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Articles 211 - 228 of 228
Full-Text Articles in Engineering
Analytical Investigation Of The Use Of Static Var Compensators To Aid Damping Of Inter-Area Oscillations, Arturo Roman Messina
Analytical Investigation Of The Use Of Static Var Compensators To Aid Damping Of Inter-Area Oscillations, Arturo Roman Messina
A. R. Messina
A comprehensive investigation of the use of Static VAR Compensators (SVCs) to aid damping of low-frequency inter-area oscillations in large interconnected power systems is presented. The study of inter-area oscillations and the design of controls is done using modal analysis of a linearized model of the power system. Based on this model an efficient algorithm to compute the power oscillation flow for each mode of concern is developed. This approach allows to identify the nature of oscillation patterns and provides important information needed in the application of SVCs. Controllability and observability measures are then used to assess the impact of …
A Fuzzy Simulation Model Of Basic Commutating Electrical Machines, D. K. Chaturvedi, P. S. Satsangi, P. K. Kalra
A Fuzzy Simulation Model Of Basic Commutating Electrical Machines, D. K. Chaturvedi, P. S. Satsangi, P. K. Kalra
D. K. Chaturvedi Dr.
Fuzzy Logic as applied to a great extent in controlling the process, plants and various complex systems, due to its inherent advantages like simplicity, ease in design, robustness and adaptivity. Aslo it is established that this approach works very well especially when the systems are not transparent. In this paper the approach is used for the modelling and simulation of an electrical machine to predict the behaviour of the machine under running conditionsas well as unde starting conditions. The starting characteristics of electrical machines are non-linear in nature, and it is very difficult to model them accurately. Also the developed …
Development Of The Industrial Expert System And Its Application For The Rational Choice Of Crushing And Grinding Facilities Of A Cement Factory (Développement Du Système Expert Industriel Et Son Application Pour Le Choix Rationnel Des Installations De Concassage Et De Broyage D'Une Cimenterie), Boukhemis Chetate , Cherif Kara, Galina Tcheremechko, Irina Merazka
Development Of The Industrial Expert System And Its Application For The Rational Choice Of Crushing And Grinding Facilities Of A Cement Factory (Développement Du Système Expert Industriel Et Son Application Pour Le Choix Rationnel Des Installations De Concassage Et De Broyage D'Une Cimenterie), Boukhemis Chetate , Cherif Kara, Galina Tcheremechko, Irina Merazka
Boukhemis Chetate
Les économies d’énergie électrique suscitent un intérêt croissant dans le domaine de l’industrie des matériaux de construction. En effet, la dépense en électricité peut représenter jusqu’à 50% de l’ensemble des coûts d’énergie nécessaires à la fabrication d’une tonne de ciment. Par ailleurs, environ 80% de l’énergie utilisée pour la fabrication d’une tonne de ciment est dépensée pour la fragmentation des matériaux de construction, c'est-à-dire pour le concassage et le broyage. Par conséquent, le choix rationnel des installations de concassage et de broyage et l’optimisation de leurs régimes de fonctionnement représentent un facteur important d’économies d’énergie. Toutefois, il est de plus …
Snow Pack Temperature Sensor, M. Shamshi, Raman Attri, V. Sharma
Snow Pack Temperature Sensor, M. Shamshi, Raman Attri, V. Sharma
Raman K. Attri
The study of snow hydrological characteristics plays the major part in forecast of snow-melt, snow run-off water of rivers, potential release of snow avalan'che and climatic changes. Increasing importance of study of snow hydrology has lead to the development of many snow sensors which monitors physical parameter of snow. Design of such snow sensors has been a difficult job because of harsh environmental conditions. This paper present the design considerations and performance characteristics of snowpack temperature profile sensing probe. This probe provides temperature gradient and temperature distributions within the snow-pack, and ground at different depths. The information on temperature distribution …
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
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
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.
