Results 281 to 290 of about 2,645,417 (346)

Mesoscopic Voltage Fluctuations in Luttinger Liquids

Physical Review Letters, 1997
In this Letter, the mesoscopic voltage and conductance fluctuations of a Luttinger liquid are examined. For quasiballistic wires, one finds that the amplitude of conductance fluctuations, i.e., $\mathrm{Var}(G)$, is proportional to ${T}^{4g\ensuremath{-}5}$ where $g\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}\ensuremath{\pi}\ensuremath{\Elzxh}v(\
Scot R. Renn, Daniel P. Arovas
openaire   +1 more source

Voltage Fluctuations in Lamps and Ballasts

IEEE Industry Applications Magazine, 2011
This article shows that lamp aging has a significant correlation with flicker generation. In this research work, a test system and a methodology able to measure optical fluctuation produced by different types of lamps and ballast are presented. This experimental platform provides a correlation between voltage flicker levels and optical flicker ...
Francisco Azcondo, M. Manana, A. Ortiz, F.J. Díaz, C. Brañas, C. Renedo, S. Pérez, F. Delgado, R. Casanueva   +8 more
openaire   +1 more source

Voltage Fluctuations in a Diode

Physical Review, 1968
A thermodynamically consistent microscopic model is used to derive a Fokker-Planck equation governing voltage fluctuations across a diode in the limit of small electron charge. In going to this limit, strong nonlinearities in the diode current characteristic are allowed to persist for voltages in the range of the thermal fluctuations.
openaire   +1 more source

Fluorescent lamp modelling for voltage fluctuations

European Transactions on Electrical Power, 2001
AbstractThe wide use of fluorescent lamps means their influence on the power system needs to be studied. A set of models that enables the evaluation of the electrical behaviour during steady state is presented in this paper. These models have different levels of complexity; starting by taking into account all the non‐linearities of the lamp, passing ...
C. Carrillo, J. Cidrás
openaire   +1 more source

Voltage fluctuations and flicker

2001
Changes in the amplitude of a voltage for a period which is longer than the period of the voltage under consideration is designated a voltage fluctuation. Such voltage fluctuations can occur once, several times, randomly or regularly. The voltage fluctuation in the form of a jump, a ramp or any quasi course is described by the value of the relative ...
openaire   +1 more source

Wind turbine effects on power system voltage fluctuations

2013 3rd International Conference on Electric Power and Energy Conversion Systems, 2013
Every passing day wind energy becomes more indispensable part of power systems. So this increasing require the analysis of wind turbine impact on the grid. In this study, possible effect of wind turbine which is connected to Turkish distribution grid are analyzed.
Kılıçkıran, Hasan Can, Erduman, Ali, Kekezoğlu, Bedri, Tanrıöven, Muğdeşem, Durusu, Ali   +4 more
openaire   +2 more sources

Limiting low frequency interharmonic distortion and voltage fluctuations

IEEE PES General Meeting, 2010
Limiting low frequency interharmonic distortion and voltage fluctuations is considered. Reference is made to recent activities in the standard review process and to research literature regarding this specific topic and related issues. Some recalls on the main low frequency interharmonic voltages effects are reported.
LANGELLA, Roberto, TESTA, Alfredo, EMANUEL A.   +2 more
openaire   +2 more sources

Determination of the parameters of voltage variation with voltage fluctuation indices

2016 17th International Conference on Harmonics and Quality of Power (ICHQP), 2016
A set of parameters that describe the quality of power in power grids includes several measures of voltage variation. Among these measures are the voltage fluctuation indices, composed of magnitude, δU, and rate, ƒ, of fluctuations. This paper provides an example of the use of this measure to reconstruct the voltage changes.
Mateusz Michalski, Grzegorz Wiczynski
openaire   +1 more source

Voltage fluctuations in Josephson tunnel junctions

Physica B+C, 1981
Abstract Starting from microscopic theory of the Josephson tunnel junctions, the general expression for the power spectrum of small voltage fluctuations SV(ω) is obtained. According to this expression, SV(ω) could be considered as a result of parametric conversion of “original fluctuations” at composite frequencies ωn=ω+nωv ( ω v = 2 e V
openaire   +1 more source

Voltage induced capacitance fluctuations in a compressed gas, high voltage capacitor

Journal of Physics E: Scientific Instruments, 1975
Capacitance fluctuations of the order of a few parts/million have been observed in a 330 kV capacitor after operating at 300 kV for 30 min. It has been concluded that the capacitance fluctuations are due to convection of the compressed CO2 gas, caused by dielectric heating of the insulating walls.
J Rungis, D E Brown
openaire   +1 more source