Development of maximum power point tracking modeling in dfig based wind turbine

Wind energy conversion systems (REDS), which have a significant development among the developing complementary energy sources, have recently been stated as an alternative source to meet the increasing energy demand. Wind power plants, which are used to convert the aerodynamic energy of the wind into mechanical energy, are very important in the energy conversion phase. The mechanical energy produced by these power plants is converted into electrical energy with the help of a generator. These generators are designed as double-fed asynchronous generator (DFIG), permanent magnet synchronous generator (PMSG), and squirrel cage asynchronous generator (SCAG). In large-scale WECS, LMW-based WECS are used because of the applicability of power and torque control and the ability to operate more efficiently at variable wind speeds. Taking this situation into consideration, (DFIG) based WECS was examined in this study. While the stator terminals of DFIG-based wind turbines are directly connected to the grid through a transformer, the rotor part is connected to the grid through power converters located between the rotor and the transformer. Since wind energy has a variable speed, energy production must be achieved by achieving maximum efficiency at every point of the wind speeds determined as the lower and upper limits. For this reason, the lower and upper limits should be determined and a MPPT control should be applied between these values and a maximum production should be made at all variable wind speeds. In this study, maximum power point tracking (MPPT) control was designed in order to obtain maximum efficiency at every level of wind energy produced by a grid-connected double-fed asynchronous generator (DFIG) with variable speed wind and the graphs formed with the help of various parameters were analyzed. Wind speeds of 8 m/s, 10 m/s, 12 m/s and reference speeds of 90 rad/s, 153 rad/s, 297 rad/s were obtained in the simulation study and comparisons were made between the results. The results obtained show that the project, designed by considering variable wind speeds, is reliable and usable for the grid connected DFIG. Keywords: MPPT, DFIG, WECS, Wind Speed, Productivity.