论文-XXX-康涛

毕业设计（论文）题目：三相SPWM逆变器的数学建模与性能分析学院：电子信息学院专业班级：电气工程及其自动化12级5班指导教师：康涛职称：讲师学生姓名：XXXXXX学号：41203040514西安XX大学本科毕业设计（论文）I摘要随着电力电子技术的飞速发展,逆变电源已被广泛应用在各个领域中，工业、企业对逆变器的输出电压波形质量也提出了越来越高的要求。逆变器输出波形质量的要求主要包括以下几个方面：一，要求稳态输出精度高；二，要求动态输出性能好；三，期望输出电压波形的谐波分量要少。因此，研究开发既简单又具有优良动、静态性能的逆变器控制策略，已成为电力电子领域的研究热点之一。本文主要研究设计依据光伏发电、风力发电等新能源发电中的单相逆变器以及三相逆变器。通过对其主电路拓扑分析并建立其数学模型，依据数学模型进行元件选型，滤波部分选择LC滤波器。在控制结构上，开环控制和单闭环控制使用SPWM脉宽调制技术，双闭环控制选用空间矢量PWM脉宽调制（SVPWM）。最后，在理论分析的基础上对单相单闭环控制与三相开环、单闭环控制在MATLAB仿真实验平台中搭建了仿真模型来对其进行仿真验证。实验结果表明本文设计研究的逆变器动、静态运性能效果良好，实验输出波形有效地减小了谐波分量，基本达到了理想要求，验证了理论分析的正确性。关键词：单相，三相，逆变器，闭环控制，SPWM西安XX大学本科毕业设计（论文）IIABSTRACTWiththerapiddevelopmentofpowerelectronicstechnology,theinverterpowersupplyhasbeenwidelyusedinvariousfields,industrial,enterprise,thesensitivedeviceoftheinverteroutputvoltagewaveformqualityalsoputforwardhigherandhigherrequirements.Therequirementsoftheinverteroutputwaveformqualitymainlyincludethefollowingaspects:first,therequirementsofthesteadyoutputaccuracyishigh;thetwoistherequirementofthedynamicoutputperformanceisgood;thethreeisthedesiredoutputvoltagewaveformoftheharmoniccomponenttobeless.Therefore,ithasbecomeoneofthehotspotsinthefieldofpowerelectronicstostudyanddeveloptheinvertercontrolstrategywhichissimpleandhasexcellentdynamicandstaticperformance.Thispapermainlystudiesthedesignbasisofphotovoltaicpowergeneration,windpower,andotherenergysourcesinthesingle-phaseinverter,three-phaseinverter,throughitsmaincircuittopologyanalysis,theestablishmentofmathematicalmodel.Thenthecomponentparametersselection,inthedesignofthefilterpartoftheselectionofLCfilter,inthepulsemodulation,openloopandDanBihuanuseSPWMpulsewidthmodulationtechnology,Inordertofacilitatetheprecisecontroloftheinvertercontrolsystem,thedoubleclosedloopvectorPWM(SVPWM)isused.Thenthemodelofthecontrolcircuitisestablishedusingtheclosed-loopcontrolsystem.Finally,alltheresearchcontentofthispaperisestablishedintheMATLABplatform.Theexperimentalresultsshowthatthedynamicperformanceoftheinverterisstable,andtheexperimentaloutputwaveformcaneffectivelyeliminatetheharmoniccomponenttoachievetheidealrequirements,andverifythecorrectnessofthetheoreticalpart.Keywords:Singlephase，three-phase，inverter，closed-loopcontrol，SPWM西安XX大学本科毕业设计（论文）III目录摘要...............................................................IABSTRACT........................................................II第1章绪论........................................................11.1背景.........................................................11.2研究目的及意义...............................................21.2.1促进新能源的开发和利用..................................21.2.2提高供电质量............................................21.3研究方案.....................................................3第2章系统数学模型.................................................42.1主电路模型...................................................42.1.1单相逆变器数学建模......................................42.2.1三相逆变器数学模型......................................62.2三相坐标变换.................................................92.2.1三相静止和两相静止变换..................................92.2.2两相静止和两相旋转变换.................................112.3控制系统模型................................................122.3.1单相逆变器闭环控制.....................................122.3.2三相逆变器单闭环控制...................................132.3.3三相逆变器双闭环控制...................................142.4本章小结....................................................15第3章系统电路设计................................................163.1正弦PWM（SPWM）原理分析................................163.1.1SPWM的控制原理......................................163.1.2SPWM的调制方式.......................................163.2空间矢量PWM（SVPWM）原理分析...........................183.2.1SVPWM的基本原理.....................................183.2.2SVPWM的调制方式.....................................19西安XX大学本科毕业设计（论文）IV3.3逆变器电路LC滤波设计......................................213.4主电路系统仿真结构..........................................233.4.1单相逆变器闭环控制.....................................233.4.2三相逆变器单闭环控制...................................243.4.3三相逆变器双闭环控制...................................243.5本章小结....................................................25第4章仿真结果分析................................................274.1单相开环控制的仿真..........................................274.1.1主仿真电路.............................................274.1.2仿真结果及分析.........................................274.2单相闭环控制仿真............................................284.1.1主仿真电路及控制电路...................................284.1.2仿真结果及分析.........................................294.3三相逆变器开环控制仿真......................................294.1.1主仿真电路.............................................294.1.2仿真结果及分析.........................................304.4三相闭环控制仿真的电路......................................304.1.1主仿真电路及控制电路...................................314.1.2仿真结果及分析.........................................314.5本章小结....................................................32第6章总结与展望..................................................33参考文献...........................................................34致谢.............