绝缘材料2023,56(7)章彬等：国产与进口高压电缆交联聚乙烯绝缘耐热老化性能对比分析国产与进口高压电缆交联聚乙烯绝缘耐热老化性能对比分析章彬1，徐曙1，巩俊强1，张成巍1，黎小林2，傅明利2，侯帅2，展云鹏2（1.深圳供电局有限公司，广东深圳518000；2.南方电网科学研究院有限责任公司，广东广州510663）摘要：对国产与进口两种220kV电缆交联聚乙烯（XLPE）绝缘在90℃和135℃进行加速热老化试验，探究不同温度和不同时间的热老化条件对XLPE绝缘理化性能、力学性能和电气性能的影响规律，评估国产和进口XLPE绝缘的热老化寿命。结果表明：热老化引发的氧化反应导致XLPE试样中羰基峰的出现，老化温度越高，羰基峰越明显。老化后，XLPE试样的交联程度增加，破坏了结晶区的晶体结构，使结晶度下降，导致力学性能总体上出现了劣化。老化试样的分子链发生了断裂、降解，在电场作用下载流子运动加剧，致使交流电气强度下降。热老化寿命评估表明，国产XLPE绝缘料的热老化寿命大于进口XLPE绝缘料。综合对比各项性能表明，国产XLPE绝缘料与进口XLPE绝缘料水平相当。关键词：交联聚乙烯；热老化；理化性能；力学性能；电气性能中图分类号：TM215DOI:10.16790/j.cnki.1009-9239.im.2023.07.006ComparativeanalysisonheatageingresistanceofdomesticandimportedXLPEinsulationforhighvoltagecablesZHANGBin1,XUShu1,GONGJunqiang1,ZHANGChengwei1,LIXiaolin2,FUMingli2,HOUShuai2,ZHANYunpeng2(1.ShenzhenPowerSupplyBureau,Shenzhen518000,China;2.ResearchInstituteofChinaSouthernPowerGrid,Guangzhou510663,China)Abstract:Thedomesticandimported220kVcross-linkedpolyethylene(XLPE)cableinsulationwerecarriedoutacceleratedthermalageingtestsat90℃and135℃,andtheeffectsofthermalageingwithdifferenttemperatureanddifferenttimeonthephysicalandchemicalproperties,mechanicalproperties,andelectricalpropertiesofXLPEinsulationwereinvestigated.ThethermalageinglifeofdomesticandimportedXLPEinsulationwereevaluated.TheresultsshowthattheoxidationreactioninducedbythermalageingleadstotheappearanceofcarbonylpeakintheXLPEsample,andthehighertheageingtemperature,themoreobviousthecarbonylpeak.Afterageing,thecross-linkingdegreeofXLPEsamplesincreases,whichdamagesthecrystalstructureinthecrystallizationzoneanddecreasesthecry...
