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.