DSP-based three-phase grid-connected photovoltaic inverter

Can a modified dual-stage inverter be used for grid-connected photovoltaic systems?

In this paper, a modified dual-stage inverter applied to grid-connected photovoltaic systems performed for high power applications has been studied. The modified dual-stage inverter contains DC-DC stage and DC-AC stage.

Should grid code regulation be followed when integrating a PV inverter system?

Grid code regulation must be followed when integrating the photovoltaic inverter system to the grid. The paper investigates and analyzes a controller model for grid-connected PV inverters to inject sinusoidal current to the grid with minimum distortion.

How does a grid connected dual-stage inverter work?

In the proposed grid-connected dual-stage inverter, the direct axis current, Id, is observed, which serves for the inverter stage to set Vdc. These actions define the DC-DC converter’s input characteristic behavior, which determines the PV array operation point . When Id is maximized, the PV array operates on MPOP.

What is a distributed power generation inverter?

Inverters in distributed power generation (DG) systems include dc–ac conversion, output power quality assurance, various protection mechanisms, and system controls [ 4 ]. To compensate the grid harmonics and provide disturbance rejection capability, stationary-frame generalized integrators are used to control the fundamental current [ 5 ].

Can a grid-connected PV inverter inject sinusoidal current to the grid?

The paper investigates and analyzes a controller model for grid-connected PV inverters to inject sinusoidal current to the grid with minimum distortion. To achieve better tracking and disturbance rejection, a DSP-based current controller is designed with LCL filter.

Are control strategies for photovoltaic (PV) Grid-Connected inverters accurate?

However, these methods may require accurate modelling and may have higher implementation complexity. Emerging and future trends in control strategies for photovoltaic (PV) grid-connected inverters are driven by the need for increased efficiency, grid integration, flexibility, and sustainability.