Results 261 to 270 of about 1,003,464 (309)

Estimation of Wind Penetration as Limited by Frequency Deviation

IEEE Transactions on Energy Conversion, 2006
Wind power fluctuations cause frequency deviation from the 60-Hz standard. Using the composite transfer function G (fw) of a small system of thermal power plants, it is estimated that power fluctuation of 5% of the total thermal plant capacity can be tolerated without exceeding 1% frequency deviation. The technology to filter out the power fluctuations
null Changling Luo, H.G. Far, H. Banakar, null Pin-Kwan Keung, null Boon-Teck Ooi   +4 more
openaire   +1 more source

Deviation-free Bragg cell frequency-shifting

Applied Optics, 1981
A method is described of applying a variable frequency-shift to a laser beam, by means of Bragg cells, in which the direction of the output diffracted beam is unaffected by the magnitude of the applied shift. Applications of the technique to reference-beam and Doppler-difference forms of laser anemometry are discussed together with methods of obtaining
J B, Abbiss, W T, Mayo
openaire   +2 more sources

Frequency response model considering large frequency deviation

2015 International Conference on Industrial Instrumentation and Control (ICIC), 2015
Large frequency deviation affects the output of auxiliary equipment of thermal power plant, which in turn will impact the operational security and stability of thermal power plant. This paper focuses on analyzing the relationship between out power and frequency of auxiliary equipment.
null Yuzheng Xie, null Hengxu Zhang, Huadong Sun, null Shiyun Xu   +3 more
openaire   +1 more source

Wide-Deviation Frequency-Modulated Oscillators

Proceedings of the IRE, 1948
Instantaneous frequency and power relations in wide-deviation frequency-modulated oscillators are discussed with special reference to the oscillators used in particle accelerators. There are no fundamental limitations on deviation and modulating frequency in the present range of interest, but a fluctuating load effect arises which may be of importance.
E.M. Williams, L. Vallese
openaire   +1 more source

Frequency-deviation method and apparatus

The Journal of the Acoustical Society of America, 1979
A carrier wave having a sub-audible frequency is modulated in amplitude by a modulating wave of a tone signal having an audible frequency, which produces a resultant modulated output signal having first and second side band components respectively deviated above and below the tone signal frequency by a deviation amount equal to the carrier frequency ...
openaire   +1 more source

Impact of frequency deviations protection functions

2009 62nd Annual Conference for Protective Relay Engineers, 2009
Before 2003 blackout, protection engineers didn't pay much attention to this phenomenon; it was not even part of relay acceptance testing. However, multiple nuisance trips during this blackout, forced system operators to look at this problem and re-evaluate relay performance for such conditions.
Ilia Voloh, Dale Finney, Mark Adamiak
openaire   +1 more source

A method for detecting a fine frequency deviation

Proceedings of MILCOM '96 IEEE Military Communications Conference, 2002
The paper considers the effect of a fine frequency deviation generated in a transmission channel on the performance of an adaptive equalizer. We describe a channel model with a frequency deviation and investigate how the equalizer is adapted to the channel.
Y.W. Kim, K.H. Park
openaire   +1 more source

An oscillographic method of measuring frequency deviation of frequency-modulated signals

Measurement Techniques, 1960
The above investigations have shown that the proposed oscillographic method is suitable for measuring large deviations (over 100 kc) with modulation indexes exceeding 10 and carrier frequencies up to 7·109 cps; under these conditions the error of measurement is less than 1%. The equipment required for measurements by this method is simple and available
P. A. Shpan'on, N. B. Petrov
openaire   +1 more source

A mobile standard of frequency deviation unit in frequency modulation signals

Proceedings of 20th Biennial Conference on Precision Electromagnetic Measurements, 2002
A mobile standard of frequency deviation unit designed for the verification of reference and working instruments measuring the parameters of signals with angular modulation is described.
Y.F. Pavlenko, V.I. Ogar, A.I. Kolbasin, S.P. Shpanion   +3 more
openaire   +1 more source

The Frequency Distribution of the Deviations in Static Perimetry

1985
The outcomes of repeated measurements in quantitative static perimetry scatter around a mean value. We analysed the frequency distribution of the deviations of the single measurements from their means.
Josef Flammer, Mario Zulauf
openaire   +1 more source