phasor

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phasor

[′fāz·ər]
(physics)
A rotating line used to represent a sinusoidally varying quantity; the length of the line represents the magnitude of the quantity, and its angle with the x-axis at any instant represents the phase.
Any quantity (such as impedance or admittance) which is a complex number.
(solid-state physics)
A low-energy collective excitation of the conduction electrons in a metal, corresponding to a slowly varying phase modulation of a charge-density wave.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Using the PMU, synchronized phasor signals can be signified in (2) [6]
Phasor measurement units (PMUs) are indispensable tools for many applications in power systems, such as real-time voltage and current monitoring, protection, control, fault detection, and power quality monitoring, among others [1-3].
As an alternative to the traditional modeling approach [19, 20], dynamic phasor (DP) method is very useful for the harmonic analysis of SPVSC [21-23].
where | * | and [parallel] * [parallel], respectively, represent the modulo and Euclidean norm, [c.sub.j] is the jth line of the matrix C, [b.sub.k] is the kth column of the matrix B, [alpha]([W.sub.i], [c.sub.j]) is the angle between the output phasor [c.sub.j] and the right eigenvector [W.sub.i], and [theta]([N.sub.i],[b.sub.k]) is the angle between the output phasor [b.sub.k] and the left eigenvector [N.sub.i].
Fast voltagecollapse line protection algorithm based on local phasors. IEE Proceedings on Generation, Transmission and Distribution, 150 4, 482-486.
In order to eliminate the error caused by exponentially decaying dc offset on the computations of fundamental and harmonic phasors, an extended discrete Fourier transform algorithm is also proposed.
Since only the [xi]-th mode is excited, from (16), (7), (9) and (8), the phasors of the line electric quantities become:
A new fault locator for three-terminal transmission lines-using two-terminal synchronized voltage, current phasors. IEEE Trans Power Deliv 2002;17(2):452-9.