電力大系統(tǒng)保證靜態(tài)電壓穩(wěn)定的安全運行區(qū)域及其可視化.pdf

1、天津大學(xué)碩士學(xué)位論文電力大系統(tǒng)保證靜態(tài)電壓穩(wěn)定的安全運行區(qū)域及其可視化姓名：宿吉鋒申請學(xué)位級別：碩士專業(yè)：電力系統(tǒng)及其自動化指導(dǎo)教師：余貽鑫20021201天津大學(xué)壩l。學(xué)位論迎ABSTRACTThetraditionalapproachesforpowersystemsecurityanalysisiS“point—wise”approacheswhichcallgivefeWinformationaboutsecurityasses

2、smentandcontroIbyanalyzingpointsinparameterspaceorinjectionspaceonebyoneInrecentyears，theSO—called“region—wise”approachhasbeenproposedandisgraduallybeingacceptedbytheelectricalpowerengineersAsanewmethodology，itcangiveope

3、ratorstheglobalindexofsystemstabilityandsecufitystatusInthisthesisthesecurityoperationregionofpowersystembasedonstaticvoltagestabilityrestrictionissystematicallyandthoroughlystudied，andsomeconclusionsarederivedasfollows：

4、First，asecurityoperationregionofpowersystembasedonstaticvoltagestabilityrestrictioniSproposedTheStaticVoltageSecurityRegioninthisthesisiSdefinedasthesecurityoperationregionbasedonpowerflowandsmalldisturbancestabilityrest

5、rictionscausedbysaddle—nodebifurcationByusingContinuousPowerFlow(CPF)approach，therestrictionofpowerflowcallalSObesatisfiedatthesametimewhenthevoltagestabilityproblemisdiscussedSecond，thestaticvoltagesecurityregionsofpowe

6、rsysteminpowerinjectionspaceandcriticalcutsetspacearesystematicallyandthoroughlystudiedasfollows：1)ByapplyingforwardBPArtificialNeuralNetwork(ANN)，acriticalinjectionindexTCanbegivenTeducethedimensionofSVSRandtovisualizei

7、tanimprovedvoltagestabilityindexL，iSemployedforfindingtheweaknodesetItiSpossibletOgetthisregionfordifferentconfigurationsbyusingoneANNandsettingdifferentvaluesofcriticalinjectionindexTDuetoitSadvantageonspeeditiSpossible

8、tOusethismethodinrealtimesecuritymonitoringandcontr0121ByusingLeastSquareMethod(LSMlithasbeenfoundthattheboundaryoftheSVSRincriticalcutsetspacecouldbeapproximatedbyahyperplaneundergivenaloadlevelincreasemodeandageneratio

9、ndispatchmodeandchanginginitialoperationpoint，orgivenaninitialoperationpointandchangingloadlevelincreasemodeCombinedwitllthetherrnallimithyperplanesofthebranchesofthecriticalcutsetanintegratedfeasibleregioncanbeobtainedA

10、11theresultsofvisualizationCanbeusedinsystemmonitoringandcontrolandhavebeenValidatedinrealbulkpowersystemsFinallyasoftwarepackageforsystemsecurityreal—timemonitodngandcontrolonUNIXplatfornlaccordingtovisualizationofSVSRi