摘要
光伏并网逆变器是将太阳能转化成电能不可或缺的装置。设计高质量、高效率和高可靠性的逆变装置,具有重要意义。选择双降压全桥电路拓扑,没有桥臂直通的危险,无需设置死区时间,提高了并网电流的波形质量。采用单极性倍频SPWM算法并对工作模态进行了分析,搭建了Matlab仿真模型和500 W实验平台,通过仿真模型和实验平台的实验分析对比,验证了方案的正确性。
When the solar energy is converted into electrical energy,the photovoltaic( PV) grid- connected inverter is an indispensable device. Designing a inverter device with high quality,efficiency and reliability is of great importance. This paper uses the dual buck full- bridge grid- connected inverter with out the bridge straight risk. As the shoot- through problem does not exist in the proposed topology,it is unnecessary to set the dead time for the power- transistor which can be used to improve the quality of the grid.In this paper,the dual buck unipolar SPWM modulation is chosen to analyze the operating state. The advantages of the proposed methodology are verified by simulation in the Matlab. The most important part in this paper is that 500 W experimental platform is built in the key laboratory,which is used to verify the correctness and feasibility of the design.
出处
《机械制造与自动化》
2016年第6期196-199,共4页
Machine Building & Automation
