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Excitation Systems Performance witn Motor-Driven Exciters
Transactions of the American Institute of Electrical Engineers, 1950Two criteria of satisfactory systems performance are the ability of the main generator to retain stability and the ability of the exciter set to recover after a disturbance. Normal emergency throw-over times are generally between one and two seconds. This study indicates that for these throw-over times a very substantial margin in system performance ...
A. G. Mellor, M. Temoshok
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Excitable chemical reaction systems I. Definition of excitability and simulation of model systems
Journal of Mathematical Biology, 1975Using a computer program based on the well-known Crank-Nicolson method, a number of onedimensional chemical reaction-diffusion systems showing “regenerative excitability” are simulated, both on a finite interval and on a circle. Hereby several phenomena known from nerve physiology as travelling trains and pulse omissions have been reproduced.
Karfunkel, H. R., Seelig, F. F.
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Generator over excitation capability and excitation system limiters
2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194), 2002Sometimes, power system events have shown the need for generators to operate in the overexcited region to support stable operation. Operation up to, and transiently beyond, the overexcited limits from the capability curve is sometimes required.
A. Murdoch +4 more
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Theory of resonantly excited high-density excition systems
Journal of Luminescence, 1988Abstract Optical spectra of resonantly excited high density exciton systems, self-consistently calculated on the basis of a recently developed many particle theory, are presented.
W. Schäfer +3 more
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Excitation transfer in disordered systems
1981Disorder profoundly affects excitation transport in solids. Plane wave solutions lose relevancy, and marked departures from conventional band transport can occur. In particular, in the limit of strong disorder, the wave functions of an otherwise pure crystal become localized. At zero temperature, transport becomes impossible.
T. Holstein, S. K. Lyo, R. Orbach
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Discussion: Excitation system redundancy
2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008Today, technology continues to evolve as more functionality is placed into smaller packages with the aid of new innovative hardware and improving software in digital excitation systems. The advancement of the microprocessor has provided the means to increase the feature function capacity into less hardware and provide additional means to enhance ...
Richard Schaefer +5 more
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The brushless excitation system
Electrical Engineering, 1960A NEW TYPE of excitation system has been developed for use in the electric utility industry in which the generator collector and collector brushes, and the exciter commutator and commutator brushes are eliminated. The basic difference between this system and its predecessors is an a-c exciter mounted on the same shaft as the generator field.
R. W. Ferguson, R. Herbst, R. W. Miller
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Brushless Thyristor Excitation Systems.
IEEE Transactions on Power Apparatus and Systems, 1972This paper shows how brushless thyristor excitation systems for large synchronous generators are being evolved in the authors' organisation, outlines the electrical and mechanical advantages that accrue, and includes some results of a digital computer comparison of such systems with other forms of excitation.
W. Wright, R. Hawley, J. Dinely
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1987
The structure and dynamics of weakly bound molecular systems are often characterized by low potential barriers and large tunelling probabilities. Similar effects can be observed for molecules with internal motions, especially if these molecules are excited to energies near to or over above the barriers.
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The structure and dynamics of weakly bound molecular systems are often characterized by low potential barriers and large tunelling probabilities. Similar effects can be observed for molecules with internal motions, especially if these molecules are excited to energies near to or over above the barriers.
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Retrofitting static exciter regulators for rotating exciter systems
Conference Record of Annual Pulp and Paper Industry Technical Conference, 2003The author reviews the various rotating exciter systems and their retrofitting to new static exciter excitation equipment. It is noted that, where rotary exciter rewinding and general excitation system upgrading is considered, the shunt static exciter regulator represents an attractive alternative to power plant life extension.
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