Maximum power point tracking of a dfig wind turbine system
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Maximum power point tracking of a dfig wind turbine system
DissertationMaximum Power Point Tracking of aDFIG Wind Turbine SystemGraduate School ofNatural Science & TechnologyKanazawa UniversityDivision ofElect Maximum power point tracking of a dfig wind turbine system trical and Computer EngineeringStudent ID No.:1424042007Name:Phan Dinh ChungChief advisor:Prof. Shigeru YAMAMOTODate of Submission: January 6. 2017AbstractDoubly-fed induction generator (DFTG) has been used popularly in variable speed wind turbines because the Dl'lG wind turbine uses a small back-to Maximum power point tracking of a dfig wind turbine system -back converter to interface to the connected grid, about 30% comparing to the wind turbine's capacity, and provides a control ability as good as a vaMaximum power point tracking of a dfig wind turbine system
riable speed wind turbine using a generator with a lull converter. The most important purpose of a variable speed wind turbine or a DFIG wind turbine,DissertationMaximum Power Point Tracking of aDFIG Wind Turbine SystemGraduate School ofNatural Science & TechnologyKanazawa UniversityDivision ofElect Maximum power point tracking of a dfig wind turbine system ethods. Generally, the previously proposed schemes can be listed into two groups including wind speed-based method and wind speed sensorless one. With the first group, the wind turbine can give a good performance in tracking maximum power point but it requires a precise and instantaneous wind speed Maximum power point tracking of a dfig wind turbine system measurement; this requirement hardly achieve in practice. With methods in the second group, an anemometer does not require but the wind turbine usingMaximum power point tracking of a dfig wind turbine system
these methods cannot track maximum power point efficiently under varying wind conditions.In this dissertation. I proposed two methods and control law DissertationMaximum Power Point Tracking of aDFIG Wind Turbine SystemGraduate School ofNatural Science & TechnologyKanazawa UniversityDivision ofElect Maximum power point tracking of a dfig wind turbine system method while the second one is based on an adaptive MPPT method. Both methods do not require any information of wind data or wind sensor. Comparing to the first scheme, the second method docs not require the precise parameters of the wind turbine. The maximum power point tracking (MPPT) ability of t Maximum power point tracking of a dfig wind turbine system hese proposed methods are theoretically proven under some certain assumptions. In particular. DF1G stale-space models arc derived and control techniquMaximum power point tracking of a dfig wind turbine system
es based on the Lyapunov function arc adopted toderive the control methods corresponding to (he proposed maximum power point tracking schemes. The quaDissertationMaximum Power Point Tracking of aDFIG Wind Turbine SystemGraduate School ofNatural Science & TechnologyKanazawa UniversityDivision ofElect Maximum power point tracking of a dfig wind turbine system imulation results show that the wind turbine implemented with the proposed maximum power point tracking methods and control laws can track the optimal operation point more properly comparing to the wind turbine using the conventional MPPT-curve method. The power coefficient of the wind turbine using Maximum power point tracking of a dfig wind turbine system the proposed methods can retain its maximum value promptly under a drammaclical change in wind velocity while this cannot achieve in the wind turbineMaximum power point tracking of a dfig wind turbine system
