Design of state estimators for controls of power systems

In this article, a detailed system state estimation design process is presented. The article focuses on the Weighted Least Square (WLS) method to provide the control systems the necessary system states, including bus voltage magnitudes and angles. In addition, an observability analysis is presented to illustrate the measurement condition required for the system states to be observable. Finally, a bad data detection and identification process is shown to detect and identify such bad data measurements for a necessary bad data elimination process. The robustness of the state estimation methods is also discussed with the application of the state estimation in power systems controls.