Photovoltaic grid-connected inverter control simulation

What is a grid connected photovoltaic system?

Abstract: The purpose of the work was to modeling and control of a grid connected photovoltaic system. The system consists of photovoltaic panels, voltage inverter with MPPT control, filter, Phase Looked Loop (PLL) and three phase grid. The connection of the inverter to the grid is provided by an inductive filter (R, L).

How do inverters affect a grid-connected PV system?

For a grid-connected PV system, inverters are the crucial part required to convert dc power from solar arrays to ac power transported into the power grid. The control performance and stability of inverters severely affect the PV system, and lots of works have explored how to analyze and improve PV inverters’ control stability .

What is a p/q control strategy for photovoltaic grid-connected inverters?

In photovoltaic grid-connected (GC) and DG systems, one of the objectives that the grid-connected inverters (GCI) is the control of current coming from the photovoltaic modules or DG units. In this way, this paper describes a simple P/Q control strategy for three-phase GCI. Initially, the proposed control of the grid side is introduced.

What is a grid-linked PV system?

Grid-linked photovoltaic (PV) plant is a solar power system that is connected to the electrical grid 39, 40. It consists of solar panels, an inverter, and a connection to the utility grid (see Fig. 3). Block schematic of a grid-linked PV system.

What is the control performance of PV inverters?

The control performance of PV inverters determines the system’s stability and reliability. Conventional control is the foundation for intelligent optimization of grid-connected PV systems. Therefore, a brief overview of these typical controls should be given to lay the theoretical foundation of further contents.

What is a grid-connected inverter?

4. Grid-connected inverter control techniques Although the main function of the grid-connected inverter (GCI) in a PV system is to ensure an efficient DC-AC energy conversion, it must also allow other functions useful to limit the effects of the unpredictable and stochastic nature of the PV source.