本科毕设论文-—基于matlab的有源电力滤波器的设计.doc

成都信息工程学院学位论文基于MATLAB的有源电力滤波器的设计基于matlab的有源电力滤波器的设计摘要随着电力电子装置日益广泛的应用，电力电子装置自身所具有的非线性导致了电网中含有大量谐波，这些谐波给电力系统带来了严重的污染，严重危害了用电设备和通信系统的稳定运行。虽然传统的无源电力滤波器具有结构简单、成本低、技术成熟、运行费用低等优点，但同时也有一些缺点，例如只能抑制固定的几次谐波，并对某次谐波在一定条件下会与电网阻抗产生谐振反而而使谐波放大。目前，谐波抑制的一个重要趋势是采用有源电力滤波器，有源电力滤波器也是一种电力电子装置，且相关技术的研究也日渐成为研究的热点。本文阐述了几种常见APF的拓扑结构及各自的优缺点，详细分析了基于瞬时无功功率理论的谐波检测方法，比例控制和前馈控制两种电流环控制策略以及SPWM和SVPWM两种调制策略。介绍了电力有源滤波器的基本原理和结构，并设计了并联型有源电力滤波器的控制系统。该系统包括指令电流运算、PWM控制和驱动电路模块。在matlab中建立了各个子模块的仿真模型和并联型有源电力滤波器的整体仿真模型。仿真结果表明,其谐波抑制和无功补偿可以达到良好的效果,在技术上是可行的。关键词：电力有源滤波器；谐波；谐波检测；matlab/simulink仿真DesignofActivePowerFilterBasedonMATLABAbstractWiththedevelopmentofpowerelectronicdevicetheincreasinglywidespreadapplicationofpowerelectronicdevice,whichhasresultedinanonlinearnetworkcontainsalargenumberofharmonics,theharmonicofpowersystemshasbroughtseriouspollution,seriousharmtotheelectricalequipmentandthestablerunningofthecommunicationsystem.althoughthetraditionalpassivepowerfilterhastheadvantagesofsimplestructure,lowcost,maturetechnology,lowrunningcosts,butitalsohassomedisadvantages,suchasonlytheinhibitionofstationaryharmonics,andaharmonicundercertainconditionsandthegridimpedanceresonanceinsteadoftheharmonicamplification.Currently,theharmonicsuppressionisanimportanttrendofactivepowerfilters,activepowerfilterisapowerelectronicdevices,andrelatedtechnologiesareincreasinglybecomeahottopic.ThispaperdescribesthetopologyandtheiradvantagesanddisadvantagesofseveralcommonAPF,adetailedanalysisoftheharmonicdetectionmethodbasedoninstantaneousreactivepowertheory,andproportionalcontrolandfeedforwardcontroloftwocurrent-loopcontrolstrategy,andbothSPWMandSVPWMmodulationstrategy.Introducedthebasicprinciplesandstructureoftheactivepowerfilter,anddesignofashuntactivepowerfiltercontrolsystem.Thesystemconsistsofthecommandcurrentoperation,PWMcontrolanddrivecircuitmodule.SimulationmodelofthevarioussubmodulesandparallelactivepowerfiltersimulationmodelinMATLAB.Thesimulationresultsshowthattheharmonicsuppressionandreactivepowercompensationtoachievegoodre