using the conventional MPPT-curve. Furthermore, the energy output of the DFIG wind turbine using the proposed methods is higher compared to the conveDissertationMaximum Power Point Tracking of aDFIG Wind Turbine SystemGraduate School ofNatural Science & TechnologyKanazawa UniversityDivision ofElect Maximum power point tracking of a dfig wind turbine system DFIG Wind Turbine System DF1GX ểpẴ (Division) :Electrical and computer engineering—fis&rrr (Student ID Number) : 1424042007ft % (Name) : Phan Dinh Chung(Chief supervisor) : YAMAMOTO Shigeru(Dissertation Summary)Doubly-fed. induction .generator (DFIG). has been. used, popularly, .in variable speed wi Maximum power point tracking of a dfig wind turbine system nd. turbines. because, the DFIG. wind.turbine.uses a small.back-to-back.converter to interface, to the. connected grid, about .30% comparing to..the .Maximum power point tracking of a dfig wind turbine system
wind turbine's. capacity,. and. provides a control ability. as good.as. a. variable speed, wind, turbine using, a generator. wit h. a. fall. converterDissertationMaximum Power Point Tracking of aDFIG Wind Turbine SystemGraduate School ofNatural Science & TechnologyKanazawa UniversityDivision ofElect Maximum power point tracking of a dfig wind turbine system .fox..electric.,generation. To meet this objective...several publications.provided different,.methods,. Generally,. the.previously.proposed. schemes..can..be..listed, into. two grpups..such.aswiAd..?peed-basedm.ethQdand.>ymd.SPfied.s.en5Priess..0ner.>YithJhe.tirst.gr.0.up,.the.wmd.ru.rt>me c an -giv Maximum power point tracking of a dfig wind turbine system eạ pood. performance in .tracking, maximu m. power. poi nt. but. it. requires a..precise.and.instantaneous.wind speed.,measurement; this requirement hMaximum power point tracking of a dfig wind turbine system
ardly..achieve,ip..practice With methods m.Ahe...second .group,...an anemomet er ..does. not. requ ire. but. the. wind.. turbine. usi ng. these methodDissertationMaximum Power Point Tracking of aDFIG Wind Turbine SystemGraduate School ofNatural Science & TechnologyKanazawa UniversityDivision ofElect Maximum power point tracking of a dfig wind turbine system ws..fo.r...obta.inmg..max.inwm..ene.rgy.putput..pf Poub.lỵTÍed.induction generator..wind..rnrhine,.The.first.meAhod..aims.AO.improve.Jte.eonyentional.MEET..WM .method[.while, .the ..second.one., is. based, on .an. adaptive ..MPPT..method,..Both methods, do. not. require.any information of wind data Maximum power point tracking of a dfig wind turbine system or. .wind, sensor, .Comparing, to. the. first .ssheme,. the .second .method, does. not. require, the prec.ise.parameters pf the wind turbine. TheymaxiMaximum power point tracking of a dfig wind turbine system
muni power pointtracking.lMPPT).ability; of.these.proposed methods, axe theoreucallv.proven under.some, certain assumptions- hl particular. DFIG stateDissertationMaximum Power Point Tracking of aDFIG Wind Turbine SystemGraduate School ofNatural Science & TechnologyKanazawa UniversityDivision ofElect Maximum power point tracking of a dfig wind turbine system ng to the.proposed maxmnim.power.point tracking schemes- The quality of the proposed methods .is verified, by. the numerical.simulation pfa.l,5:.MW DFIG wind.turbine .yyith.thediffe.rem.scenario of wind, velocity. The. Simulation, results, show. that, the w.md. turbine, implemented, with the propose Maximum power point tracking of a dfig wind turbine system d .maximum power point tracking .methods..and control.laws, can. track, the. optimal, operation.point, more.properly comparing, to.the..wind. turbineMaximum power point tracking of a dfig wind turbine system
using the. conventional MPPT-curye method.. The power coefficient of the wind, turbine using. the proposed methods can.retain its.maxmium.yalue prpmptDissertationMaximum Power Point Tracking of aDFIG Wind Turbine SystemGraduate School ofNatural Science & TechnologyKanazawa UniversityDivision ofElect Maximum power point tracking of a dfig wind turbine system f the DFIG wind.turbine.using the. proposed, methods..is. higher, compared, to .the conventional MPPT-curve.method, under .the same, conditions:.............................................................................................ContentsAbstractiContentsivList of FiguresVList of Tablesvii Maximum power point tracking of a dfig wind turbine system DissertationMaximum Power Point Tracking of aDFIG Wind Turbine SystemGraduate School ofNatural Science & TechnologyKanazawa UniversityDivision ofElectGọi ngay
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