炼钢厂电弧炉系统的谐波分析及治理措施仿真研究

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1、广西大学硕士学位论文炼钢厂电弧炉系统的谐波分析及治理措施仿真研究姓名：张帆申请学位级别：硕士专业：电力系统及其自动化指导教师：林苗20090626SIMULATIONSONHARMONICANALYSISANDGOVERNANCEOFSTEELMILLARCFURNACESYSTEMABSTRACTlnrecentyears，ljorthearcfurnacesteel—makingtechnologyintheeconomicadvantagesofindustrialproduction，theuseofACarcfumacehasbeenincreasingonIndustri

2、alproduction．Itscapacityofasingle．phaseisbiggerandbigger·Theinterferenceofarcfurnacepowersupplysystemhasbecomeevenmoreprominent，andtherefore，itsharmoniccontroliSurgentneed．Iakingintoaccounttheinadequacyoftheexistingarcfurnacemodel，thepaperimprovesthemodelofarcfurnacesystemwhichcombinesconservat

3、ionofenergywithelectromagneticfieldtheory，andconsidersthechangeoftemperature、currentandtimechangesinACarccolumnlength．Thenthepaperproposesharmoniccontrolmeasuresoftypicalarcfurnacesystem．1"WOtypesofarCfurnacecontrolmeasuresareproposed：activemeasuresandpassivemeasures．Intheactivecontrolmeasures，

4、theuseofoptimizeddesignparametersofarcfurnaceandimprovedthesteel．makingprocessareproposedtoreducetheharmoniccontent；Inthepassivecontrolmeasures．theinstallationofpassivefilterandactivefilteronlinesforcompensatingsystemareproposed．AboutPF'thepaperfocusonasingle．tunedfilterandsecond_-orderhigh--pa

5、ssfilter,choosingtheirdesignparametersandstudyingtheirharmonicmagnification．AboutthedetectionsystemofAF．itfocus0nthemethodwhichbasedonthetime—domainanalysis：p-qmethod，ip．iqmethodand切)Fmethod，proposesimprovementsforinstantaneousreactivepowertheory．Then，itstudiesthesimulationandcomparisononip．iqm

6、ethodandUPFmethod．AboutthecontrolsystemofAF，theP印erstudiesonbothtriangularwavemodulationandcontr01ofhysteresiscomparisonmethod，thenanalyzesandtheadvantagesanddisadvantagesofeachsolution．Finally，thepapergivesharmonictreatmentstoaarcfurnacepowersupplyⅡsystemofsteelmillwiththeimprovedmodel，andbuil

7、dsthemodel，arcmodel，passivefilterandactivefiltermodelintheSimulinksimulationenvironment．Itanalyzestheharmoniccontentbeforeandaidercompensation，andcomparestheadvantagesanddisadvantagesoftwomethods．Theresultverifiesthetwokindsoffilt