Dr. Kezunovic and Dr. Popovic co-authored a publication titled “Transmission line relay mis-operation detection based on time-synchronized field data” published in Electric Power Systems Research.

ABSTRACT: In this paper, a real-time tool to detect transmission line relay mis-operation is implemented. The tool uses time-synchronized measurements obtained from both ends of the line during disturbances. The proposed fault analysis tool comes into the picture only after the protective device has operated and tripped the line. The proposed methodology is able not only to detect, classify, and locate transmission
line faults, but also to accurately confirm whether the line was tripped due to a mis-operation of protective relays. The analysis report includes either detailed description of the fault type and location or detection of relay mis-operation. As such, it can be a source of very useful information to support the system restoration. The focus of the paper is on the implementation requirements that allow practical application of the methodology, which is illustrated using the field data obtained the real power system. Testing and validation is done using the field data recorded by digital fault recorders and protective relays. The test data included several hundreds of event records corresponding to both relay mis-operations and actual faults. The discussion of results addresses various challenges encountered during the implementation and validation of the presented methodology. [link]

Kezunoivc, along with his co-authors Sakis Meliopoulos (Georgia Tech), Vaithianathan Venkatasubramanian (Washington State University), and Vijay Vittal (Arizona State University), wrote the book titled “Application of Time-Synchronized Measurements in Power System Transmission Networks.” The focus of the book is an overview of the new most critical power system applications during disturbances: state estimation, voltage stability, oscillation monitoring, transient stability and fault location. The book, which was published by Springer in the Series of Power Electronics and Power Systems, was created through the “Future Grid Initiative” funded by the DOE under a grant to the National Science Foundation’s (NSF) Power Systems Engineering Research Center (PSERC).

During May 2014, Dr. Kezunovic gave invited talks at the University of Rome La Sapienza in Italy, University of Split in Croatia, and University of Ljubljana in Slovenia. The title of this IEEE Distinguished Lecture was “Flexible Load: why, when and how.”

The University of Ljubljana in Slovenia (image: Wikipedia)