Evaluation of the uncertainties in the measurement of distorted power by means of the IEN sampling system

Author

Pogliano, Umberto

Author_Institution

Electr. Metrol. Dept., Inst. Elettrotecnico Nazionale "Galileo Ferraris", Torino, Italy

Volume

55

Issue

2

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

620

Lastpage

624

Abstract

A method for the uncertainty evaluation in the measurement of power in distorted signals is described. The power is obtained by a sampling system, which acquires the voltage and current and computes the power from the harmonic components obtained by the best fit. An equivalent algorithm is applied to derive a simplified relation between the correlation matrix of the harmonics and that of the samples. The uncertainties are then evaluated by a model of the uncertainty of a single sample given by the manufacturer of the sampling voltmeters.

Keywords

calibration; correlation methods; harmonic distortion; measurement uncertainty; power measurement; signal sampling; voltmeters; IEN sampling system; correlation matrix; distorted power measurement; distorted signals; electrical measurement; electrical variables measurements; harmonic components; power quality; sampling voltmeters; uncertainty evaluation; Analog-digital conversion; Distortion measurement; Electric variables measurement; Frequency; Measurement uncertainty; Metrology; Power measurement; Sampling methods; Voltage; Voltmeters; Calibration; electrical measurement; electrical variables measurements; power quality; voltmeters;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2006.870129

Filename

1608610