基于可調諧光源的光纖光柵溫度監(jiān)測系統(tǒng)在電網上的應用.pdf

1、中國科學技術大學碩士學位論文基于可調諧光源的光纖光柵溫度監(jiān)測系統(tǒng)在電網上的應用姓名：萬賢杰申請學位級別：碩士專業(yè)：微電子學與固體電子學指導教師：易波201105IIABSTRACTFireoftheelectricitygridismainlycausedbyoverheatingofthekeycomponents(suchascableconnectsetc.)ofthegrid.Inthehighvoltagesubstation

2、softhemaintransfmersubstationrealtimemonitingthetemperatureofsubswitchcapacitotheraspectsofthegridcangreatlyenhancethesecurityofthegrid.Fireoftheelectricitygridusuallyoccursatthehighvoltagepowergridhigherthan6KVbutconven

3、tionaltemperaturesensscannotwkathighvoltage.FBGtemperaturesenscomparedwiththeconventionalsensshavemanyadvantagessuchashighsensitivitysmallsizecrosionantielectromagicinterferenceopticalflexibleeasytoimplementquasidistribu

4、tedsensingsoitissuitablefmonitingthetemperatureofthehighvoltagepowergrid.ThispaperdetailinvestigatesthephotosensitiveoftheopticalfiberthewritingmethodsfopticalfibergratingthewaveguidestructuresoffiberBragggratingtherefle

5、ctivepropertiesoffibergratingderivedfromthecoupledmodetheythestraintemperaturesensitivityoffibergratingthereliablelifethedemodulationthewksmultiplexingofFBG.Onthisbasisaquasidistributedfiberbragggratingtemperaturemonitin

6、gsystemwhichcanbeusedinelectricitygridisdesigned.GaussapodizationfiberBragggratingisusedasthetemperaturesensofthesystemthereflectivepropertiesofthissenswithagoodcombinationofadataacquisitioncardareusedtodetectthelargestl

7、aserpowerwhichisofthereturnedtunablelaserfromthefiberbragggrating.Similartothe“zerocrossing“thismeasurementmethodbasedonbrillouinscatteringhasaveryhighaccuracy.Thequasidistributedtemperaturemeasurementofthefiberiseasytoa

8、chievefthenaturallycompatibilitybetweenthefibergrating.48gaussapodizationfiberbragggratingsasmonitingpointsareinstalledinthe16channelssinglemodefibersthelengthofwhichis100m.Therealtimetemperaturemonitingisachivedfeachmon