Inclination of Fast Changing Currents Effect the Readings of Static Energy Meters

Abstract

Static energy meters can be forced to give misreadings due to conducted electromagnetic interference (EMI). In previous research cases lower and higher readings of static energy meters were observed. In this paper an overview of previously reported lab experiments is given and further analyzed. The various situations are showing errors in the energy readings with respect to a reference meter. Based on these findings measurements are done using a dimmer in combination with a series of compact fluorescent lightning (CFL) and light emitting diode (LED) lamps. This setup was powered using a non-distorted mains power supply created by a four-quadrant amplifier combined with a line impedance stabilization network (LISN) to create a stable line impedance. The setup creates a pulsed current waveform with a short rise time. By using various line inductances the slope of the pulse is lowered and a correlation between the inclination of the slope and the deviations of the static meters is shown.