Improved topology error detection via optimal measurement placement

Topology errors are known to significantly affect the performance of state estimators. There are methods which are developed for detecting and identifying topology errors based on the measurement residuals. However, the capability to detect and identify topology errors is related to the measurement locations and network configuration. In some cases, topology errors associated with certain branches can not be detected. The topology error detection capability can be improved by adding extra measurements at strategic locations. In this paper, this will be accomplished by using both phasor measurements and traditional measurements. It will be shown that a few extra measurements can drastically improve the capability to detect and identify topology errors in a given system. The proposed meter placement algorithm will be described and illustrative case studies will be presented.