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Full-Text Articles in Engineering

Application Of The Industrial Expert System For The Choice Of The Electric Motors Of The Cement Factory Of Meftah, Algeria (Système Expert Industriel D’Aide Au Choix Des Moteurs Asynchrones En Cimenterie), Boukhemis Chetate , Cherif Kara, M. Fenneche Dec 1995

Application Of The Industrial Expert System For The Choice Of The Electric Motors Of The Cement Factory Of Meftah, Algeria (Système Expert Industriel D’Aide Au Choix Des Moteurs Asynchrones En Cimenterie), Boukhemis Chetate , Cherif Kara, M. Fenneche

Boukhemis Chetate

L’industrialisation en Algérie, qui a débuté dans les années 70, a été accompagnée par un choix non rationnel des installations électriques (surdimensionnement, pertes d’exploitation supérieures aux normes internationales, etc.). Aujourd’hui les pertes du réseau algérien de transport d’électricité et les normes de consommation (KWh/unité de production) sont supérieures aux normes en vigueur dans les pays industrialisés. Pour résoudre ces problèmes, il est nécessaire d’optimiser le fonctionnement des installations existantes en faisant appel aux technologies modernes, telles que l’intelligence artificielle et les moteurs électriques asynchrones à vitesse variable. Cet article présente un exemple d’application de ces techniques à la cimenterie de …


Load Forecasting Using Genetic Algorithms, D. K. Chaturvedi, R. K. Mishra, A. Agarwal Nov 1995

Load Forecasting Using Genetic Algorithms, D. K. Chaturvedi, R. K. Mishra, A. Agarwal

D. K. Chaturvedi Dr.

Genetic Algorithms (GAs) are gaining popularity in many engineering and scientific applications due to their enormous advantages such as adaptibility, ability to handle non-linear, ill defined and probabilistic problems. In this paper load forecasting problem on long term basis is formulated in the frame work of Genetic Algorithms. The results of GAs are compared with the central Electricity Authority (CEA) forecasted data to demonstrate the effectiveness of the proposed algorithms.


A Unified Topological Approach To Electromagnetic Environmental Effects Protection, George H. Baker, J. Philip Castillo, Edward F. Vance Jun 1995

A Unified Topological Approach To Electromagnetic Environmental Effects Protection, George H. Baker, J. Philip Castillo, Edward F. Vance

George H Baker

The presentation recommends an approach for unifying electronic system protection designs for a wide spectrum of electromagnetic environments. A general electromagnetic topological construct is developed as the basis for a consistent shielding and terminal protection methodology. Spectral characteristics of multiple interfering electromagnetic sources, both internal and external, are described. Effects addressed include EMI/EMC, lightning, nuclear EMP, and RF weapons. Protection practices for individual effects are discussed and means for integrating these into a single protection topology.


Exoerience With The Analysis Of Small Signal Stability In Longitudinal Power Systems: A Case Study With The Mexican Interconnected System, Arturo Roman Messina Jan 1995

Exoerience With The Analysis Of Small Signal Stability In Longitudinal Power Systems: A Case Study With The Mexican Interconnected System, Arturo Roman Messina

A. R. Messina

In this paper a fundamental study of the small signal stability characteristics of a longitudinal system representing a major equivalent of the Mexican power system is presented. The special characteristics of the Mexican system are emphasized and a number of studies regarding the nature and sources of low frequency oscillations are discussed. These studies reveal the emergence of an undamped swing mode #tvolving the interaction of several machines and their controllers spread out over a large geographical area. The influence of system structure and loading, load effect and the