Modelling and control of a variable speed wind turbine driving doubly fed induction generator using three–level PWM converter

The aim of this researcher is to develop a complete wind central model driven doubly fed induction generator (DFIG) which feeds an AC power grid. For that, two–pulse width modulated (PWM) voltage converters are connected back to back between the rotor terminals of DFIG and the utility grid via a common DC link, in there, our contribution will appear in the utilisation of three levels voltage inverters in order to ameliorate the energy quality. The simulation was carried out on a 2 MW wind–turbine driven DFIG system and the developed unified model validity and the proposed control strategies feasibility are all confirmed by the simulated results.

Keywords: variable speed wind turbines, PWM rectifiers, three–level voltage inverters, renewable energy, modelling, turbine control, induction generators, AC power grid, pulse width modulation, simulation, wind energy, wind power