基于AVR單片機的配電變壓器保護裝置研制.pdf

1、廣西大學碩士學位論文基于AVR單片機的配電變壓器保護裝置研制姓名：羅曉芬申請學位級別：碩士專業(yè)：電力系統(tǒng)及其自動化指導教師：李嘯驄20090626DESIGNOFDISTRIBUTIONTRANSFORMERPROTECTIONDEVICEBASEDONAVRSINGLECHIPAbstract量JowertransformerISveryimportantinpowersystem，oneofthemaindevicesthrough

2、whichtoconnectdifferentvoltagelevelsofpowergridforenergyexchangeAsahubforpowertransmission，theworkstateofpowertransformerhasimpactdlrectlYonthepowersystemsecurity，stabilityandreliabilityThereforeitisnecessarytoinstallago

3、odperformance，reliablerelayprotectiondeviceinaccordaricewiththecapacityandimportanceofthetransformerTraditionaltransIbrmerprotectiondevicescommonlyusedpluginDSPprocessingchipStructurecannotmeetthespeedandreal—timerequire

4、mentsInthispaperwedesignedapowerdistributiontransformerprotectiondevicesbasedAVRsingle—chip，inlightoftheactualresearchprojectFirst，thisarticleintroducesthetransformerrelayprotectiontechn0109y，then，analyzestheexistingprob

5、lemsofthehardwareanddevelopmentplatformfoilowedbYstudyofthecurrenttransformerprotectionprinciplecommonlyusedOnthebasiso士Tthestudy，wedesignedtheprotectiondevicewithATmega64microprocessorofATMELCorporationasthecoreProtecti

6、ondeviceinaccordancewiththeactuaIsituationofdistributiontransformerisequippedwithOffspeeddif先rentialprotection，theratiodifferentialprotectionwithsecondharmonicrestraintcompoundvoltagelockoutdirectionovercurrentprotection

7、，thezero—sequenceoVer‘currentprotection，overloadprotectionanddeviceselftestfunctionInaddition，thearticlealsoprovidesanin—depththeoreticalanalysisofseveralsPecmcprotectactionsprincipleSecondly，theoverallhardwaredesignands

8、ofiwaredesignareintroducedTheentirehardwaredeviceiscomposedofsixpartsoftheclrcultmodule，includingdataacquisitionandA／Dconversion，ATmega64switchlnPut／output，communicationsinterface，thekeyboarddisplayandpowerOntheasPectofh