Exoerience With The Analysis Of Small Signal Stability In Longitudinal Power Systems: A Case Study With The Mexican Interconnected System, Arturo Roman Messina
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
Ex Parte Letter In Fcc Notice Of Proposed Rules On Consumer Electronics Compatibility, Ron D. Katznelson
Ex Parte Letter In Fcc Notice Of Proposed Rules On Consumer Electronics Compatibility, Ron D. Katznelson
Ron D. Katznelson
No abstract provided.
Reply Comments To Fcc Notice Of Proposed Rules On Consumer Electronics Compatibility, Ron D. Katznelson
Reply Comments To Fcc Notice Of Proposed Rules On Consumer Electronics Compatibility, Ron D. Katznelson
Ron D. Katznelson
No abstract provided.
Comments Submitted To Fcc Notice Of Proposed Rules On Consumer Electronics Compatibility, Ron D. Katznelson
Comments Submitted To Fcc Notice Of Proposed Rules On Consumer Electronics Compatibility, Ron D. Katznelson
Ron D. Katznelson
No abstract provided.
Supplemental Reply Comments To Fcc Notice Of Inquiry On Consumer Electronics Compatibility Rules, Ron D. Katznelson
Supplemental Reply Comments To Fcc Notice Of Inquiry On Consumer Electronics Compatibility Rules, Ron D. Katznelson
Ron D. Katznelson
No abstract provided.
Reply Comments To Fcc Notice Of Inquiry On Consumer Electronics Compatibility Rules, Ron D. Katznelson
Reply Comments To Fcc Notice Of Inquiry On Consumer Electronics Compatibility Rules, Ron D. Katznelson
Ron D. Katznelson
No abstract provided.
Enhancement Od Dynamic Stability By Coordinated Control Of Static Var Compensators, Arturo Roman Messina, Brian C. Cory
Enhancement Od Dynamic Stability By Coordinated Control Of Static Var Compensators, Arturo Roman Messina, Brian C. Cory
A. R. Messina
No abstract provided.
Comments Submitted To Fcc Notice Of Inquiry On Consumer Electronics Compatibility Rules, Ron D. Katznelson
Comments Submitted To Fcc Notice Of Inquiry On Consumer Electronics Compatibility Rules, Ron D. Katznelson
Ron D. Katznelson
No abstract provided.
Possible Applications Of Neural Nets To Power System Operation And Control, P. K. Kalra, Alok Srivastava, D. K. Chaturvedi
Possible Applications Of Neural Nets To Power System Operation And Control, P. K. Kalra, Alok Srivastava, D. K. Chaturvedi
D. K. Chaturvedi Dr.
Problems related to power system operation and control are complex and time consuming because of the non-linearities involved in their formulation and solution. Fast solutions to these problems can be obtained only through parallel processing. Neural nets provide massive parallel processing facilities and may also be used efficiently to model systems with non-linearities. The capabilities of neural nets can, therefore, be well utilized in modelling and processing problems related to power systems. In order to reduce the burden on computers, algorithms involving optimization and complex equations can be converted to heuristics. These heuristics can then be represented in terms of …
Gain Enhancement Of Dielectric Resonator Loaded Waveguide Antennas With Dielectric Overlays, M. Hakkak, Hossein Ameri Mahabadi
Gain Enhancement Of Dielectric Resonator Loaded Waveguide Antennas With Dielectric Overlays, M. Hakkak, Hossein Ameri Mahabadi
Hossein Ameri Mahabadi
The gain characteristics of a dielectric resonator loaded coaxial probe fed circular waveguide antenna (DRLWA) with overlaying parasitic discs have been investigated experimentally. Results indicate that, when properly spaced, the overlays can enhance the gain by more than 6 dB.
"Power System Frequency Deviation Measurement Using An Electronic Bridge, Mukhtar Ahmad
"Power System Frequency Deviation Measurement Using An Electronic Bridge, Mukhtar Ahmad
Mukhtar Ahmad
No abstract provided.
A Digital Tachometer For Measurement Of Low Speeds, Mukhtar Ahmad
A Digital Tachometer For Measurement Of Low Speeds, Mukhtar Ahmad
Mukhtar Ahmad
No abstract provided.