Impact of Realistic Bus Frequency Measurements on Wide-Area Power System Stabilizers

The paper studies the dynamic response of a Wide-Area Power System Stabilizer (WAPSS) for damping inter-area oscillations. The WAPSS utilizes remote bus frequency measurements obtained with frequency estimations. The geometric approach is adopted for the selection of the most effective signal and input placement. Then, the suitability of Padé approximants to capture the impact of communication delays on signals observability is tackled. The results of the small-signal stability analysis are discussed through non-linear time domain simulations with inclusion of time-varying stochastic delays.