What are flexible power control solutions for PV systems?

In this regard, flexible power control solutions are of interest for PV systems, as an essential function of smart PV inverters, to minimize the adverse impact in grid-integration and operation. On the other hand, PV systems can be adapted to provide ancillary services, e.g., voltage and frequency support through the power control.

What is grid-integration of PV systems?

In general, the grid-integration of PV systems involves several components, as shown in Fig. 6, where the PV panels are the power sources, the power electronics converter is in charge of the power delivery to the grid (i.e., to realize the power conditioning), and the grid as the load has specific requirements that should be followed.

Why do PV systems need flexible power control strategies?

By implementing the flexible power control strategies with necessary support, the PV systems can produce smooth power to the grid, if required, to handle the environmental intermittency and non-dispatchability (uncertainties).

What is the P-V curve of a PV system with fppt control?

The P-V curve of a PV system with the FPPT control by limiting the output power is shown in Fig. 5. It can be seen from Fig. 5 that there are two power limiting points, i.e., at the left and the right sides of the MPP (FPP1 and FPP2).

What is a grid connected PV system?

General grid-connected PV systems, where the power converter is responsible for the power conditioning according to the grid requirements (PCC – point of common coupling; RMS – root-mean-square; IGBT – insulated-gate bipolar transistor).

How a PV system regulates the output power flexibly?

In such a case, the PV systems can regulate the output power flexibly without additional hardware devices. However, conventionally, the PV systems are controlled by an MPPT strategy to optimize the power generated from the PV arrays. With an MPPT, the PV systems are always seeking the MPP.