基于直流局部放电的高压储能电容器绝缘状态检测的研究

《基于直流局部放电的高压储能电容器绝缘状态检测的研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、西南交通大学硕士学位论文基于直流局部放电的高压储能电容器绝缘状态检测的研究姓名：边姗姗申请学位级别：硕士专业：电力系统及其自动化指导教师：吴广宁20080501西南交通大学硕士研究生学位论文第1I页AbstractHi曲一Voltagefire)storagecapacitoristhecommondeviceinpulsepowersystem，whichiswidelyusedinweapons．Inordertosatisfythedemandofdevelopmentofpulsepowersystem，thestoragedensityo

2、fthiskindcapacitorsmustbeimproved,whichmeansdecreasingthecubageandincreasingthestorageenergycapabilityofdielectrics．Higherload—carryingpropertiesofinsulationdielectricshavetoberequired．Itwillbringhiddentroubletotheinsulationcapabilityandtheworkreliabilityofcapacitors．Detecting

3、theinsulationstateandjudgingtheworkreliabilityofcapacitoraresignificanttotheweaponsystem．TheworkprocessofhighvoltagestoragecapacitorischargedunderDCandlargedischargeinshorttime．Suchprocessisthemaincoursetoinsulationaging．Asforthelargecurrentmagnitudeoflargeimpulse，partialdisch

4、argesignalsCan’tgetthroughsensordirectlyundersuchlargeimpulse．Accordingtotheworkprocessofhighvoltagestoragecapacitor,partialdischargemeasurementunderDCvoltagewasputforward．WiththeanalysisanddischargesimulationaboutDCpartialdischarge(DCPD)，thereisarelationshipbetweendischargepa

5、rametersanddefect，lifespanofinsulation．SotheyCanbeusedtoeffectivelyreflectthesituationofinsulation．Accordingtothemanufacturetechnologyandagingeffect，thedefectsofcapacitorsweredividedintoinnerdefect，contactdefect，overlapdefectandoilinessdefect．Inthisthesis，aDCPDdetectionandanal

6、ysissystemwithhighsensitivityWasusedtocollectandanalyzeDCPDsignalsofcapacitorswithdefects．Asaneffectiveparameter,AtWasintroducedintotheanalysis．Basedon口、船andAt,thedischargespectrumwascalculatedoutasabasicsamplebaseforcapacitorPDsignalanalysis．Basedonthesupportvectormachine(SVM

7、)，thedefecttypesinthestoragecapacitorsandthoseappearedduringtheagingtestcanbeeffectivelyidentified．西南交通大学硕士研究生学位论文第ⅡI页ThisthesismainlydoessomeresearchontheHVstoragecapacitorswhichwereaged．Duetodifferentageddegreeofcapacitor,DCPDmeasurementadoptedthesameconnectionformandthereve

8、rseonerespectively．ThePDparametershadrelationshipwiththeaging