Simulate grid connected solar photovoltaic system 3- phase 25KW

PV array output is connected to boost converter to boost the voltage, duty cycle of switches is controlled by maximum power point technique(P&O algorithm) and then it is given to 3 phase two level voltage source inverter to convert dc to ac. inverter output is connected to grid and load3-phase (balanced ,unbalanced ,linear, non-linear, so total 4 combinations),whatever may be the load current harmonics should be within IEEE standards. for that we need controller ,i.e even for unbalanced load current waveforms should be sinusoidal this has to be done by controller and for non linear and linear loads current harmonics should be within limits. Lets say if pv array generates 25kw power and load is only 20kw , remaining 5kw is supplied to grid, but if load is 30kw then remaining 5kw is supplied from grid. Controller block diagram is given below if any slight changes are there you are free to do it. But finally the system should work. I actually simulated but my controllers are not getting tuned properly . In the block diagram in place of current controllers I used PR controllers, but again please change it if required.