Abstract
In this paper, an adaptive version of the well known Phasor Power Oscillation Damper is presented. The proposed controller is adaptive in the sense that the phase compensation between the measured input and the applied control action is adjusted online during changing operating conditions. This is achieved through Multiple Model Adaptive Estimation, where a bank of Kalman filter estimators are run in parallel. A system model is inferred by assessing the performance of the individual filters, and used to update the tuning of the controller online. The proposed adaptive phase compensation scheme is compared with a similar scheme found in the literature, and is found to exhibit superior performance under the tested conditions. Simulation results from the Single-Machine Infinite Bus system, Kundur's Two-Area System and the IEEE 39-Bus System demonstrate that the proposed controller is able to adjust the phase compensation in response to severe non-linear events, and to eliminate phase lag due to communication latency.