Hi,
The Perturb and Observe (P&O) algorithm is a commonly used Maximum Power Point Tracking (MPPT) algorithm for photovoltaic (PV) systems. Its primary purpose is to calculate the reference voltage for adjusting the duty signal of the power converter to track the maximum power point of the PV array.
The P&O algorithm, in its basic form, is designed to adjust the duty cycle of the power converter based on the comparison of the PV array's output power at two consecutive iterations. By perturbing (changing) the duty cycle and observing the change in the PV array's power, the algorithm determines whether to increase or decrease the duty cycle to track the maximum power point.
However, the P&O algorithm itself does not directly calculate the reference current. Its main focus is on adjusting the duty cycle to maximize power extraction from the PV array. The reference current is typically determined based on the characteristics and requirements of the specific power converter and control strategy used in the PV system.
If you need both the reference voltage and reference current as outputs of the MPPT algorithm for adjusting the duty signal, you can still use the P&O algorithm as a part of your overall control strategy. The P&O algorithm can provide the reference voltage, and you can separately determine the reference current based on the specific requirements of your system.
It's important to note that the choice of MPPT algorithm and the design of the control strategy depend on various factors, including the PV system configuration, power converter topology, load requirements, and desired performance. It's recommended to analyze your system requirements and consult relevant literature or experts to determine the most suitable MPPT algorithm and control strategy for your specific application.
Refer to the following MathWorks documentation link for more information regarding the same:
