ELECO 2009 Invited Talks

IMPACT OF PHASOR MEASUREMENTS ON STATE ESTIMATION Ali ABUR Department of ECE, Northeastern University, Boston, MA 02115, USA E-mail: abur@ieee.org Abstract – Synchronized phasor measurement units are quickly populating bulk power system transmission substations. These devices provide much needed time tags on measurements of voltage and current phasors, thus eliminating the age old time skew errors among measurements. Preliminary studies indicate that significant numbers of PMUs may be needed before state estimators can rely exclusively on these measurements for network solutions. It can however be shown that even when a relatively modest number of these devices are available for placement, certain benefits can be gained by their systematic placement. In this talk, we will review the issues related to placement of PMUs and impacts of strategic placement of these devices on the accuracy, robustness and bad data detection capabilities of state estimators.