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An improvement for dual channel samplingwattmeter

Published online by Cambridge University Press:  17 December 2010

W. M.S. Wijesinghe  and
Y. T. Park
W. M.S. Wijesinghe*
Affiliation:
University of Science and Technology, Daejeon South Korea
Y. T. Park
Affiliation:
Korea Research Institute of Standards and Science (KRISS), Electromagnetics Group, Daejeon South Korea
*
⋆ Correspondence:wije@kriss.re.kr
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Abstract

We present a digital sampling algorithm that uses two high resolution integratingvoltmeters that are synchronized by a phase-lock loop clock to accurately measure theactive and apparent power parameters for sinusoidal power measurements. The developedsystem provides high precision measurements of the root mean square, phase and the complexvoltage ratio of the ac signal with sophisticated algorithm which process the data infrequency domain. The system was designed to be used at the Korea Research Institute ofStandards and Science as reference power standard for electrical power calibrations. Thedetail uncertainty calculations have shown that the accuracy of the measurements werebetter than 4 μW/VA (for k = 1) and the level ofuncertainty was valid for the power factor range 0 ~ 1 for both lead and lag conditions.The system is fully automated and allows power measurements and calibration of highprecision wattmeters and power calibrators at the main power frequencies of 50 and 60Hz.

Keywords

Electrical powersampling wattmeteruncertainty calculationdigital signal processingtraceability
Type
Research Article
Information
International Journal of Metrology and Quality Engineering , Volume 1 , Issue 2 , 2010 , pp. 59 - 65
Copyright
© EDP Sciences 2010

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References

Références

Toth, E., Franco, A.M.R., Debatin, R.M., Power and energy reference system, applying dual-channel sampling, IEEE Trans. Instrum. Meas. 54, 404 (2005) CrossRefGoogle Scholar
Pogliano, U., Use of integrative analog-to-digital converters for high precision measurement of electric power, IEEE Trans. Instrum. Meas. 50, 1315 (2001) CrossRefGoogle Scholar
Rammn, G., Moser, H., Andreas, A Newscheme for Generating and Measuring Active, Reactive and Apparent Power at Power Frequencies with Uncertainties of 2.5 × 10-6, IEEE Trans. Instrum. Meas. 48, 422 (1999) CrossRefGoogle Scholar
Ihlenfeld, W.G.K., Mohns, E., Dauke, K., Classical Nonquantum AC Power Measurements With Uncertainties Approaching 1 μW/VA, IEEE Trans. Instrum. Meas. 56, 410 (2007) CrossRefGoogle Scholar
Svensson, S., Rydler, K.-E., A measuring system for the calibration of power analyzers, IEEE Trans. Instrum. Meas. 44, 316 (1995) CrossRefGoogle Scholar
Klonz, M., AC–DC transfer difference of the PTB multijunction thermal converter in the frequency range from 10 Hz to 100 kHz, IEEE Trans. Instrum. Meas. 36, 320 (1987) CrossRefGoogle Scholar
R.L. Swerlein, A 10 ppm accurate digital ac measurement algorithm (Hewlett-Packard internal publication, 1991)
Kampik, M., Laiz, H., Klonz, M., Comparison of three accurate methods to measure AC voltage at low frequencies, IEEE Trans. Instrum. Meas. 49, 429 (2000) CrossRefGoogle Scholar
Kyriazis, G.A., Extension of Swerlein’s algorithm for AC voltage measurement in the frequency domain, IEEE Trans. Instrum. Meas. 52, 367 (2003) CrossRefGoogle Scholar
Guide to the expression of uncertainty in measurement, first edn. (International Organisation for Standardization, Switzerland, 1993)