Implementation of harmonic phase angle measurement for power quality instruments

2016 ◽  
Author(s):  
Ana Maria Blanco ◽  
Robert Stiegler ◽  
Jan Meyer ◽  
Michael Schwenke
Keyword(s):  
Power Quality ◽  
Phase Angle ◽  
Angle Measurement ◽  
Harmonic Phase ◽  
Quality Instruments

scholarly journals Harmonic phase angle as a concentration-independent measure of nanoparticle dynamics

2010 ◽  
Vol 37 (6Part1) ◽  
pp. 2587-2592 ◽  
Author(s):  
Adam M. Rauwerdink ◽  
John B. Weaver
Keyword(s):  
Phase Angle ◽  
Independent Measure ◽  
Harmonic Phase ◽  
Nanoparticle Dynamics

The Influence of Time Truncation on Phase Angle Measurement Principle

2014 ◽  
Vol 668-669 ◽  
pp. 957-960
Author(s):  
Na Na Chang ◽  
Hai Bao
Keyword(s):  
Fourier Transform ◽  
Steady State ◽  
Theoretical Calculation ◽  
Phase Angle ◽  
Measurement Data ◽  
Angle Measurement ◽  
Signal Phase ◽  
Measurement Principle ◽  
Dc Component ◽  
State Component

Real-time accurate voltage phase angle measurement data has a very important significance to monitor and analyze the power system, and phase angle measurement principle of Fourier transform plays an important role in the theoretical calculations and engineering applications. The dynamic sinusoidal voltage signal contains two parts of the sinusoidal steady-state component and decaying DC component, and the decaying DC component having a continuous spectrum, at the frequency corresponding to the sinusoidal steady-state component must have a non-zero value, making dynamic signal phase than steady signal phase has one extra deviation angle. Considering Fourier transform method and theory of engineering application are different, this paper only considered the application conditions of time truncation, analyzes continuous Fourier transform under a real eigenvalue and a pair of conjugate complex roots condition, then compared with the theoretical calculation, for the two case of limited time integration and theoretical calculation condition, the phase angle difference and influencing factors are given.

scholarly journals On The Relationships Among Different Voltage Unbalance Definitions

2021 ◽  
Author(s):  
Kshitij I Girigoudar ◽  
Daniel K. Molzahn ◽  
Line A. Roald
Keyword(s):  
Power Quality ◽  
Phase Angle ◽  
Distribution Systems ◽  
Relative Phase ◽  
Energy Resources ◽  
Distributed Energy ◽  
Line Voltage ◽  
Voltage Unbalance ◽  
Power Injection ◽  
Symmetrical Component

Growing penetrations of distributed energy resources (DERs) increase the power injection variability in distribution systems, which can result in power quality issues such as voltage unbalance. To measure unbalance, organizations such as IEC, NEMA and IEEE define phase unbalance in their power quality standards. However, the definitions in these different standards are not consistent, and voltages that are considered acceptable by one standard may violate good practices defined by another standard. To address this issue, this paper provides analytical comparisons of the most common voltage unbalance definitions, which are supplemented with numerical simulations. The analytical relationships suggest that it is possible to approximately bound the symmetrical-component-based voltage unbalance factor (which depends on the magnitude and relative phase angle) by limiting the line-to-line voltage unbalance, whereas applying line-to-ground voltage unbalance definitions neglects all information about phase angle offsets.

Role of phase angle measurement in electrical impedance spectroscopy

2013 ◽  
Vol 27 (4) ◽  
pp. 377-383 ◽  
Author(s):  
I. Cseresnyés ◽  
K. Rajkai ◽  
E. Vozáry
Keyword(s):  
Energy Dissipation ◽  
Impedance Spectroscopy ◽  
Phase Angle ◽  
Characteristic Frequency ◽  
Electrical Impedance ◽  
Angle Measurement ◽  
Electrical Impedance Spectroscopy ◽  
Impedance Method ◽  
Soil System ◽  
Current Frequency

Abstract Importance of phase angle measurement during the application of electrical impedance spectroscopy was studied by executing pot experiments with maize. Electrical impedance, phase angle (strength of capacitive character), and dissipation factor in the plant-soil system were scanned between 100 and 10 000 Hz current frequency. The frequency-dependent change in the phase angle could be described by optimum curves culminating within 920-3 650 Hz. Since the rate of energy dissipation is independent of root extent, the higher phase angle and lower energy dissipation were associated with the higher coefficient of determination achieved for the root electrical impedance - root system size (root dry mass and root surface area) regressions. The characteristic frequency selected on the basis of phase angle spectra provided a higher significance level at statistical comparison of plant groups subjected to stress conditions influencing root development. Due to the physicochemical changes observable in aging root tissue, the apex of phase angle spectra, thus the characteristic frequency, shifted continuously toward the higher frequencies over time. Consequently, the regularly repeated phase angle measurement is advisable in time-course studies for effective application of the electrical impedance method, and the systematic operation at the same frequency without determination of phase angle spectra should be avoided.

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