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ID:32319374
大小:3.13 MB
页数:44页
时间:2019-02-03
《三相四线制有源电力滤波器控制算法的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、三相四线制有源电力滤波器控制算法的研究摘要谐波和无功功率的存在不仅降低了供电设备的供电效率,而且大量的谐波还会危害公共电网的安全,干扰临近用电设备的正常运行,有源电力滤波器是补偿谐波和无功功率的有效方法。本文基于三相四线制系统,对有源电力滤波器的控制算法进行研究。本文的主要内容如下:1.介绍了有源电力滤波器的发展现状、分类、拓扑结构及特点,并分析了并联型有源电力滤波器的基本工作原理。2.探讨了三相四线制系统并联有源滤波器主电路的拓扑结构,分析其数学模型,并对主电路参数以及直流侧电容电压的控制方法进行了探讨。3.对有源电力滤波器控制算法进行了研究,讨论了滞环PWM脉宽调制、三角波P
2、WM脉宽调制和三维空间矢量调制,比较了三者的优缺点。利用MATLAB6.5/simulink对三角波脉宽调制技术和三维空间矢量脉宽调制技术进行了建模,并对不对称系统和对称系统两种情况分别进行了仿真研究,并对结果进行了分析和对比,结果表明,在三相四线对称系统和不对称系统下,三维空间矢量脉宽调制技术比三角波脉宽调制技术精度都有所提高。关键词:三相四线制,谐波,无功功率,有源电力滤波器,三维空间矢量ResearchonControlMethodofActivePowerFilterBasedonThree-·PhaseFour—-WireSystemABSTRACTTheexisten
3、ceofharmonicandreactivepowernotonlyreducestheefficiencyofelectricitysupplyequipment,butalsoendangerthesafetyofthepublicpowermeshworkandinterruptthenormaloperationofthenearbyequipment.TheActivePowerFilter(APF)isaneffectivewaytocompensateharmonicsandreactivepower.Basedonthree-phasefour-wiredsys
4、tem,thispaperresearchthecontrolmethodoftheactivepowerfilter.Themaincontentsofthispaperareasfollows:1,Thestatusofthedevelopmentandthesortsofactivepowerfilter.anditstopologyandcharacteristicsareintroduced.Thebasicworkingprincipleofparallelactivepowerfilterisanalyzedalso.2,Thispaperdiscussthemai
5、ncircuittopologyoftheparallelactivefiltersystemonthree-phasefour—wiresystem,analysisitsmathematicalmodel,andprobeintothemaincircuitparametersandcapacitorvoltagecontrolmethodofDC—sidealso.3,Thecontrolmethodofactivepowerfilterisstudied.TheadvantagesanddisadvantagesofhysteresisPulseWidthModulati
6、on(PWM),triangularwavePWMandthree-dimensionalspacevectorPWMtechnologyarecompared.Thesimulationmodelofthetriangle-wavePWMandthree..dimensionalspacevectorPWMtechnologyarecarriedoutbyMATLAB6.5/Simulink.Thesymmetricandasymmetriccasesofthesystemaresimulatedseparately.Theresultsshowthattheaccuracyo
7、fthree-dimensionalspacevectorPWMtechniqueiSbetterthantriangle—wavePWMtechniqueinthesymmetrical&asymmetricalthree—phasefour—wiresystem.Keywords:three—phasefour-wiresystem,harmonics,reactivepower,activepowerfilter,three—dimensionalspacevector插图
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