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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...
This paper proposes new and simple control method for a stand-alone doubly fed induction generator (DFIG) connected to unbalanced and nonlinear loads. This type of load causes harmonic distortion in the stator current and voltage. To solve this problem, a novel control method is proposed in the load side converter (LSC). In this method, instantaneous active and reactive power theory in stationary...
This paper presents modified Stator Voltage Oriented Control (SVOC) for Doubly Fed Induction Generator (DFIG) in wind turbines to reduce torque pulsation during unbalanced voltage dips, and current waveforms are also improved with the decreasing of harmonics. The proposed schemes utilize multiple PI controllers with anti-windup to obtain commanded rotor currents and also introduce extra commanded...
In order to utilize Doubly Fed Induction Generators (DFIGs) as primary power source of an isolated system, they must be able to regulate the voltage and frequency of the system, as well as ride-through faults. This paper proposes a new control strategy for a DFIG operating in an isolated power system, accomplished by a Dynamic Voltage Restorer (DVR) and a Supercapacitor Energy Storage System (SCESS),...
This paper presents a proposed control of a Wind Energy Conversion System (WECS) with active filtering function for non linear conditions. The Rotor Side Converter (RSC) controls the active and reactive power injected to the grid by the stator of the Doubly Fed Induction Generator (DFIG). The specified control of the Grid Side Converter (GSC) ensures simultaneously the DC link voltage regulation and...
This paper presents a modified direct power control (DPC) strategy for a doubly fed induction generator (DFIG) based wind power generation system under unbalanced grid-voltage conditions. The strategy is based on the investigation of the mathematic model and the composition of the instantaneous active and reactive power outputted by DFIG. It is found that, by applying a notch filter of two times of...
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