Improved power quality monitoring kWh-meter

Pekka Koponen, Seppo Vehviläinen

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


    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
    EditorsRyszard Pawełek, Ryszard Klempka
    Place of PublicationŁódź
    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 Sept 200121 Sept 2001


    Conference6th International Conference Electrical Power Quality and Utilisation-EPQU'01


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