Signal Model Adequacy Indicator for Measurements in LV Grids

The identification process for the parameters that characterize a deterministic signal is equivalent to a matching mathematical problem. The matching equation is based on the model of the physical phenomenon to which the signal is associated. The measurement process provides measurement results based on the matching of the observed signal and its associated (implicit) model. However, further aggregation in time of the measurement results might contribute to significant information loss when the variability of the measured quantity is significant within the analysis window and/or when the model introduces (invalid) approximations like the assumption of constant and equal to the rated value frequency in legacy power systems. In this paper, we propose to analyze such variability for common LV supply networks by introducing statistical metrics for standardized time intervals.