A Novel Sine Duty-Cycle Modulation Control Scheme for Photovoltaic Single-Phase Power Inverters

摘要

In this paper, a novel SDCM (sine duty-cycle modulation) scheme for photovoltaic (PV) singlephase power inverter is presented. Unlike popular SPWM (sine pulse width modulation) strategies, the SDCM control scheme consists of a minimum number or building components, while offering a robust feedback control topology. The main DC power to be converted, is delivered by an upstream PV panel. Then, a SDCM circuit with appropriate basic modulation frequency, is used as a switching driver for power MOSFETs of a single phase H-bridge inverter. The merits of the proposed SDCM control scheme, are proven using analytical developments, followed by relevant virtual simulations conducted on a prototyping power inverter within Multisim software framework. Moreover, the virtual simulation results obtained are presented, in order to show the high quality of the proposed class of SDCM control schemes for PV Single-phase power inverters.