Handling Initial Conditions in Vector Fitting for Real Time Modeling of Power System Dynamics

This paper develops a predictive modeling algorithm, denoted as Real-Time Vector Fitting (RTVF), which is capable of approximating the real-time linearized dynamics multi-input multi-output (MIMO) dynamical systems via rational transfer function matrices. Based on generalization well-known Time-Domain (TDVF) RTVF suitable for online experience both initial-state decay contributions in measured output signals and concurrently active input signals. These adaptations were specifically contrived to meet needs currently present electrical power community, where low frequency system becoming an increasingly coveted tool by operators. After introducing validating scheme synthetic test cases, this presents series numerical tests high-order closed-loop generator IEEE 39-bus system.