Results 291 to 300 of about 5,869,378 (346)

Robust Load Frequency Control

IFAC Proceedings Volumes, 1989
Abstract It is highly desirable that any control system is not affected by modeling errors or parameter variations of a controlled object. This paper presents an application of a robust feedback control system to load frequency control of an interconnected power system. In the design of this control system, parameter variations in a controlled object
E. Tanaka, J. Hasegawa
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All-optical frequency-controlled frequency switch

Journal of the Optical Society of America B, 2010
Orthogonally polarized optical feedback has been proven to act on the frequency of semiconductor lasers. The coupling of this feedback to a nonlinear filter results in bistability for the frequency of the laser output [Phys. Rev. Lett.94, 173902 (2005)].
T. Sorrentino, O. Di Lorenzo, L. C. de Oliveira, M. Chevrollier, M. Oriá   +4 more
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Frequency Control

Physics Today, 1951
Signal Corps sponsors ...
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Development Trends in Primary Frequency Control and Frequency Control Market

Power Technology and Engineering, 2020
The article reflects development trends in primary frequency control and frequency control market in Russia and foreign countries. These trends are related to the expansion of renewable energy sources and energy storage systems, in particular.
N. V. Zorchenko, A. G. Chaplin, O. V. Rad’kova, T. G. Tyupina   +3 more
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Frequency control symposium

Physics Today, 1959
On May 12, 13, and 14, 1959, the Thirteenth Annual Frequency Control Symposium sponsored by the Frequency Control Division of the US Army Signal Research and Development Laboratory was held at Asbury Park, New Jersey. Besides 700 participants of industrial, educational, and governmental organizations from the US, the Symposium was attended by a ...
G. K. Guttwein, H. H. Plotkin
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Controlling the Frequency

Science Signaling, 2000
Oscillations in calcium released from intracellular stores regulate cellular responses to increases in intracellular calcium concentration [Ca 2+ ] I . The amplitude of the calcium spikes can be independent of agonist concentration, but the frequency of the spikes is often a function of ...
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Frequency control developments

Physics Today, 1966
CRYSTAL VIBRATORS and atomic frequency standards are continuing to attract the interest of engineers and physicists. In particular, the energy-trapping concept has assisted in the application of theory to practical quartz resonators. Thus filter crystals have been extended to 125 MHz.
Arthur D. Ballato, Robert V. McKnight
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Optimal Decentralized Load-Frequency Control

IFAC Proceedings Volumes, 1984
Abstract An optimal decentralized load-frequency control of a multi-area intercon-nected power system is developed. It features the optimal design of decentralized load-frequency controller, the observer for unmeasurable local states and load disturbances, and ttie quadratic estimator for discrete tie-line power flow information.
Young M. Park, Kwang Y. Lee
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A magnetic amplifier frequency control

Electrical Engineering, 1950
TO SUPPLY power to certain types of shipboard instruments, a source of alternating current is required in which the frequency error must be ±0.1 per cent or less over a range of temperatures, loads, and supply voltages. This need has been met by the use of small motor-driven alternators which run on the ship's d-c power supply.
L. J. Johnson, H. G. Schafer
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Frequency control of load swings

Electrical Engineering, 1942
The Consolidated Edison Company made a series of tests to determine the cause and extent of system load swings on generators and tie feeders. The results were reported in detail in a previous paper.1 An analysis of these tests indicated ways in which our load dispatching methods could be improved.
J. E. McCormack, R. J. Lombard
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