Problem of Total Harmonic Distortion Measurement Performed by Smart Energy Meters
[ 1 ] Instytut Elektrotechniki i Elektroniki Przemysłowej, Wydział Automatyki, Robotyki i Elektrotechniki, Politechnika Poznańska | [ P ] employee
[2.2] Automation, electronics, electrical engineering and space technology
2022
scientific article
english
- harmonics
- Total Harmonic Distortion (THD)
- power quality
- voltage distortion
- voltage fluctuation
- AMI smart energy meters
EN Currently, electricity is treated as commodity that shouldbe delivered from a distributor to a consumer with a certain quality. The powerquality is defined by the set of measures with specific limit values. One of the basic measures is the Total Harmonic Distortion (THD), which allows to assess the level of the voltage distortion. The measurement of THD ratio should be carried out in accordance with thenormative specification. It is assumed that this requirement is met by class A power quality analyzers. Currently, measures are taken tomonitor power quality in a large number of measurement points with the use of smart energy meters that are part of the Advanced MeteringInfrastructure (AMI). The paper presents the problem of THD ratio measurement by AMI meters if voltage fluctuations occur. In suchsituation, inconsistency in measurement results of AMI meters and class A power quality analyzers occurs. The problem is presented on thebasis of laboratory study results in which disturbances in power grid are recreated.
21.01.2022
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