Online Control of Smart Inverter for Photovoltaic Power
The main purpose of this study is to engage in research on a grid-connected photovoltaic (PV) power generation system smart inverter. The research content includes a
The grid-forming-based inverter control consists of a virtual synchronous machine (VSM) for regulating the voltage and frequency of the power system along with active power control and reactive power control for significantly improving the dynamic performance of the grid-connected PV system.
The grid-following-based inverter control consists of a phase-locked loop and inner current control loop for providing the control for the inverter currents as shown in Figure 3. This work utilizes active–reactive power control (PQ control) in the outer control loop.
Proper inverter management in grid-connected PV systems ensures the stability and quality of the electricity supplied to the grid. An appropriate control strategy is necessary to ensure reliable performance over diverse system configurations and fluctuating environmental conditions.
The inverter is connected to the grid by an LCL filter. The simulation system block diagram is shown in Figure 9. Simulated system block diagram. The simulation carries the three PV modules which are connected in series.
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