Abstract. This paper proposes a new control strategy to the grid side converter (GSC) of a DFIG-based wind turbine enabling the DFIG's FACTS features. This control strategy is based on the pq Theory which take advantage of this converter to improve the energy quality at the point of common coupling (PCC) acting as an active filter in the specific case adopted in this article. The control strategy of the rotor side converter (RSC) adopted was the classical field-oriented control which determines the active and reactive power that will be injected in the electrical system. Simulation results in PSCAD/EMTDC and some discussions are also shown throughout the paper.

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Abstract. This paper proposes a study about a partial islanding system composed by a wind turbine based on doublyfed induction generator (DFIG), a wind turbine based on permanent magnet synchronous generator (PMSG), an active filter, capacitor banks, non-linear load, and the grid power. Mathematical model of systems are performed by both fieldoriented control (FOC) and virtual grid flux oriented control (VOC). The objective is to analyze the voltage and frequency of point of common coupling (PCC) due to the islanding of gridconnected electrical power systems and then the insertion of the non-linear load on the system. In order to compare methods to improve the power quality in PCC the use of capacitor banks and active filter are considered in this work. The whole simulation model is developed in PSCAD/EMTDC environment. The simulation results are presented and discussed.