Power quality improvement by controlling the Grid Side Converter of a wind system based on a DFIG

The main goal of this article is the control of a Wind Energy Conversion System (WECS), equipped by a Doubly Fed Induction Generator (DFIG), for maximum active power generation and power quality enhancement, in terms of reactive power compensation. The control strategy is applied to the DFIG whose rotor is connected to the grid through two converters (the RSC and the GSC). In fact, the main goal of the Rotor Side Converter (RSC) control is to accomplish simultaneously the capture of the optimum power from the wind and to ensure a unity power factor at the stator side. While, the aim of the Grid Side Converter (GSC) control is to ensure simultaneously a sleek DC bus voltage between the two converters and to compensate the reactive power of a lagging linear load coupled at the Point of Common Coupling (PCC) and achieve a unity power factor at the grid side. The presented simulation results show the Success of the different control strategies applied to the WECS.