基于NiosⅡ的光伏发电最大功率点跟踪交错式控制研究  

Study on the Interleaved Control for the MPPT of PV System Based on Nios Ⅱ

作　　者：李畸勇[1] 龚仁喜[1] 程晓琼 卓浩泽[1] 俸昭合[1] 

机构地区：[1]广西大学,南宁530004 [2]乐山电力股份有限公司峨眉山分公司,四川峨眉614200

出　　处：《电测与仪表》2012年第11期44-48,共5页Electrical Measurement & Instrumentation

基　　金：广西自然科学基金资助项目(2010GXNSFA013023);广西大学科研基金资助项目(XBZ110591)

摘　　要：讨论了光伏阵列的输出特性,在分析常用光伏发电最大功率点跟踪控制方法(MPPT)的基础上,提出将模糊控制算法用来实现MPPT。在分析对比传统单BOOST电路和交错并联BOOST电路的基础上,得出采用交错并联控制的双BOOST电路有较少的谐波含量,适用于光伏发电这类宽电压输入对象。基于模糊控制MPPT和交错并联控制的双BOOST电路,搭建了用FPGA软核处理器Nios II控制系统实现的光伏发电最大功率点跟踪。实验结果表明系统能在最大功率点处稳定工作,并能快速跟踪外部环境变化,具有较好的动态和稳态性能。Characteristics of PV array and traditional maximum power point tracking （MPPT） methods are discussed and analyzed in this paper. Fuzzy control method is introduced for the MPFF of PV system. Based on analysis of convention-al single BOOST circuit and interleaved parallel dual BOOST circuit, interleaved dual BOOST having less total harmonic distortion （THD） can be obtained, which is most suitable for the wide input voltage object like PV system. Based on fuzzy control the MPPT of PV and interleaved dual BOOST circuit, the control system to achieve MPPT of PV system based on FPGA soft processors Nios Ⅱ is built. The experimental results show that the proposed system can track the changes with the external environment, and can stably run in MPP with good dynamic and static performances.

关 键 词：光伏发电 最大功率点跟踪 模糊控制 交错并联 NIOSII处理器 

分 类 号：TM933[电气工程—电力电子与电力传动]