多元受阻酚抗氧剂对交联聚乙烯绝缘直流击穿行为的影响  

Effect of multi-hindered phenolic antioxidant on DC breakdown behavior of XLPE insulation

作　　者：张大维 尹渭 章迅 ZHANG Dawei;YIN Wei;ZHANG Xun(State Grid Shanghai Electric Power Research Institute,Shanghai 200051,China)

机构地区：[1]国网上海市电力公司电力科学研究院,上海200051

出　　处：《绝缘材料》2023年第1期8-13,共6页Insulating Materials

基　　金：国网上海市电力公司科技项目(52090020007G)。

摘　　要：受阻酚型抗氧剂常用于XLPE绝缘中的主抗氧剂以提升其加工特性和长时电气特性,为了深入探讨受阻酚抗氧剂对XLPE绝缘直流击穿行为的影响,本文制备了两种含有不同多元受阻酚抗氧剂的XLPE绝缘试样,并对其性能进行测试。结果表明:添加受阻酚抗氧剂可以明显提升XLPE绝缘的电气强度与击穿稳定性,这是由于添加受阻酚抗氧剂能够向XLPE绝缘中引入深陷阱,提高了陷阱密度,但是两种多元受阻酚抗氧剂引入的深陷阱能级与类型不同,因此对XLPE绝缘电气强度的提升程度不同;此外,添加受阻酚抗氧剂有利于提高XLPE的结晶度与结晶均匀性,但影响并不明显。Hindered phenolic antioxidant is a main antioxidants commonly used in cross-linked polyethylene(XLPE) insulation to improve its processability and long-term electrical performance. In order to discuss the effect of hindered phenolic antioxidants on the DC breakdown behavior of XLPE insulation deeply, two kinds of XLPE insulation samples containing different multi-hindered phenolic antioxidants were prepared, and their properties were measured. The results show that the addition of hindered phenolic antioxidants can obviously improve the electric strength and breakdown stability of XLPE insulation, this is because the addition of hindered phenolic antioxidant can introduce deep traps into XLPE insulation and increase the trap density. However, the energy levels and types of deep traps introduced by the two multi-hindered phenolic antioxidant are different, therefore the effects of them on the improving the electric strength of XLPE insulation are different. In addition, the addition of hindered phenol antioxidant can improve the crystallinity and crystallization uniformity of XLPE, but the effect is not obvious.

关 键 词：交联聚乙烯 受阻酚抗氧剂 直流击穿特性 结晶 电荷陷阱 

分 类 号：TM215.1[一般工业技术—材料科学与工程]