Abstract:
Due to rapid increase in the installation of renewable energy resources into the grids, the
use of power electronics-based devices are increasing day by day. Whenever a Wind Farm is installed and integrate with the grid, most of work and control depends on its electronic converters. For this reason, the control and modeling of large wind turbines is a prominent challenge in modern power systems. And whenever grid fault occurs, it can cause significant overcurrent and over voltages, placing the entire facility at risk. It quickly
causes the converter system to deteriorate if countermeasures were not taken. So, a proper protection scheme is needed to protect the generator and its converter from faults Thus, accurate modeling of Doubly-fed induction generator (DFIG) along with its control is
desperately needed. In this thesis, modeling, control, steady-state validation of DFIG and
proper protection scheme are presented. Faults analysis and protection scheme are
presented in which asymmetrical and symmetrical faults are created and then check its
effects on DFIG, rotor circuit and converters. Then a proper protection scheme of
Crowbar circuit is designed and check its operation on 1.5MW DFIG based Industrial
Wind Turbine model (FFCEL) in EMTDC/PSCAD. To constant DC-link voltage and to
produce the maximum power from the wind speed, the vector control technique is
designed for both stator and rotor side converters. The simulations are done in
EMTDC/PSCAD, and the results were carried out on 1.5MW DFIG of FFCEL Wind
Turbine and then validate with the actual data.
