電力系統(tǒng)小擾動穩(wěn)定約束下的平衡解與最優(yōu)潮流研究.pdf

1、長沙理工大學(xué)碩士學(xué)位論文電力系統(tǒng)小擾動穩(wěn)定約束下的平衡解與最優(yōu)潮流研究姓名：鄧學(xué)華申請學(xué)位級別：碩士專業(yè)：電力系統(tǒng)及其自動化指導(dǎo)教師：周任軍20080415ABSTRACTHowtoestablisharationalmodelandthenumericalalgorithm，andthendirectobtainoperatingpointsforsmallsignalstabilityinmultimachinepowersyste

2、m，isworthyofindepthstudyonpowersystemstabilityanalysisAfterreviewingresearchachievementsaboutsmallsignalstabilityofthepowersystem，inthispaperusingprecisemathematicaltheories，onthebasisofestablishingsmallsignalstabilityco

3、nstraints，theconceptandformulationofstableequilibriumsolutionmodelarcpresentedefficientalgorithmforthemodelisdesigned，andoptimalpowerflowwithconsideringsmallsignalstabilityconstraintsispreliminaryresearchedTealizestableo

4、perationofthepowersystemundersmalldisturbance，basedonthesmallsignalstabilityregiontheories，conceptofstabilityfunctionispresented，andmathematicalmodelofsmallsignalstabilityconstraintisestabilished。Aimingatseveraltypicalun

5、stableequilibriumpoints，correspondingdifferentstabilityconstraintsareexpressedThedistancebetweenoperatingpointandboundaryofstabilityregioncanbesetbyregulatingparameterinstabilityconstraint。Smallsignalstabilityconstraints

6、arealgebrainequalitiesofstatmatrixorJacobianmatrix，inordertoavoidthedifficultyofcalculatingeigenvaluesofnon—symmetricmatrix，matrixtheoriesandspectralfunctionpropertiesareappliedtoconvertstabilityconstraintsintosemismooth

7、inequalitiesCombiningsmallsignalstabilityconstraintwiththeelassicalbalanceequationsofpowersystemstableequilibriumsolutionmodelwouldbeestablished，inwhichunstablepointsareexcludedoutofstabilityregionbystabilityconstraints。

8、Throughtransformingthemodelintobeingsmoothusingsmoothingfunctions，numericalalgorithmforthemodelisdiscussed，SOthatstableequilibriumsolutionwouldbedirectsolvedoutMakinguseofthesmallsignalstabilityconstraints，whichareconver

9、tedintosmoothinequalities，fixedstabilitymarginoptimalpowerflowmodelwithconsideringsmallsignalstabilityconstraintsisestablishedAftersolvingtheoptimalpowerflowmodel，anoperatingpointwouldbedirectobtainedtosatisfyfixedstabil

10、itymarginandmaximumeconomicalThroughcompilingprogramusingMATLAB，thestableequilibriumsolutionandoptimalpowerflowmodelwithsmallsignalstabilityconstraintandthealgorithmareachieved，SOthatthefeasibilityofproposedmodelandalgor