It is clear from Fig. 11a that the proposed
MPFC effectively controls the boost converter output voltage
to be around the reference value (√2× V gr ). In addition, the
current is maintained to the value as required for the
maximum power (Fig. 11b). The analogous duty cycle
variation is also presented in Fig. 11c. It is well understood
that a constant DC link voltage in proper coordination with the
grid voltage ensure the correct amount of power flow between
the inverter input and grid output.