4 research outputs found
Gestion Optimale DâĂ©nergie dâune Chaine de Production Electrique Renouvelable
Le travail prĂ©sentĂ© dans cette thĂšse traite une mise en Ćuvre en temps rĂ©el d'une gestion d'Ă©nergie optimale d'un systĂšme de gĂ©nĂ©ration hybride Ă petite Ă©chelle. Le systĂšme est constituĂ© d'un module photovoltaĂŻque et une pile Ă combustible, soutenus par un rĂ©seau Ă©lectrique monophasĂ©, alimentant une charge autonome Ă courant alternatif. Deux algorithmes de gestion dâĂ©nergie basĂ©s sur la logique floue garantissent au systĂšme de passer intelligemment entre deux modes de fonctionnement, en fonction de la demande de la charge, le niveau du gaz, et la disponibilitĂ© de la source solaire sont prĂ©sentĂ©s. A cet effet, la pile Ă combustible et le rĂ©seau sont appelĂ©s Ă couvrir le manque signalĂ© par le module photovoltaĂŻque, qui dĂ©livre en permanence son maximum, via une MPPT par logique floue. En outre, la philosophie du SMART GRID est vĂ©rifiĂ©e, oĂč un Ă©coulement dans les deux sens de la puissance du rĂ©seau, est assurĂ© par les diffĂ©rentes lois de commande suggĂ©rĂ©es. Pour Ă©taler la faisabilitĂ© des lois de gestion proposĂ©es au systĂšme prĂ©sentant des anomalies, une commande tolĂ©rante au dĂ©faut capteur et systĂšme est ajoutĂ©e. Son architecture repose sur lâutilisation de deux observateurs (filtre de Kalman, Luenberger Ă mode glissant), dotĂ©e dâun algorithme de vote. Pour contrecarrer Ă la deuxiĂšme anomalie, une reconfiguration de la commande est alors suggĂ©rĂ©e via lâajout dâun mode de fonctionnement supplĂ©mentaire. Pour tester l'efficacitĂ© des algorithmes proposĂ©s, les rĂ©sultats expĂ©rimentaux obtenus avec un profil de charge donnĂ©e sont prĂ©sentĂ©s et commentĂ©s
Optimal energy control of a PV-fuel cell hybrid system
International audienceThis paper deals with a real time implementation of a fuzzy logic-based power management of a small scale generation hybrid power system. The system consists of a photovoltaic array and a fuel cell stack, supported by a single-phase grid that supplies a stand-alone AC load. The proposed supervisory algorithm guaranties the system to switch smart between two operation modes, according to the load demand, the gas level and the PV availability. Obviously, the PV side DCâDC converter is controlled to track permanently the maximum power point by using a fuzzy logic MPPT method; whereas, the fuel cell stack and the grid converters are tuned to cover the remaining power, or alternatively, injecting the exceeding power to the utility. Besides, to feed the AC load with a pure sine wave, a Back stepping algorithm is proposed to control the front-end single-phase inverter. To test the effectiveness of the proposed algorithms, experimental results obtained with a given load profile are presented and commented
Strategic Decision-Making in Sustainable Water Management Using Demand Analysis and the Water Evaluation and Planning Model
Water infrastructure management relies on information, communication strategies, and affordable technologies. This paper used demand analysis and modeling to guide strategic decision-making in sustainable water management for the urban cluster in Tlemcen, Algeria. To achieve this, the water supply and demand of the study area were assessed over the past three decades. The Water Evaluation and Planning (WEAP) system was employed considering different future scenarios to help decision-makers consider the best choices for sustainable urban water resources management. The results showed that the average water production and distribution efficiency was only 46% due to the high network loss. Therefore, urgent action should be considered to increase the efficiency of the distribution network. Moreover, the outcome showed severe unmet demand in 2050, which can be managed by improving the water networks, increasing conventional water production, and reducing personal water consumption. In cooperation with key stakeholders, new scenarios can be analyzed to develop efficient water management policies and to implement sustainable water allocation approaches