文档名：220kV退役复合绝缘子芯棒整体回收再利用可行性研究
摘要：复合绝缘子在输电线路中得到了大规模应用,但早期投运的复合绝缘子开始批量退役,且数量逐年增加,因此,需要有效的回收利用方法来处理退役的复合绝缘子.该文以220kV退役复合绝缘子芯棒的高压段、中间段和低压段作为研究对象,对比了退役芯棒与新芯棒的物理、热学、电气及力学性能和微观形貌差异,并基于性能评估结果进行推广,探索了退役芯棒的再利用价值和快速性能评估手段.结果表明,退役芯棒的环氧树脂基体含量下降程度保持在1.31%以内,饱和吸湿率小于0.008%;击穿强度基本保持在20kV/mm以上,水煮6天泄漏电流值保持在50μA以内,具有良好的电气强度和绝缘性能;拉伸、弯曲和剪切强度分别保持在640MPa、1500MPa和130MPa以上,力学性能保持较高水平;内部纤维及树脂基体界面粘结性较好,材料孔隙率保持在1%以内,无明显大孔隙出现.总体而言,退役芯棒的整体性能良好,具有较高的回收再利用价值.研究结论对实现退役芯棒的高效回收再利用具有重要的参考价值.
Abstract：Thesimplemanufacturingprocessandhighhydrophobicityofcompositeinsulatorssolvesthepollutionflashoverprobleminpollutedareas.Therefore,compositeinsulatorsarewidelyusedinChina'spowersystem.However,earlycompositeinsulatorsarebeingretiredinbatches.Landfilldumping,discarding,andothermethodsaretypicallyusedforthedisposaloftheretiredcompositeinsulators.Thisapproachcauseswastageofresourceandharmstheenvironment.Becauseoftheprotectionofsiliconerubberoutersheath,theexternalenvironmenthasalimitedeffectonthecorerod.Thecorerodexhibitshighrecyclingvalueafterretirement.Inordertopromotethehigh-valueutilizationofretiredinsulatorcores,thedegreeofperformancedegradationandmicrostructureofretiredcompositeinsulatorcorerodsfor220kVareinvestigated,andthereusevalueandrapidperformanceevaluationmethodsofretiredcorerodsareexplored.Firstly,thehigh-voltage,middle,andlow-voltagesectionsofthe220kVretiredcompositeinsulatorcorerodswereconsidered.Thephysical,thermal,electricalandmechanicalcharacteristicsoftheretiredcorerodswerecomparedwiththoseofnewcorerods.Theresultsrevealthatcomparedwithnewcorerods,theepoxyresinmatrixcontentoftheretiredcorerodsisonlyreducedby1.31%,withnopenetrationphenomenonafter30minutesofdyepenetration,andsaturatedmoistureabsorptionislessthan0.008%.Thephysicalandchemicalpropertiesremaingood;Thebreakdownstrengthofretiredcorerodsismaintainedtobehigherthan20kV/mm,andthemaximumleakagecurrentismaintainedwithin50μAafter6daysofboiling.Theseresultsrevealexcellentelectricalstrengthandinsulationperformanceoftheretiredcorerods;Thetensilestrength,bendingstrengthandshearstrengtharekeptabove640MPa,1500MPaand130MParespectively,andtheretiredcorerodsstillexhibithighmechanicalbearingstrength.Secondly,themicrostructureofretiredcorerodswasconsidered.Theresultsrevealthattheirporosityisrelativelylow,withnoobviouslargepores.Thesmallporesof10μm3aremainlypresent,effectivelyinhibitingthedevelopmentofbreakdownprocessandwaterinfiltration;Theepoxyresinmatrixandfiberinterfaceexhibitexcellentadhesion,absorbingalargeamountoffractureenergyduringload-bearingfailure,whichhelpstofullyutilizethefiberstrengthandisthereasonwhyretiredcorerodscanstillmaintainhighmechanicalstrength.Finally,bysortingtheperformancedegradationofretiredcorerods,itisfoundthattheirelectricalperformancedecreasesmoresignificantly,andthedegreeofperformancedegradationinthehigh-voltagesectionisrelativelyhigh.Therefore,electricalperformancecanbeusedasamethodtoquicklyevaluatethevalueofreuse,andthemiddleandlowvoltagesectionscanbeprioritizedintheoverallreuseprocess.Theretiredcorerodsexhibitexcellentphysicalandthermalproperties,electricalstrength,insulationperformance,andmechanicalbearingcapacity,andhavehighreusevalue.Prioritycanbegiventooverallreuseforelectricalinsulationcomponentssuchascompositeinsulators,orformechanicalbearingcomponents,topromotethehigh-valueutilizationofretiredcorerods.
作者：刘贺晨 胡如法 刘云鹏 李乐 刘杰 Author：LiuHechen HuRufa LiuYunpeng LiLe LiuJie
作者单位：河北省绿色高效电工新材料与设备重点实验室(华北电力大学)保定071003;新能源电力系统全国重点实验室(华北电力大学)北京102206河北省绿色高效电工新材料与设备重点实验室(华北电力大学)保定071003国网河北省电力有限公司电力科学研究院石家庄050021
刊名：电工技术学报 ISTICEIPKU
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(11)
分类号：TM21
关键词：退役复合绝缘子 芯棒 整体回收再利用 性能评估 再利用价值
Keywords：Retiredcompositeinsulator corerods overallrecycling performanceevaluation reusevalue
机标分类号：TF811TK224.11S794.908
在线出版日期：2024年6月18日
基金项目：中央高校基本科研业务费专项资金资助项目220kV退役复合绝缘子芯棒整体回收再利用可行性研究[
期刊论文] 电工技术学报--2024, 39(11)刘贺晨 胡如法 刘云鹏 李乐 刘杰复合绝缘子在输电线路中得到了大规模应用,但早期投运的复合绝缘子开始批量退役,且数量逐年增加,因此,需要有效的回收利用方法来处理退役的复合绝缘子.该文以220kV退役复合绝缘子芯棒的高压段、中间段和低压段作为研究...参考文献和引证文献
参考文献
引证文献
本文读者也读过
相似文献
相关博文
220kV退役复合绝缘子芯棒整体回收再利用可行性研究 Feasibility of the Overall Recycling of 220 kV Retired Composite Insulator Core Rods
220kV退役复合绝缘子芯棒整体回收再利用可行性研究.pdf
- 文件大小:
- 3.05 MB
- 下载次数:
- 60
-
高速下载
|
|
