电力系统的谐波分析算法及负荷谐波建模

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1、北京交通大学硕士学位论文电力系统的谐波分析算法及负荷谐波建模姓名：任志莲申请学位级别：硕士专业：电力系统及其自动化指导教师：周晖20090601ABSTRACTABSTRACTWiththedevelopmentofpowerelectromicstechnique，moreandmorethedevice，suchasrectifier，frequencyconverter，electricarcfumaceandSOonareappliedintopowersystem，asthissortofloadisno

2、nlinear，impulsive，unbalanced，thepowerqualitybecomsworsethanbefore，whichendangersthesafety，stabilityofpowersystemanddecreasestheeconomyofoperation．Ontheotherhand，thedeviceusedinmodernindustry，commenceandpeople’Sdailylife，iseasilyinfluencedbypowerquality，therefo

3、re，theissueofimprovingpowerqualityisconcernedbyallofUS．Howtominimizethedamageoftheharmonicsisanissueofgreatcongerlltothefieldofpowersystems．Thekeytosolutionofthisissueliesinthequantitativedeterminationofthecomposition，magnitudeandphasesofharmoniouswaves．Nonhar

4、monichasbecomethemainsymbolofgreen，thecontentofharmonicinpowersystemistheimportantparameterinpowerquality，SOharmonicanalysisisimportantsignificanceinpowersystem．Thepowerloadisanimportantconstituentoftheelectricalpowersystem，anditsmodelingworkhasalwaysbeingadif

5、ficultproblemofthepowersystem，acquiringthedomesticandforeignscholars’widespreadattation．Accuratepowermodelissignificantinthepowersystemharmonicanalysisandcalculation，therebyfurtheraffectsthepowersystemmonitoring，managementandgovemance．Harmonicanalysishashigher

6、precisiononthecomponentsofthemodelthanthepowerflow．Comparedwimgenerators，transformersandtransmissionlinemodelingoftheharmonic，theslowprogressinharmonicmodelingofelectricloads，andtheroughharmonicmodelingofelectricloadshinderedtheaccuracyoftheentirepowersystemsi

7、mulation．Therefore，thepreciseharmonicmodelingofelectricloadsisofgreatsignificance．Firstly,thepapersystemicandbriefintroducestheconceptofharmonic，hazardofharmonic，harmonicsource，existedproblemofthetraditionalandnewharmonicanalysisalgorithmswhichareusedfrequentl

8、y．IntheviewoftheseveralproblemsofdifferentalgorithmssuchasthelowcomputationaccuracyandthebigcomputationquantityandSOon，allartificialnetworkbasedonadaptiveNeural—NetworkbasedFuzzyIn