基于AVR單片機(jī)的配電變壓器保護(hù)裝置研制.pdf

1、廣西大學(xué)碩士學(xué)位論文基于AVR單片機(jī)的配電變壓器保護(hù)裝置研制姓名：羅曉芬申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電力系統(tǒng)及其自動(dòng)化指導(dǎo)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