Functions and requirements of the inverter

I need to solve this problem:

Question:

For this block diagram of a PV system below I need to describe the main functions of the inverter. In your answer I have to discuss the requirements for the inverters used in PV systems.

I've already found requirements for the inverters used in PV systems.

Power electronics (inverter):


Power conversion and conditioning
Undervoltage/overvoltage
Under frequency/over frequency
Overcurrent
Synchronization
Ground fault overvoltage
Active anti-island function


But could you help me with describing the main functions of the inverter and describing requirements above?

Hi

What do you mean main functions of the inverter? Do you mean the parts of the inverter? http://www.mpptsolar.com/en/how-does-an-inverter-work.html

Thanks mate, I will try to grab sth from this link above.

And how could I discuss the requirements such as these below?

Power electronics (inverter):

Power conversion and conditioning
Undervoltage/overvoltage
Under frequency/over frequency
Overcurrent
Synchronization
Ground fault overvoltage
Active anti-island function

Any ideas where could I take the sufficient knowledge from?