Statistical Time-Domain Analysis of Equipment in Low-Voltage Networks

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Abstract

The increased use of non-linear equipment results in conducted electromagnetic interference problems. As an example, static energy meters, used to measure the energy consumption in households, show misreadings due to pulsed currents from a speed controlled water pump or dimmed lighting equipment. To determine the existence of similar equipment in low-voltage networks, this letter surveys current waveforms drawn by equipment in the low-voltage network. These waveforms are analyzed and compared to critical waveforms from previous research that caused static energy meter interference. In this way the extent of critical situations in a real-world environment is determined. The equipment survey is performed using a multi-channel timedomain measuring method able to capture the voltage and currents synchronously. Then using a time-domain parametric model a statistical overview of parameters such as the charge, crest factor, peak value, pulse duration, and rising slope is given. The survey shows the existence of a large variety of non-linear signals, and 43% contained critical parameters related to static energy meter interference.
Original languageEnglish
Number of pages4
JournalIEEE Letters on Electromagnetic Compatibility Practice and Applications
Volume3
Issue number4
Early online date11 Oct 2021
DOIs
Publication statusPublished - 11 Oct 2021

Keywords

  • Electromagnetic interference
  • Equipment survey
  • Non-linear
  • Static energy meter (SM)
  • Time-domain

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