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1、華北電力人學(xué)碩十學(xué)位論文摘要摘要本文首先詳述了傳統(tǒng)串級(jí)調(diào)速系統(tǒng)的工作原理,分析了傳統(tǒng)串級(jí)調(diào)速系統(tǒng)功率因數(shù)低的原因,并利用MATLAB/SIMULINK搭建了傳統(tǒng)串級(jí)調(diào)速系統(tǒng)的仿真模型,得到系統(tǒng)功率因數(shù)隨觸發(fā)角變化的曲線;其次,介紹了斬波式串級(jí)調(diào)速系統(tǒng)的工作原理,提出斬波式串級(jí)調(diào)速系統(tǒng)功率因數(shù)分析計(jì)算的基本方法,并且利用MATLAB/SIMUUNK搭建的斬波式串級(jí)調(diào)速系統(tǒng)仿真模型對(duì)該計(jì)算方法的計(jì)算結(jié)果進(jìn)行了驗(yàn)證;然后分析了影響斬波式串級(jí)調(diào)速系統(tǒng)功率因數(shù)的因素;最后,用并聯(lián)電容器的方式對(duì)斬波式串級(jí)調(diào)速系統(tǒng)進(jìn)行無功功率補(bǔ)償。仿真結(jié)果表明,
2、利用無功補(bǔ)償方法能有效提高斬波式串級(jí)調(diào)速系統(tǒng)的功率因數(shù)。關(guān)鍵詞:串級(jí)調(diào)速系統(tǒng),功率因數(shù),斬波控制,仿真ABSTRACTFirstly,theprincipleoftraditionalcascadespeedcOntrolsystemispresentedinthepaper’andpowerfactorofthesystemareanalyzed.TbesjmulationcircuitoftfaditionalcascadespeedcontrolsystemisbuiltupbyusingMATLAB/SIMULINKandt
3、herelationshipbetweenpowerfactorandthefireangleisobtained.AndthentheprincipleOfchoppercascadespeedcOntrolsystemisintroduced.ThebasiccalculatiOnmethods0fpOwerfactorfbrchOppercascadespeedcontrolsystemareestablished,andusingsimulationcircuitOfchoppercascadespeedcontrolsys
4、temValidatestheresultofcalculation.ThenthefactorswhichaffectthepowerfactorofchoppercascadespeedcOntrOlsystemareanalyzed.LastlythesystemiscOmpensatedbyusingparaIlelcOnnectioncapacitance,andsimulatingresultshOwsthatthepowerfActorcanbeimproVedbyusingthemethodofcompensatio
5、nreactiVepower.ZhenYa(ControlTheoryandControlEngineering)DirectedbyProf.、VangBingshuKEYWoRDS:cascadespeedcontrolsystem,powerfactor,choppingcontroI,simulation華北電力人學(xué)碩十學(xué)位論文摘要摘要本文首先詳述了傳統(tǒng)串級(jí)調(diào)速系統(tǒng)的工作原理,分析了傳統(tǒng)串級(jí)調(diào)速系統(tǒng)功率因數(shù)低的原因,并利用MATLAB/SIMULINK搭建了傳統(tǒng)串級(jí)調(diào)速系統(tǒng)的仿真模型,得到系統(tǒng)功率因數(shù)隨觸發(fā)角變化的曲線;其次
6、,介紹了斬波式串級(jí)調(diào)速系統(tǒng)的工作原理,提出斬波式串級(jí)調(diào)速系統(tǒng)功率因數(shù)分析計(jì)算的基本方法,并且利用MATLAB/SIMUUNK搭建的斬波式串級(jí)調(diào)速系統(tǒng)仿真模型對(duì)該計(jì)算方法的計(jì)算結(jié)果進(jìn)行了驗(yàn)證;然后分析了影響斬波式串級(jí)調(diào)速系統(tǒng)功率因數(shù)的因素;最后,用并聯(lián)電容器的方式對(duì)斬波式串級(jí)調(diào)速系統(tǒng)進(jìn)行無功功率補(bǔ)償。仿真結(jié)果表明,利用無功補(bǔ)償方法能有效提高斬波式串級(jí)調(diào)速系統(tǒng)的功率因數(shù)。關(guān)鍵詞:串級(jí)調(diào)速系統(tǒng),功率因數(shù),斬波控制,仿真ABSTRACTFirstly,theprincipleoftraditionalcascadespeedcOntrols
7、ystemispresentedinthepaper’andpowerfactorofthesystemareanalyzed.TbesjmulationcircuitoftfaditionalcascadespeedcontrolsystemisbuiltupbyusingMATLAB/SIMULINKandtherelationshipbetweenpowerfactorandthefireangleisobtained.AndthentheprincipleOfchoppercascadespeedcOntrolsystemi
8、sintroduced.ThebasiccalculatiOnmethods0fpOwerfactorfbrchOppercascadespeedcontrolsystemareestablished,andusingsimulati