基于光纖光柵傳感系統(tǒng)的電器觸頭溫度場監(jiān)測研究.pdf

1、河北工業(yè)大學(xué)博士學(xué)位論文基于光纖光柵傳感系統(tǒng)的電器觸頭溫度場監(jiān)測研究姓名：陳剛申請學(xué)位級別：博士專業(yè)：電機(jī)與電器指導(dǎo)教師：劉教民20080601河北工業(yè)大學(xué)博士學(xué)位論文IIRESEARCHOFTHELOWVOLTAGEELECTRICAPPARATUSCONTACTTEMPERATUREFIELDBASEDONFILBERGRATINGSENSINGSYSTEMABSTRACTTheelectricarccausedbycutoffto

2、lowvoltageelectricalswitchhasstrongbrightnesshightemperature.Currentdensitypressureinthedisgegapislargewhichmayleadtooverheatingofcontact.Overheatingwillcausethedecreaseofmetal’smechanicalstrengththecreepmeltingtheshtene

3、dlifeofinsulationmaterial.Switchappliancesareusuallyusedinhighvoltagestrongcurrentenvironment，thusstrongtransientoccurredbyaccidentinstantaneousinpowersystemwillcreatestrongelectromagicfieldstrongelectromagicinterference

4、.Itisdifficultfcommonelectronicsensstomeasurethesignaltransmittedinsuchfmsascurrentvoltageresistance.Sotheresearchintheswitchcontacttemperaturefielddetectionisofgreatsignificanceintheunderstingofburningarcmechanismtheana

5、lysisofarcacteristicstheimprovementofelectricalproductsdesigntheimprovementofproductreliability.Onbasedtheanalysisoffiberrastersenssemployedintemperaturemeasurementswitchingarcvisualsimulationweproposedtheprojectusingfib

6、errastersensstomonittemperaturefalowvoltageelectricalcontact.WemadeqclosestudyofthewavelengthdemodulationofthefiberrastersenssputfwardafiberrastersenssdemodulationprojectadoptingFPtunerbasingonDSPtechnologywasproposed.On

7、thebasisofthetemperaturesensitivityanalysisofbarefiberrastersensthecomparisonoftemperatureenhancementtechnologyinfiberrastersensthepackageapproachtofiberrastersensadoptingglassfiberwasproposed.Alsowecameupwithtestingproj

8、ectusingthissenstomonitthetemperatureofelectricalcontactdesignedtheinstallationofthesensinlowvoltagecircuitbreakerswasdesignedwhichensuredthereasonablesolutiontotemperaturestraincrosssensitiveissuesachievedthecrectmeasur

9、ementofthecontacttemperature.ThereflectionwavelengthdemodulatbasedonDSPtechnologywasdesignedffiberrastersenss.DSPprocessssuchasADSPBF53123whichwereproducedbyU.S.ADcompanywereusedasacontrollerdemodulat.TheDSPhardwarecircu

10、itsinthesystem:resetcircuitclockcircuitdigitaltoanalogcircuittheexternalprogrammemycircuitsplasticcomparisoncircuitwererespectivelydesigned.Theimplementationofthehardwarewaspresentedindetail.Baseontheanalysisoflowvoltage

11、circuitbreakersinmagicflowfieldnumericalheattransferconvectionthediffusionequationsetwecloselyexaminedthearcchutetemperaturefieldoflowvoltagecircuitbreakers.Therewerearchotairinthearcchute.Theprocessesfthearcchutewerethe

12、rmalconductionthermalconvectionthetwoprocessesvariedtothechangesofcontactonoff.Actuallythisisaproblemofcouplinginthetemperaturefieldofalowvoltagecircuitbreakers.Asimplifiedmethodisusedherenamelytheonoffprocessofthecontac