Improved power quality monitoring kWh-meter

Pekka Koponen, Seppo Vehviläinen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

We have developed a method for measuring power quality quantities such as voltage distortion, voltage unbalance and frequency from undersampled measurements. It is based on an adaptive state observer for the voltage phasors. The method, its implementation to an existing kWh-meter and experience is documented in previous papers. In this paper we show how to include also the measurements of individual harmonic voltage components, very short voltage dips and interruptions and the flicker indices. First we describe the adaptive state observer and its extension to measure individual harmonic components. Then we discuss the measurement of voltage flicker and short voltage dips as well as the requirements these set on the sampling rate and how to minimise the errors caused by sparse sampling. Also experience with these new meters is summarised.
Original languageEnglish
Title of host publication6th International Conference Electrical Power Quality and Utilisation-EPQU'01
Subtitle of host publicationProceedings
Pages217-224
Number of pages8
Publication statusPublished - 2001
MoE publication typeA4 Article in a conference publication
Event6th International Conference Electrical Power Quality and Utilisation-EPQU'01 - Cracow, Poland
Duration: 19 Sep 200121 Sep 2001

Conference

Conference6th International Conference Electrical Power Quality and Utilisation-EPQU'01
CountryPoland
CityCracow
Period19/09/0121/09/01

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