Papers by rahab abderrezak
International Journal of Applied Power Engineering (IJAPE), 2019
In this paper, improved sonsorless direct power control (DPC) of three-phase rectifiers is presen... more In this paper, improved sonsorless direct power control (DPC) of three-phase rectifiers is presented. The new system are based on virtual flux (VF) and notch filter using Second Order Generalized Integrator frequency located loop SOGI-FLL estimator. In order to improve the VF-DPC performance of PWM rectifier, an improved observation method of virtual flux-linkage is proposed. To avoid the relevant problems of pure integrator, and to achieve the accurate observation of the grid voltage’s phase, (SOGI-FLL) are used to displace the pure integrator. Theoretical principles of this method are presented and discussed. These strategies are also investigated under disturbed grid voltage. A theoretical analysis of active and reactive power under a non-ideal source is clearly demonstrated. In order to calculate the compensated powers, the extraction of positive, negative, and harmonic sequences of voltage and current is needed and a multiple dual SOGI-FLL method is used for rapid and accurate ...
This paper proposes a new perspective in the contribution to the depollution of harmful harmonics... more This paper proposes a new perspective in the contribution to the depollution of harmful harmonics in the electric power distribution network. This perspective consists of using an eleven-level parallel active filter that reveals superior qualities to those of the conventional two-level active filter. The three-phase eleven-level inverter is equipped with a fuzzy controller, designed to keep the DC bus voltage constant. In order to effectively compensate the disturbances responsible of the performance degradation of the electrical equipment, the active filtering is treated according to an approach based on the use of the instantaneous active and reactive power method. Consequently the power factor unity, the sine wave current source and the minimal reactive power will be improved. The control strategy used to command the inverter switches is the ten-carrier PWM. This latter offers to the filtering operation a high stability and robustness in the various perturbations proposed in this work. The performed robustness tests clearly show the efficiency and the stability of the adopted approach for the SAPF, and this justifies the use of this type of filter in the field of high voltage and great power such as electrical traction.
In this paper, improved sonsorless direct power control (DPC) of three-phase rectifiers is presen... more In this paper, improved sonsorless direct power control (DPC) of three-phase rectifiers is presented. The new system are based on virtual flux (VF) and notch filter using Second Order Generalized Integrator frequency located loop SOGI-FLL estimator. In order to improve the VF-DPC performance of PWM rectifier, an improved observation method of virtual flux-linkage is proposed. To avoid the relevant problems of pure integrator, and to achieve the accurate observation of the grid voltage's phase, (SOGI-FLL) are used to displace the pure integrator. Theoretical principles of this method are presented and discussed. These strategies are also investigated under disturbed grid voltage. A theoretical analysis of active and reactive power under a non-ideal source is clearly demonstrated. In order to calculate the compensated powers, the extraction of positive, negative, and harmonic sequences of voltage and current is needed and a multiple dual SOGI-FLL method is used for rapid and accurate extraction. It is shown that the VFDPC with integrating notch filter exhibits several advantages, particularly providing small ripple of DC-link voltage and sinusoidal line current when the supply voltage is not ideal.
: 580. 1. Full text 2. Abstract/Details Turn on hit highlighting for speaking browsers by selecti... more : 580. 1. Full text 2. Abstract/Details Turn on hit highlighting for speaking browsers by selecting the Enter button Hide highlighting Abstract Translate Abstract The absence of brushes and slip rings makes the BDFM particularly attractive as a wind turbine generator as brush and slip ring problems in the widely used doublyfed induction generator (DFIG) have been identified as a principal failure mode of thesegenerators in wind turbines.
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Papers by rahab abderrezak