An international comparison of 50/60 Hz power (1996-1999)

Oldham, N.M.; Nelson, Thomas L.; Bergeest, R.; Ramm, G.; Carranza, R.; Corney, A.C.; Gibbes, M.; Kyriazis, G. A.; Laiz, H.; Liu, L.X.; Lü, Zhiguo; Pogliano, U.; Rydler, Karl-Erik; Shapiro, E. Z.; So, E.; Temba, Moses; Wright, P.S.

doi:10.1109/19.918141

Cited by 20 publications

(2 citation statements)

References 14 publications

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“…The new analytical expression for measurement uncertainty in a measuring of RMS… supposition that the initial moment of measuring is synchronized with the zero crossing of the signal (t 0 =0). The errors in the AC voltage measurement were compared with those given in [9], and were in good agreement.…”

Section: Error Of Synchronous Sampling In the Case Of Nonideal Synchr...mentioning

confidence: 62%

The new analytical expression for measurement uncertainty in a measuring of RMS value of AC signals as result of non ideal synchronization

Petrovič

2006

Serb J Electr Eng

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Synchronous sampling allows alternating current (AC) quantities, such as the root mean square (RMS) values of voltage and power, to be determined with very low uncertainties (on the order of a few parts of 10-6 [1]). In this a new mathematical expression for estimating measurement uncertainties in non ideal synchronization with fundamental frequency AC signals is presented. The obtained results were compared with those obtained with a high-precision instrument for measuring basic AC values. Computer simulation demonstrating the effectiveness of these new expression, are also presented

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Section: Error Of Synchronous Sampling In the Case Of Nonideal Synchr...mentioning

confidence: 62%

The new analytical expression for measurement uncertainty in a measuring of RMS value of AC signals as result of non ideal synchronization

Petrovič

2006

Serb J Electr Eng

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“…Several international comparisons [5,6] of various power standards of national metrology institutes (NMI) have been conducted between the world's metrology regions using as a travelling standard the ac-power-to-dc-voltage converter MSB [7]. Although different methods are used for measurement of ac power (use of a thermal power comparator or current-comparator-based power bridge, power calculated from data obtained by sampling), all of them include the state-of-the-art of the NMI to measure the ac resistance.…”

Section: Measurements and Estimation Of The Uncertaintiesmentioning

confidence: 99%

High precision calibration of ac current-to-voltage converters

Miljanić¹

2004

Metrologia

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A two-stage transformer, built as a current comparator with a shielded magnetic core, is used to make a novel ac bridge for calibration of ac shunts for large currents and other ac current-to-voltage converters. A fine adjustable reference transresistance is made by current transformation and a non-reactive precision resistor connected to the secondary. By using an auxiliary transformer and resistor, all four two-stage transformer secondary terminals are brought to ground potential and consequently both magnetizing and capacitive errors are kept below one part per million.

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Changes in AC Power Standard in Japan

Shirai¹

2008

IEEJ Transactions Elec Engng

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The precise measurement of electric power will increase in importance because of the growth of power consumption and the deregulation of electric utilities. An electric power and energy calibration system was developed at the Japan Electric Meters Inspection Corporation (JEMIC) in 2004, and it was designated as the national electric power and energy standards in Japan in 2005 to replace the aging AC/DC watt comparator. The methods of establishing the electric power standard at foreign National Metrology Institutes (NMIs) can be classified roughly into a method by a sampling wattmeter, a method by the principle of the current comparator, and a method based on dual‐heater multijunction thermal converters. This article describes the transition of the electric power and energy standards in Japan and in foreign countries. Copyright © 2008 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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An international comparison of 50/60 Hz power (1996-1999)

Cited by 20 publications

References 14 publications

The new analytical expression for measurement uncertainty in a measuring of RMS value of AC signals as result of non ideal synchronization

The new analytical expression for measurement uncertainty in a measuring of RMS value of AC signals as result of non ideal synchronization

High precision calibration of ac current-to-voltage converters

Changes in AC Power Standard in Japan

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