University of Twente Student Theses
Low Pass Filtering to Improve Robustness in Energy Measurements that Utilize Rogowski Coils
Mast, M.H. van (2021) Low Pass Filtering to Improve Robustness in Energy Measurements that Utilize Rogowski Coils.
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| Abstract: | —A low pass filter has been designed to improve robustness in energy measurements. The first order low pass differential filter design has been based around the requirement that the phase shift at 50 Hz is easily compensated with a phase calibration register in the energy metering IC. A water pump with dimmer is used as non-linear load. Results show that the measurement error can be as high as 714W above the actual power consumption of 23-25W without the use of a filter. This error has been reduced to 2 W with the filter installed. Changing the current channel gain has been shown to give a significant effect on the measured power. The current wave forms at these different gains show that the measuring error likely results from clipping. The pulsed current drawn by the non-linear load change to a saw tooth shape when the gain is raised. |
| Item Type: | Essay (Bachelor) |
| Faculty: | EEMCS: Electrical Engineering, Mathematics and Computer Science |
| Subject: | 53 electrotechnology |
| Programme: | Electrical Engineering BSc (56953) |
| Link to this item: | https://purl.utwente.nl/essays/94044 |
| Export this item as: | BibTeX EndNote HTML Citation Reference Manager |
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