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This paper takes us through different objectives to make the grid-connected hybrid system work effectively. In this paper, Double-Fed Induction Generator-controlled Wind Energy System integrated with a Solar PV plant is connected to the Grid. The observed non-linear variation of solar irradiation and temperature was controlled by the MPPT controller which, tries to maintain the maximum power condition at almost all instants. In this paper, the incremental conductance type MPPT method is employed for solar PV plant whereas, in the case of a wind farm, the use of back-to-back connected VSC incorporated in the DFIG maintains unity power factor for different wind speed variations. As energy availability from renewable sources is intermittent, the harmonics at the load side are inevitable. These can was reduced by using a 3-Level VSC with suitable PWM techniques to some extent. In this paper, three different cases to find the best way to integrate the wind and solar PV energy systems into the Grid have been considered. MATLAB/SIMULINK was used to do simulations with THD measurements for three different cases.
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