一种单级式三相升压型并网逆变器的控制策略  

Control Strategy for Single-Stage Three-Phase Boost-Type Grid-Connected Inverter

作　　者：吴春华[1] 张翼[1] 崔开涌[1] 陈国呈[1] 陈卫民[1] 肖鹏[1] 

机构地区：[1]上海大学自动化系上海市电站自动化技术重点实验室,上海200072

出　　处：《电工技术学报》2009年第2期108-113,共6页Transactions of China Electrotechnical Society

基　　金：教育部博士学科点专项基金(20060280018);上海市科委登山计划项目基金(06DZ12211)资助项目

摘　　要：提出了一种单级式三相升压型并网逆变器的控制策略,详细分析了主电路的工作原理,推导了并网电流的输出特性,进行了仿真研究。建立了基于DSP芯片TMS320LF2407的控制系统实验平台。仿真和实验结果表明,该方案通过一级变换同时进行升压和DC/AC变换,最终实现高功率因数电流源并网,省去了传统电流型逆变器中直流侧工频电感,同时任何时刻只有两个开关管导通。本逆变器体积小、成本低、效率高,由于采用了数字控制,具有控制灵活、稳定性高、并网电流质量好等优点。A control strategy for three-phase boost-type grid-connected inverter is proposed. The operation principle of the inverter is analyzed in detail. The output characteristics of the grid current are derived. The digital control system is based on digital signal processing （DSP） TMS320LF2407. The simulation and experimental results show that current-source grid connection with high power factor can be realized by single-stage boost DC/AC conversion. Moreover, the power frequency inductors in traditional current-source inverter are removed and only two switches are communicated at any time. Therefore, the proposed inverter has advantages of small volume, low cost, high efficiency, flexible control, high stability and high quality grid current based on the DSP control.

关 键 词：并网 电流型 逆变器 升压型PWM 

分 类 号：TM464[电气工程—电器]