We already now that while changing the duty cycle of DC/DC converter in order to track the MPP, the output voltage of the converter is going to be changed as well.
So, the output voltage of the DC/DC converter will not be stable to supply a load or to charge a battery since we need a stable constant voltage to supply the load.
My question is:
How could we provide a constant voltage in the output of the DC/DC converter while getting the best results from the MPPT at the same time?
The simplest way is to use a hysteresis-current-controlled (HCC) or hysteresis-voltage-controlled (HVC) to regulate the output voltage on a DC link.
I think there is some confusion here. MPPT should guarantee a maximum power output - but if you have a constant voltage load eg a grid or a battery, the MPPT actually is maximising the output current. You have to have a consistent SYSTEM design for this to work. If your MPPT can't work into a fixed voltage load as required by the system then that is a SYSTEM problem and the MPPT needs redesigning.
you can apply the increaser voltage or current in output before the load or battery . With this method the battery maybe will charge. Because the input of battery equal or greater than the output of the dc-dc converter.
Thank you for your point Tony Maine , I don't have a problem with the MPPT itself. I've read many papers and I noticed that this point was not clear enough for fixing the output voltage.
Abdulkadir, the power output is Volts V x Current I at the output of the MPPT. The MPPT cannot fix the voltage AND optimise the product of V x I (if V is in effect a constant) without having the load absorb more (or less) current.
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