On the value of estimated state uncertainty in distribution system state estimation

This paper investigates the importance of the estimation uncertainty in Distribution System State Estimation (DSSE). The study is carried out using data from a real implementation of DSSE in a medium-voltage distribution network in Switzerland, which is equipped with Distribution Phasor Measurement Units (D-PMUs). The study presents the computation of the uncertainty of state estimates and discusses the benefit of considering the estimated state uncertainty while analysing the DSSE results, which increases the reliability in correctly detecting key grid events, such as reverse power flows and line congestions.