MODELLING AND CONTROL OF WIND-DRIVEN DFIG

Abstract

Wind energy stands out among other renewable coffers or energy sources (RESs), analogousto solar, wave, and geothermal energy due to its highest level of safety and low cost among all other types of renewable resources. There were no precise guidelines demonstrated to concatenate the wind dynamic networks to the grid or any other load in the early eras when sharing wind energy with the grids was relatively low and inconsequential. It was then advised to disconnect the wind turbine from the grid and any other connected power electronic converters in the event of any sudden abrupt disturbance or speed change in the system. However, DFIG is presently often times employed in wind turbines because it is protean and adaptive to the sudden or abrupt wind. DFIG model is modeled in the dissertation, which includes a thorough examination of modeling, analysis, and control at operating speeds below, equal to, and above synchronous speed. Stator equations are expounded through a reference framework run by the stator flux, while the rotor equations are in a synchronously rotating reference frame. Wind turbine miniatures are also made with indirect maximum power extraction control. Furthermore, the regulator of the GSC and RSC is set up so that the Network side converter Keeps up an unfaltering DC connect voltage and the RSC converter directs control. The d axis the rotor current maintains the reactive power demand of the DFIG, while q axis rotor current fulfill the reactive power demand. Similarly, the d-axis grid current maintains constant dc link voltage for wide variation of wind speed. The rotor-side and grid-side transducers are modeled separately to avoid erroneous results. The grid and rotor-side results from the rotor and stator circuits are shown to examine the energy exchange between the generator and the system during three (super synchronous, synchronous, and sub-synchronous) modes of operation.