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Smart grid is a concept by which the existing electrical grid infrastructure is being upgraded with integration of multiple technologies such as, two-way power flow, two-way communication, automated sensors, advanced automated controls and forecasting system. Smart grid enables interaction between the consumer and utility which allow the optimal usage of energy based on environmental, price preferences...
This paper proposes two effective maximum power point tracking (MPPT) algorithms for two different wind energy conversion systems connected to the grid using permanent magnet synchronous generator (PMSG). The wind turbine (WT) is connected to the grid via back-to-back PWM-VSC for the first scheme, whereas, the WT is connected to the grid via diode-bridge rectifier, boost converter and the grid side...
This paper proposes a variable speed control scheme for grid-connected wind energy conversion system (WECS) using permanent magnet synchronous generator (PMSG). The control algorithm tracks the maximum power for wind speeds below rated speed of wind turbines and ensures the power will not go over the rated power for wind speeds over the rated value. The control algorithm employs fuzzy logic controller...
Résumé Les extraits des graines de la nigelle sont largement utilisés dans la médecine traditionnelle. Nous avons étudié l’effet de l’huile fixe de la nigelle sur les taux plasmatiques de la testostérone (T), de l’hormone folliculostimulante (FSH), de l’hormone lutéinisante (LH) et sur le poids corporel et celui des organes reproducteurs chez le rat. Vingt rats mâles ont été divisés en deux groupes...
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