CHARACTERIZATION ISSUE OF POWER QUALITY INSTRUMENTS

Daniele Gallo, Carmine Landi, Mario Luiso

Abstract

This paper analyzes some aspects related with metrological characterization of instrument for power quality monitoring in order to move a step toward the definition of a full performance verification protocol. This protocol should include not only test situations reported in related standards, but also an array of different voltage and current fluctuations - related to common Power Quality issues - that may be encountered in actual power systems. This performance analysis is particularly interesting because it can be found that different power quality instrument, fully meeting characteristics prescribed in standard, may still disagree significantly in some actual measurements. The aim of discussion carried out in the paper is also the specification of requirements of a test system devoted to calibration and verification of a PQ monitor such as it is done in type testing. After a preliminary discussion about technical and theoretical issues related to performance analysis of these instruments, a proposal of test protocol definition based on design of experiment is presented with reference to some PQ phenomena.

Keywords

power quality instrument, metrological characterization, experimental design

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IMEKO-WC-2009-TC4-604.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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