基于hht的微网电能质量检测与分析

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1、AbstractAbstractWiththecontinuousdevelopmentofscienceandglobalindustrialization,moreandmorepeopleareconcernedaboutpowerquality.Inordertopromoteenergyproduction,supportsustainableandhealthydevelopmentofcarbonindustriesandnewenergy,weshouldvigorouslypromot

2、ethenewmodelthatcombinesthedistributedgenerationandsmartgrid.Itrequiresthatsmartgridiscompatiblewithdistributedgenerationandenergystorage.Microgridtechnologyprovidestechnicalsupportforthecombinationbetweendistributedgenerationandsmartgrid.Therefore,there

3、searchcarriesoutpracticalsignificanceandmeetstoday'sgridtrends.Inmicrogrid,duetotheexistanceofdistributedgeneration,nonlinearloadandvarioususeofelectricalandelectronicequipment,powerqualityproblemsinmicrogridismorecomplexandprominent.Thepowerqualityprobl

4、eminmicrogridcanbesolvedbytheCustomPowertechnology.Inordertogovernthecomplexpowerqualityproblemseffectively,itisanurgentneedforanaccuratepowerqualitydisturbancedetectionmethod.Therefore,thestudyofpowerqualitydetectionmethodinmicrogridisofgreatimportance.

5、Thispaperfirstlyanalysisthecausesandhazardsofpowerqualityquestionsinmicrogrid.Thenaccordingtothecharacteristicsofpowerqualityinmicrogrid,thispaperleadstoHilbert-Huangtransform.Secondly,basedonthein-depthanalysisoftheempiricalmodedecompositionmethod,explo

6、rethecausesandsolutionsofendeffectandmodemixing.InordertosolvetheproblemofendeffectofEMD,thispaperuseadaptivewaveformmatchingextensionmethod.InordertosolvetheproblemofmodemixingofEMD,thispaperuseassistedhigh-frequencyharmonicstopretreattheoriginalsignala

7、ndgivestheempiricalformulaofhighfrequencyharmonics.Moreover,usetheimprovedHHTmethodtodetectthepowerqualitydisturbanceinmicrogrid.Thecorrectnessandeffectivenessofthemethodhavebeenverifiedthroughsimulation.Keywords:microgrid；improvedHHT；endeffect；modemixin

8、g；powerqualityII目录目录摘要.......................................................................................................................IAbstract........................................................................