三相四线并联型有源电力滤波器的仿真及研究的应用

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1、本科生毕业论文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

2、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；算法MATLAB/SimulinkAbstractWithextensiveapplicationofpowerelect

3、ronicdevicesinproductionandlife,theymakepowerenergyconversionandapplicationeasily,butalsoleadtotheseriousharmonicpollutioninthepowersystem.Atpresent,theshuntactivepowerfilter(SAPF)hasbeenaneffectivewaytodynamicallycompensatereactivepowerandharmonic.Inadditiontotheseproblems,theload

4、unbalanceismoreandmoreseriousinthree-phasefour-wiresystem,therefore,SAPFappliedtothree-phasefour-wiresystemisresearchedanddesignedtosolvetheseproblemsinthispaper.FortheharmoniccurrentdetectionofSAPFinthree-phasefour-wiresystem,thealgorithmbasedontheinstantaneousreactivetheoryisdeta

5、iledlyderived,andthisalgorithmisdemonstrateditcouldbedirectlyappliedtothree-phaseandfour-wiresystemwithoutbeingimproved.Hysteresis-bandcomparisonmethodischosenascompensationcurrentcontrolstrategy.Thethree-legconverterwhichhascleardivisionisadoptedasthemaincircuit.Attheendofthepaper

6、,thesimulationplatformisbuiltbyuseofMATLAB/Simulinksoftware.Theoutputinductanceparameterandsoft-startschemearesimulatedrespectively.Theresultsprovethatoutputinductanceparameteris38本科生毕业论文reasonableandthesoft-startschemeisfeasible.Then,theintegratedsimulationforSAPFandcompensationsy

7、stemiscarriedout.Finally,simulationresultsshowthatSAPFhasagoodcompensationcharacteristicfortheharmonicproducedbythebalanceandunbalancenonlinearloads,andbalancesthree-phaseloadsinthree-phaseandfour-wiresystem.Atthesametime,simulationresultsshowthatharmonicdetectionmethodiscorrectand

8、thecontrolstrategyisproper