Impact of Pseudo-Measurements From New Power Profiles on State Estimation in Low-Voltage Grids

Abstract

Low-voltage state estimation (SE) in distribution power system, because of lack of real-time measurements, must heavily rely on pseudo-measurements, primarily originating from standard load profiles (SLPs). Actual load profiles have been recently suspected of significantly deviating from the SLPs, and research work is ongoing to quantify and characterize this deviation and to synthesize more realistic profiles. The analysis of the propagation of error and uncertainty of load profiles in SE must be investigated, as distribution system SE in distribution is being experimentally deployed, and the use of any available source of data is under consideration. The findings provide hints on the accuracy to be expected and on corrections to be applied to classical pseudo-measurements.