光伏发电系统并网逆变控制实验的研究.pdf

太原理工大学硕士研究生学位论文及并网电流的指令获取。在对逆变器开关管的脉冲宽度调制上采用了 SVPWM调制技术,给出了在DsP控制器上实现软件方法SVPWM调制的具体步骤。在实验系统的设计方面,搭建了两级式光伏并网发电系统的后级并网逆变的硬件实验平台。介绍了以TMS320F2812为控制器的硬件平台构成, 包括对主功率模块、驱动电路、保护电路及过零点检测电路的设计原理分析。按照系统控制策略实现算法设计编写了软件程序系统的主程序、中断子程序以及各个功能子模块程序,为实验平台调试提供了硬件和软件支持。在所设计的系统实验平台上进行了软、硬件系统调试,完成了独立系统实验和部分并网实验,采集了实验波形。通过对实验结果的分析可以看到,本文所采用的控制策略及程序编写是正确的,硬件系统能够可靠运行, 为后续的进一步实验奠定了坚实基础。关键词:光伏发电,并网逆变器,电网电压定向,SⅥ,WM 太原理工大学硕士研究生学位论文 RESEARCH oN GRID—CONNECTED Dn砸IUlER CONTROL INPHOTOVOLrAJC POⅥ任’]R GENERATION SYSTEM ABSTRACT Ene玛y crisisand the increasingly s嘶ous problem of environlnental p01lution haVe perplexed thepace ofhuman ,and havebecaIne themost serious new hnds ofcleanenergy such aswind energy,s01ar黜【e唱y,bio-ene玛y aJld so on are widely focused because ofmeir parable adVantages. S01ar ene玛y has been recognized as the most potential type ofsubstituted energM we may e)【pect,in也enear如tllre,solar ene玛y willhold animportant position i11t11ebasicene玛ysupplies. Solarenergy generation tecllnology isbased onphotoelec仃ic efrect,by the PV panels,sunlight isconVerted intoelectrici哆 SolarphotoVoltaic power generation system collvert s01arene玛y toAC electricity thatmeets thegIid requirements,and aCcess tothela唱e鲥d realizegrid—co衄ected operation. Recently,the key techniques ofs01arphotoV01taic power generation system mainly include severalaspects:e伍ciency ofs01arpanels,maXimum power point trac虹ng and the con廿01 ofgnd—connected —coImected inverter techll0109y isthe core ofthewhole ,p叩ular reseaIch in our country istwo—stage PV grid—connected power generation thispaper, 妤d—collllected inv叫er ofmisstmctllresystem isresearched asfollows: FirstlM The de、,e1叩ment ofcurrent sitllationabout s01arph。t。v。1taic power generanon athome and abroad isdiscussed, The signi6cance and adVantage ofChina’s曲otoV01taic power gen蹦越onteclm0109y arepointed out, typesof印d。co衄ected PV systems andt11e鲥d-co皿ected teclln0109y standard are introduced·SecondlM t