Integration of DFIG based wind turbine and PV plant in order to reduce the number of power converters

This paper presents an integration of doubly fed induction generator (DFIG) and photovoltaic plant which selected controllers show fast and efficient response against environmental changes. Among different methods for tracking maximum power point of solar array like perturb and observe, incremental conductance and etc., an analytical method is employed which shows a great dynamic response and tracking efficiency in different conditions. For the rotor side converter (RSC) and grid side converter (GSC) of the system, predictive direct power control (PDPC) is applied to have fast response, low switching frequency and small power ripple. Therefore by selecting the mentioned control strategies for converters, the whole system operates fast and perfectly. Since the PV plant is added to DFIG, the GSC rating is also investigated. To show the performance of system a 2 MW DFIG and 350kW PV array is utilized and simulated in Matlab/Simulink.