公司,上海200122 [2]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《绝缘材料》2018年第12期6-10,共5页Insulating Materials

摘　　要：通过表面电位衰减法(SPD)和工频击穿实验研究了过氧化二异丙苯(DCP)含量对XLPE试样击穿与陷阱特性的影响。结果表明:随着DCP含量的增加,XLPE的电气强度及深陷阱密度均呈先增大后减小的趋势,两者均在DCP质量分数为0.5%时达到最大值,这是由于未掺杂DCP时,试样内部的陷阱以浅陷阱为主,电气强度较低,随着DCP含量增加,交联过程中在XLPE内部引入了更多的深陷阱,电气强度升高。但DCP含量进一步增加时,深陷阱密度开始减小,电气强度降低。当DCP质量分数为0.5%～1.0%时有利于提高XLPE的击穿特性。The effects of dicumyl peroxide (DCP) content on the breakdown and trap characteristics of XLPE were studied by surface potential decay (SPD) and power frequency breakdown experiment. The results show that the electric strength and deep trap density of XLPE increase at first and then decrease with the increase of DCP content, and both of them reach the maximum value when the DCP mass frac tion is 0.5%. This is because there are mainly shallow traps in the sample without DCP doped, and the electric strength is low. With the increase of DCP content, there are more deep traps introduced into XLPE during crosslinking process, and the electric strength increases. However, with the further increase of DCP content, the deep trap density begins to decrease, and the electric strength decreases. When the DCP mass fraction is 0.5%~1.0%, it is beneficial to improve the breakdown characteristic of XLPE.

关 键 词：XLPE 过氧化二异丙苯 表面电位衰减 陷阱 击穿 

分 类 号：TM215[一般工业技术—材料科学与工程]