基于FPGA的諧波檢測(cè).pdf

1、同濟(jì)大學(xué)電子與信息工程學(xué)院碩士學(xué)位論文基于FPGA的諧波檢測(cè)姓名：忻黎敏申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：控制理論與控制工程指導(dǎo)教師：許維勝20080301ABSTRACTThispaperfirstintroducesthereasoncharacteristics鋤dhannsofelectricsyst鋤harmonicsThenitanalyzesthestatusquoandtrendinthedevelopmentoftheharmo

2、nicdetectionThemethodbasedonfastFouriertransform(VET)anddetecltioneno璐孤eresearchedinthispaperThereasonoffrequencyspecmmlleakageandseveralmethodstocorrecterrorsareemphasizedToimprovetheproblemofoneperiodtimedelayandheavyc

3、alculationburd啪broughtbyF凡aswellasspectrumleakagecausedbyasynchronouss鋤pli略misp印erproposesareal。timeharmoniccurrentdetectionapproachbasedonre(船sivedis刪eFouriertransform(OFT)andsotlwaresynchronoussamplingTheproposcdapproa

4、chdynamicallyupdatesthefrequencyspectrumbyuseofrecursivewaytraceSpowersystemfrequencyvariationinreal—timemodeaccordingtophasecalculationresults，dynamicallyadjustssamplingfrequencyandimplementssvnc：hronoussamplingthuseffe

5、ctivelyrestraintstheimpactofpowersystemfrequencyfluctuationondetectionaccuracyBasedonsimulationexperimentstoVI。ri母theeffectivenessoftheproposeddetectionmethod，aharmonicdetectionsystemisthenanalyzedanddesi辨edThesystemisba

6、sedonFPGA(FieldProgrammableGateArray)whichalsocon打olsothermodules。operationasitscomputingcoreandcompletesthefunctionsofcurre：IltsamplingfilteringA／DconvertingandanalyzedresultsdisplayOnthebasisofadeepunderstandingofhardw

7、aredescriptionlanguageandFPGAdesignflow，theharmonicdetectionalgorithmisactualizedwithVerilogThispaperalsodiscussesthekeyproblemsoffix’pointdigitalformat，datastorageauldmathenlaticoperationofcomplexnumbersandanalyzesthefi

8、nalexperimentresultsAtlast，thispapersummarizesthedesign，introducesexistingproblemsandsuggeststhefutureworkcontentKeyWords：harmonicdetection，F(xiàn)PGA，frequencyspectrumleak，recursivediscreteFouriertransform，synchronoussampling