It seems my question wasn't understood well, so I apologize and will clarify it:
I am working on the control of a
boost converter connected to a
solar panel, where I want to implement an
MPPT control to calculate the appropriate duty cycle for the switch. The control is almost finished, but I am missing a
transfer function to design the PI controller. The function I need is
Vpv/iC (where iC is the current of an
input capacitor connected in parallel to the solar panel and the converter) or
Vpv/iL. Either of these two functions would help me finalize the control phase.
The information I’ve received so far is something I already know. As for searching online, most resources I’ve found only address MPPT control from an algorithmic approach, which I have already resolved. Additionally, in the theses I’ve reviewed, they only show results, which isn’t helpful in my case.
Recently, I found a solution (
Vpv(s)/iC(s) = 1/C*s) that suggests using only the capacitor current equation to derive the transfer function. My concern is that the
voltage of the solar panel also depends on the
duty cycle (D), the
conditions of the panel, and other factors. Therefore, I fear this approach may not capture the complete dynamics of the system, but I am not sure.
I'll share some schematics to visualize it better.
I would appreciate any guidance or confirmation on whether this approach is appropriate.