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This paper deals with a comparative study between Proportional Integral (PI) and Sliding Mode in control of a doubly fed induction generator to feed power to the grid. Modeling of the DFIG in d-q frame reference is presented and the field-oriented strategy is applied. We use PI and sliding mode techniques respectively to control the rotor side converter (RSC) and the grid side converter (GSC). Simulation...
This paper proposes a new Direct Power Control (DPC) strategy for a single Voltage Source Converter (VSC) based Doubly Fed Induction Generator (DFIG) by employing Four Switch Three Phase Inverter (FSTPI) instead of Six Switch Three Phase Inverter (SSTPI). Reduce number of active switch not only improves reliability but also decreases cost, and conduction losses. The new switching table for FSTPI is...
This paper presents a modified hysteretic controller to improve Direct Torque Control (DTC) of the Doubly-Fed Induction Generator (DFIG) to achieve constant switching frequency and reduced torque and flux ripples. The proposed controller generates appropriate voltage vector with variable magnitude and angle, in order to reduce those ripples. The Space Vector Modulation is employed to apply the reference...
In this paper, the sliding mode control (SMC) based vector control is applied to a grid connected doubly fed induction generator (DFIG) based variable speed wind energy conversion system to improve the dynamic performances while controlling independently the generated active and reactive powers over traditional PI controller under different wind speed patterns. The robust performance analysis of SMC...
A new indirect power control strategy using modelbased predictive current control (MB-PCC) is presented in this paper for a doubly fed induction generator (DFIG) driven by an indirect matrix converter suitable for wind energy systems. In this paper the power reference is used to develop a new expression for the stator current in terms of the rotor current. A step by step methodology is presented to...
This paper presents a model predictive control technique for standalone doubly fed induction generators (DFIGs) without using position sensor. The technique uses a discrete-time model of the system to predict the future value of the rotor current for all possible voltage vectors generated by the rotor side converter (RSC). In this study, due to computational simplicity, the absolute error is selected...
This paper proposes a simple but very effective method to achieve the predictive direct power control (PDPC) for doubly fed induction generator (DFIG)-based wind energy conversion systems. The novel approach is able to operate at low switching frequency and provides excellent steady-state and dynamic performances, which are useful for high-power wind energy applications. Three vectors are selected...
This paper proposes the use of a novel three-phase PWM rectifier-inverter topology for doubly fed induction generator (DFIG) applications. The topology uses only nine IGBT devices for ac/ac conversion through a dc link. As compare to conventional back-to-back ac/ac converters, the numbers of power semiconductor switches are reduced in the suggested converter. The proposed topology results in reduction...
This paper proposes an enhanced predictive controller for direct power control of doubly fed induction generator (DFIG). In this paper, a control law based-on the transfer function model is described to compensate and regulate the differences between the output active and reactive power of stator of DFIG that is in interaction with the network. These methods directly investigate stator active and...
A simple and intuitive Doubly Fed Induction Generator (DFIG) predictive rotor current control scheme is presented. Predictive control of an Indirect Matrix Converter (IMC) is combined with predictive rotor current control of a DFIG to achieve a very good dynamic response as the rotor currents smoothly follow the applied reference in a ±30% range of the generator nominal rpm. Simulation results are...
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