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ID:32469851
大小:3.63 MB
页数:71页
时间:2019-02-06
《并联电压型有源电力滤波器的开发》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、中文摘要随着电力电子技术、微电子技术和现代控制理论的发展,有源电力滤波器取得了飞速的发展,可以对谐波、无功以及负序电流实现实时、准确地补偿,目前被公认为是综合治理“电网污染弹最有效的手段,因此得到了广泛的研究,并开始进入工业应用阶段。本文首先对有源电力滤波技术产生的背景、发展现状以及发展趋势作了详细的阐述,并介绍了有源滤波器的分类及其原理,对基于瞬时无功功率理论的谐波检测方法进行详述,莠改进了原来广泛采用鲍三角载波脉宽调制方法,转嚣采用基于非对称规则采样的脉宽调制方法,可以实现准确的谐波检测与PWM信号产生。进一步,分剐搭建了并联电压型
2、有源电力滤波器各部分仿真模型。并针对其直流侧电压控制设计了一套模糊PID控制仿真模型,仿真结果表明,其控制效果优于原有常规PID方法,该有源电力滤波器能有效地消除谐波电流,同时具有良好的动态补偿特性,验证了理论分析的正确牲和可行性。在实际应用巾,设计了基于瓢公词数字信号处理器(DSP)TMS320F2812为控制器的并联型有源电力滤波器样机,搭建了硬件电路并编写了整套谐波检测及补偿算法程序。实验结果表明,该装置具有良好的实时检测、准确补偿的性熊。关键词:有源电力滤波器谐波抑制模糊PID数字信号处趋器①sP)ABSTRACTWiththe
3、developmentofelectric—electronictechnology,microelectronictechniqueandmoderncontroltheory,activepowerfilterhasobtainrapiddevelopment,bywhichtheharmonic,reactiveandnegativesequencecurrentcanrealizereal-timeandaccuratecompensation.AtpresentAPFisconsidered‘as’themosteffecti
4、vemethodtoeliminatetheserious’'powerpollution”andhasbeenwidelyinvestigatedatthestageofenteringindustrialapplication。Firstthedissertationintroducesthebackground,presentsituationanddevelopmenttrendsofAPFandanalysestheclassificationandprincipleofAPFindetail。Basingondeeplyan
5、alyzingthetheoryofinstantaneousreactivepower,detectingmethodforhi曲frequencyharmoniccurrentispresentedandthemethodofpulsewidthmodulationbasedonunsymmetricalrulesamplingisimprovedinsteadoftheformerthemethodbasedonsymmetricrulesampling.APFcanachieveaccurateharmonicdetection
6、andproductionofPWMsignalinthoseways。Furthermore,themodelsofeverypartsoftheshuntAPFarebuiltrespectively.AndafuzzyPIDcontrolleriSdesignedtocontrolDCvoltageandachievesbetterperformancethanthatoftheconventionalPID.ThesimulationresultsindicatethatTheAPFcaneliminateharmoniccur
7、rentandhasgooddynamiccompensationcharacteristics,whichverifythecorrectnessandfeasibilityofthetheoreticalanalysis.Inpracticalapplications,ashuntactivepowerfilterprototypebasedon"17digitalsignalprocessor∞SP)TMS320F2812isdesigned,includingthehardwarecircuitstructuresandthep
8、ackageofharmonicdetectionandcompensationalgoriflamprocedure。Theexperimentalresultsshowthatthedevicehasa
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