《电力系统继电保护及应用》课件-4. Microcomputer protection software principle

Microcomputerprotectionsoftware

principleCONTENTSPAGEMicrocomputerprotectionsoftwarecomposition0102Microcomputerprotectionsoftwaremainprogram03SamplingInterruptServiceRoutineMicrocomputerprotectionsoftwarecomposition01MicrocomputerprotectionsoftwarecompositionThedifferencebetweenmicrocomputerprotectionandtraditionalprotectionistheincreaseofprotectionsoftware,anddifferentprotectionfunctionscanberealizedbydifferentprotectionalgorithms.Thesoftwareofthemicrocomputerprotectiondevicecanusuallybedividedintotwoparts:monitoringprogramandrunningprogram.Theso-calledmonitoringprogramincludesthehuman-machinedialogueinterfacecommandhandlerandtheprogramsconfiguredfortheplug-indebugging,fixedvaluecorrection,reportdisplay,etc.Arunningprogramisaprogramrequiredtoperformbytheprotectiondeviceintherunningstate.MicrocomputerprotectionsoftwarecompositionMicrocomputerprotectionoperationprogramsoftwarecangenerallybedividedintotwomodules:(1)Mainprocedure:includinginitialization,comprehensiveself-inspection,openingandwaitinginterruption(2)Interruptionserviceprogram:usuallysamplinginterruption,serialportinterruption,etc.Theformerincludesdataacquisitionandprocessing,protectionstartdetermination,etc.;thelattercompletesthedatatransmissionbetweentheprotectionCPUandtheprotectionmanagementCPU,suchastheprotectedremoteconsolidation,reset,proofreadingtimeoruploadingofprotectionactioninformation.Thefaulthandlersubmoduleisincludedinthesamplinginterruptserviceprogram.Itisonlyinvestedaftertheprotectionstart,usedtoconducttheprotectioncharacteristicscalculation,determinethefaultnature,etc.Microcomputerprotectionsoftwaremainprogram02Microcomputerprotectionsoftware

mainprogramAfterelectrizingtheprotectiondeviceorpressingtheresetbutton,entertheprogramentranceabovethemainprogramboxdiagraminFIG.1,andfirstperformthenecessaryinitialization[initialization(1)],suchasthestackregisterassignment,theinitializationofthecontrolport.TheCPUthenstartsthevariouspreparationsrequiredtorunstate[initialization(II)].Thefirstistopositiontheparallelcontrolport,andalltherelaysareinthenormalstate.Then,selecttherequiredsetsetthattheusersavesinEEPROMandputittothespecifiedsetvalueRAMzone.Afterthefixedvalueisprepared,theCPUwillconductacomprehensiveself-inspectionofallpartsofthedeviceandallowthedatacollectionsystemtoworkaftereverythingisgood.Microcomputerprotectionsoftware

mainprogramAftertheinitializationofthesamplingsystem,theopensamplingtimerinterruptandtheserialportinterrupt,andtheinterruptionistransferredtotheinterruptserviceprogram.Iftheinterruptiontimeisnotarrived,enterthecircularself-inspectionstate,andconstantlycycletheself-inspectionofgeneralself-inspectionandspecialself-inspectionitems.Ifactionorself-inspectionerrorreportsareprotected,sendareporttothemanagementCPU.Thecomprehensiveself-inspectioncontentincludestheRAMareareadandwritecheck,theEPROMprogramandtheEEPROMfixedvaluesumchecktheopenvolumeloopcheck,etc.Generalself-inspectionincludesthemonitoringoffixedvaluesetsandopenamountmonitoring,etc.Specialself-inspectionitemsshallbesetaccordingtodifferentprotectedelementsordifferentprotectionprinciples,suchasthestaticandstabilitydeterminationofultra-highvoltagelineprotection.Microcomputerprotectionsoftware

mainprogramSamplinginterruptserviceRoutine03SamplinginterruptserviceroutineThe