雾霾气象条件下线路绝缘子的积污特性分析

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1、华中科技大学硕士学位论文AbstractStudyingonthenaturalcontaminationcharacteristicsofinsulatorscanprovidetheoperationandmaintenanceofelectricpowerequipmentinsulationanimportantreference,inordertoreducetheoccurrenceofflashoveraccidents.Theinsulationproblembecomesmorecomplicate

2、dandgrimsincefog-hazeweatheroccursfrequently.Thispaperfocusesonthecontaminationcharacteristicsoflineinsulatorsunderfog-hazeenvironment.Firstly,thispaperresearchesonthephysicalandchemicalcharacteristicsoflineinsulatorsunderfog-hazeenvironment.Basedona±800kVDCtra

3、nsmissionline,a1000kVDCtransmissionline,a35kVACtransmissionlineinHenanProvice,thecontaminationsamplesoftherunningXP-70insulatorsunderlong-cyclefog-hazeenvironmentweretested.Water-solublenon-metallicions,water-solublemetalion,insolublematerial,carbon-containingc

4、ompounds,conductivity,PHvalueweremeasuredandanalyzed.ComparedwiththecomponentsofPM2.5ofthetestpointsinHenanProvince,intheaspectsofwater-solublecomponents,totalcarbon(TC),particleaspects,itisfoundthatPM2.5isnotthemajorsourceofinsulatorsurfacepollutants,whileSO,N

5、O222havegreatinfluencesonthecontentsofSO4,NO3ininsulatorsurfacepollutants.Meanwhile,thispaperanalyzesonthecontaminationdegreeonthesurfaceofXP-70typeinsulatorunderfog-hazeenvironment.Thecontaminationtestonthe±800kVDCtransmissionlineshowsthatthelowestequivalent

6、saltdepositdensity(ESDD)andnonsolubledepositdensity(NSDD)are0.038mg/cm2and0.091mg/cm2respectively(inJune);whilethehighestare0.113mg/cm2and0.303mg/cm2respectively(inDecember).ESDDsandNSDDsofinsulatorsonvaryingheightdifferencewiththelawofverticaldistributionofPM2

7、.5,PM10,NOconcentrations.BasedonthefiberESDDmeasuringinstrument,2themeasuredESDDdailyincrementinanexperimentstationinPingdingshanregionincreaseswithAQI,approximatelyasLogisticfuction.Calculatedbygrayrelationanalysismethod,itisfoundthatamongthefog-hazecomponents

8、,thepollutioneffectofSOon2solublepollutantsisgreater,andthepollutioneffectofPM10oninsolublepollutantsisIII万方数据华中科技大学硕士学位论文greater;withtheincreaseoftheconcentrationsofPM2.5,P