基于DSP控制的多输出并网逆变器

针对世界各国电网电压规格种类较多的情况，提出一种基于DSP控制的可输出多个国家电网电压规格的并网逆变器。通过DSP控制和2台逆变器的串联和并联，实现了多种规格电网电压的输出，且串联和并联2种运行模式不影响系统的稳定性。详细阐述了逆变器的工作原理，分析了2台逆变器在串联模式下的均压和在并联模式下的均流效果，及串联和并联2种运行模式对系统稳定性及相对稳定性的影响，并以一台1 000 VA基于DSP控制的串并联双降压式半桥逆变器进行了实验验证。实验结果表明在串联和并联2种运行模式下2台逆变器具有很好的功率均分度。

Research on Multiple Output Grid-connected Inverters Based on DSP Control

According to the different grid voltage in many countries, a novel multiple output grid-connected inverter is proposed based on DSP control. The grid-connected inverter can output many kinds of countries' grid voltage by series or parallel of two inverters and DSP control. The stability of the grid-connected inverter is unaffected at two modes. The operation principle, current sharing of two inverters at parallel mode, voltage sharing of two inverters at series mode, stability and relative stability between series and parallel modes are analyzed in detail. Finally, a 1 000 VA series and parallel combined dual-Buck half-bridge inverters is established based on DSP control. The experimental results verify the theoretical analysis and show the power of each inverter shares well.