DEVELOPMENT OF A POWER ANALYZER

Ana M. R. Franco, Endre Tóth, Rosane M. Debatin, Ricardo Prada

Abstract

These paper gives an account on a new power and energy measuring system, based on digital sampling, that was developed by the National Institute of Metrology (INMETRO) of Brazil. The goal of the project was to achieve the highest possible accuracy at line frequency (50 or 60 Hz), even in the presence of considerable harmonic distortions, to guarantee full traceability and to minimize the costs of obtaining a high quality reference system. In the new system the programmable A/D converters of two advanced digital multimeters (Hewlett-Packard 3458A) are used to measure the voltage and current simultaneously, by sampling method. The main advantage of the system is the high accuracy, full traceability to national standards within the country, and the possibility to calibrate watt-converter and watt-hour standards also in the presence of harmonics.

Keywords

sample methods, power, energy, harmonics

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IMEKO-TC4-2001-131.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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