Power system dynamic stability can be evaluated through the analysis of transient oscillations that occur following significant system events. One of the earliest methods for this type of study is Prony analysis, which estimates the system's electromechanical modes. While previous studies have highlighted advantages of performing Prony analysis on data in the forward and backward directions, the proposed method does so simultaneously. As a result, signal poles corresponding to electromechanical modes can be distinguished from spurious poles more reliably. The method also produces a single mode estimate, where independent application in the forward and backward directions would produce two estimates for each mode. The method is validated using simulated and measured power system data.
Published: May 5, 2023
Follum J.D., M. Khan, F.K. Tuffner, and P.V. Etingov. 2022.Simultaneous Forward-Backward Prony Estimation. In Proceedings of the 55th Annual Hawaii International Conference on System Sciences, (HICSS 2022), January 3-7, 2023 Virtual, Online, 2022, 3518 - 3527. Los Alamitos, California:IEEE Computer Society.PNNL-SA-143353.