三相四线并联型有源电力滤波器的仿真及研究

本科生毕业论文1摘要随着电力电子装置大量的应用到生产生活当中，它们使电能的转换应用变得更加容易，但同时也给电力系统带来了严重的谐波污染。目前，并联有源电力滤波器(shuntactivepowerfilter，SAPF)已成为无功和谐波动态补偿的有效手段之一。在三相四线制电力系统中除了无功和谐波需要治理，负载不平衡问题也变得日益突出，因此，本文研究与设计适用于三相四线制下的SAPF来解决这些问题。针对三相四线制SAPF谐波电流检测问题，本文详细的推导基于瞬时无功理论的qpii算法，论证它无需改进即可直接应用到三相四线制系统里；选择了滞环比较法作为补偿电流的控制策略；采用了三桥臂变流器作为SAPF的主电路。文章的最后，利用MATLAB/Simulink软件，搭建了仿真平台，对主电路出线电感参数和软启动方案进行单独仿真分析，证明电感值参数选择的合理和软启动方案可行。对SAPF和所要补偿的系统进行了整体仿真，结果证明在所选参数下，能够对平衡和不平衡非线性负载所带来的谐波有很好的动态补偿效果，对不平衡负载有很好的平衡作用；进而也说明检测方法正确，控制策略得当。关键词谐波动态补偿；并联有源电力滤波器；三相四线制；qpii算法MATLAB/Simulink本科生毕业论文2AbstractWithextensiveapplicationofpowerelectronicdevicesinproductionandlife,theymakepowerenergyconversionandapplicationeasily,butalsoleadtotheseriousharmonicpollutioninthepowersystem.Atpresent,theshuntactivepowerfilter(SAPF)hasbeenaneffectivewaytodynamicallycompensatereactivepowerandharmonic.Inadditiontotheseproblems,theloadunbalanceismoreandmoreseriousinthree-phasefour-wiresystem,therefore,SAPFappliedtothree-phasefour-wiresystemisresearchedanddesignedtosolvetheseproblemsinthispaper.FortheharmoniccurrentdetectionofSAPFinthree-phasefour-wiresystem,theqpiialgorithmbasedontheinstantaneousreactivetheoryisdetailedlyderived,andthisalgorithmisdemonstrateditcouldbedirectlyappliedtothree-phaseandfour-wiresystemwithoutbeingimproved.Hysteresis-bandcomparisonmethodischosenascompensationcurrentcontrolstrategy.Thethree-legconverterwhichhascleardivisionisadoptedasthemaincircuit.Attheendofthepaper,thesimulationplatformisbuiltbyuseofMATLAB/Simulinksoftware.Theoutputinductanceparameterandsoft-startschemearesimulatedrespectively.Theresultsprovethatoutputinductanceparameterisreasonableandthesoft-startschemeisfeasible.Then,theintegratedsimulationforSAPFandcompensationsystemiscarriedout.Finally,simulationresultsshowthatSAPFhasagoodcompensationcharacteristicfortheharmonicproducedbythebalanceandunbalancenonlinearloads,andbalancesthree-phaseloadsinthree-phaseandfour-wiresystem.Atthesametime,simulationresultsshowthatharmonicdetectionmethodiscorrectandthecontrolstrategyisproper.Keywords：harmonicdynamiccompension；shuntactivepowerfilter；three-phasefour-wiresystem；qpiialgorithm；MATLAB/Simulink本科生毕业论文3第一章绪论...................................................................................................................................51.1谐波概述及其危害...........................................................................................................51.2谐波抑制强...............................................................................................................61.2.1无源电力滤波器...................................................................................................61.2.2有源电力滤波器....................................................................................................61.2.3混合型有源电力滤波器.......................................................................................81.3有源电力滤波器的发展和应用.......................................................................................91.3.1有源电力滤波器的发展.......................................................................................91.3.2有源电力滤波器的应用.......................................................................................91.4本文的研究的意义和内容设置及主要任务.................................................................10第二章三相电路谐波及无功电流的检测.................................................................................112.1基于瞬时无功功率理论的电流检测方法.....................................................................112.1.1瞬时无功理论原始定义及发展.........................................................................112.1.2瞬时无功功率理论.............................................................................................112.1.3坐标变换.............................................................................................................162.2三相四线制系统中基于瞬时无功功率理论的检测方法...........................................172.2.1qp法检测电流............................................................................................172．2．2qdii指令运算方法.....................................................................................172.3谐波分量的处理.............................................................................................................182.3.1对基波零序分量的处理.....................................................................................182.3.2对基波负序分量和高次谐波分量的处理.........................................................192.4qp运算方式和qpii运算方式的优缺点...............................................................19第三章并联型三相四线制补偿电流发生电路方案选择.........................................................203.1三相四线制系统APF主电路形式和结构选择设计.....................................................20本科生毕业论文43.1.1四相变流器结构形式.........................................................................................213.1.2三相变流器结构.................................................................................................213.2三相四线并联型有源电力滤波器主电路的参数选择.................................................223.2.1主电路容量的确定..............................................................................................223.