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1、ResearchonIntelligenton-lineInsulationMonitoringDeviceofShip，sACPowerGridCHENGXiang-xin：MaritimeCollegeofShanDongJiaotongUniversityWeihai,China：chengxiangxin@sohu.comWUShuo：MaritimeCollegeofShanDongJiaotongUniversityWeihai,Chinawushuo84@163.comABSTRACT——Thein
2、sulationmonitoringofshippowersystemisanimportantmeasuretoremovefaultsandhiddentroubles.Itsconditionconcernsthesecurityofpowersystemandoperationsafetyofships.Conventionalshippowersysteminsulationmonitoringishardtoaccuratelymonitortheinsulationresistancedecreas
3、ingorpreciselylocatethegroundingbranch.Ittakesmuchtimeandenergytoruleouttheinsulationfailure.Thispaperintroducestheintelligenton-lineinsulationmonitoringdevice.Basedonzero-sequencecurrentdetectingmethod,dual-frequencyinjectionmethodandSCMcontrol,itcanaccurate
4、lyandefficientlymonitortheshippowergridandguaranteetheoperationsafetyofships.Keywords-Shippowergrid;Shortcircuit;Insulationresistance;InsulationmonitoringIINTRODUCTIONWiththedevelopmentofshipbuildingtechnologyandtheincreasingtonnageofship,themodernshippowersy
5、stemcapacityhasbeencontinuallygrowing.Accordingly,itsdistributionnetworkstructurehasbecomemorecomplexandthepowergridshavebecomemorecomplexandintensive.Undertheharshconditionofhightemperature,vibration,shock,oil,mist,humidity,saltspray,fungus[1],theshippowergr
6、idhasbroughtalotofinfluencestotheshipselectricalinsulationproperties,whichresultsinhighincidenceofpowersysteminsulationfailure,thusfrequentlyleadstoterribleaccidents,asminoraselectricalequipmentmalfunctionordamage,asmajorasfire,collisionandsinkingdisaste匚Limi
7、tedbytechnicalmeans,ithasbeendifficulttomonitorthestateofcomplexbranchinsulation.Oncethemonitorfailurehappens,thereisnootherwaytofindoutinsulationfailurepointsexceptmanualoperation,whichnotonlyaffectsoperationbysupplyinterruptions,butalsohurtscrewphysicalandm
8、entalhealthbecauseofhighlaborintensity.Thus,theship'spowersysteminsulationreal-timemonitoringhastheextremelyvitalsignificancetothesecurityandcontinuityofpowersupplysystem.IIBRIEFINTRODUCT
