Assessment and analysis of wind energy generation and power control of wind turbine system

This study concerns the evaluation of wind power potential and the choice of a wind  turbine to be installed near Rabah Bitat international airport of Annaba. Furthermore, the performances of power control of this turbine are developed. For this, the wind  speed data measured by meteorological station of th e airport are used. At the first time, a statistical analysis of wind characteristics and the extrapolation of weibull  parameters are presented. Otherwise, the analysis of the power produced and the capacity factor led to the choice of the wind turbine Enercon E-82/2000 whose characteristics: Rated wind speed (13m / s), the cut-in wind speed (2.5m / s) and a rated power of 2000kW. Finally, the control of the active and reactive power, by  adaptive fuzzy gain scheduling of proportional integral controller is simulated using software Matlab/Simulink, studies on a 2 MW DFIG wind generation system.  Performance and robustness results obtained are presented and analyzed. Keywords: wind energy- wind speed- Weibull distribution-capacity factor-power  output. Évaluation et analyse de la production d'énergie éolienne et contrôle depuissances d'un système éolienCette étude concerne l‟évaluation du potentiel de la puissance du vent et le choix  d‟une éolienne à installer à proximité de l‟aéroport international Rabah Bitat de Annaba. En outre, les performances de la commande des puissances de cette  turbine ont été développées. Pour cela, des données de la vitesse du vent mesurées par la station météorologique de l‟aéroport sont utilisées. Dans un premier temps, une analyse statistique des caractéristiques du vent ainsi que l'extrapolation des paramètres de weibull sont présentées. Par ailleurs, l‟analyse de la puissance produite et du facteur de capacité a mené au choix de l‟éolienne Enercon  E-82/2000 dont les caractéristiques : vitesse nominale du vent (13m/s), vitesse de démarrage (2.5m/s) et une puissance nominale de 2000kW. Finalement, la commande des puissances active et réactive par un mécanisme d‟adaptation flou des paramètres du régulateur proportionnel intégral a été simulée sous  Matlab/Simulink, réalisés sur une éolienne de 2 MW. Les résultats des  performances et de robustesse obtenus sont présentés et analysés.Mots clés : energie éolienne-vitesse du vent-distribution de Weibull-facteur de  capacité-puissance produite

Robust Control of Doubly Fed Induction Generator for Wind Turbine Under Sub-synchronous Operation Mode

AbstractThis paper presents a modeling and a robust control of doubly fed induction generator for wind generation system. The whole system is presented in d-q-synchronous reference frame. The regulation of the electromagnetic torque, stator reactive power control and neuronal controller are applied in order to control the rotor currents of the DFIG. For to improve the controller robustness, the study is validated through simulation using software Matlab/Simulink, studies on a 1.5 MW DFIG wind generation system compared with conventional proportional integral controller. Performance and robustness results obtained will be presented and analyzed

The role of sintering additives on synthesis of cermets by auto-combustion

The purpose of this work is to decrease or eliminate porosities in SHS products with sintering additives. The Ti–C system has been synthesized for its advantages for refractory, abrasive and structural applications. We attempted to densify TiC by using Nickel addition; this metal is introduced through a secondary reaction 3NiO + 2Al. This mixture reacts exothermically and the heat is released according to 3NiO + 2Al → Al₂O₃ + 3Ni. So, the introduction of the Al₂O₃ diluent with the starting reactants is necessary because of the explosive character of the thermite reaction. Thus, doping method is finally used to fabricate materials by SHS method (self-propagating high temperature synthesis). Final products were analysed by X-ray diffraction and scanning electron microscopy

Synthesis of nanocrystalline NiAl by mechanically activated self-propagating high-temperature synthesis and mechanically activated annealing process

The mechanically activated self-propagating high-temperature synthesis (MASHS) technique and the mechanically activated annealing process (M2AP) were used to produce NiAl intermetallic compound. Rietveld analysis of X-ray diffraction data was used to characterize the mechanically activated powders, MASHS and M2AP end-products. Two-phase (B2+L12) nickel aluminide intermetallic compounds were synthesized by the mechanically activated volume combustion synthesis (MASHS). A single phase B2 NiAl was formed when mechanically activated annealing process (M2AP) was performed. Starting from a mixture of elemental pure powders, both M2AP and MASHS milling processes lead to nanostructured powders. Structural analysis deduced from the Rietveld refinement of X-ray diffraction patterns of NiAl compounds synthesized by SHS after a milling of 6 h show the formation of β-NiAl phase with a cell parameter a = (0.2885 ± 1.2618 × 10−4) nm. The average crystallite size is D = (44.6421 ± 2.4263) nm and the microstrains values are close to those of metallic alloys τ = (0.2142 ± 1.6186 × 10−2)%. Finally, scanning electron microscopy (SEM) was carried out to characterize the microstructure of end-products