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Markus de
Koster, Patrick Lehnen, Patrick Mack , Eberhard Waffenschmidt, Ingo Stadler,
Ahmad Bkira,
„Optimal Placement of Power Quality Monitors for Enhanced Observability with
Fewer Devices”,
Submitted for publication to CIRED 2025 Conference, Geneva, Switzerland, 16. - 19
June 2025, Paper 636.
This paper presents a power quality monitor placement method that balances observability with minimal
measurement devices. The approach constructs an affinity matrix capturing how transients, harmonics, and
voltage sags propagate through the network. By aggregating voltage and current data under varying thresholds, a
scree-plot analysis using singular value decomposition identifies the optimal number of monitors. Tests on
multiple grids demonstrate that only a few power quality monitors can capture the dominant variance.
Experimental results confirm improved harmonic state estimation when voltage monitors are placed at nodes far
from strong voltage sources and on less supported feeders and the opposite for current monitors. This method
considers various disturbance types, downstream tasks and scales more efficiently than existing methods.
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Thema
> Research Project QUIRINUS Control
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Exemplary power grid with power quality monitors (squares).
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