Adaptive and coordinated oscillation damping control using measurement-driven approach

One of the main drawbacks of the existing oscillation damping controllers is that they are designed based on offline simulations for assumed system conditions and are not adaptive to the varying power system operating conditions. With the increasing availability of wide-area measurements and the rapid development of system identification techniques, adaptive oscillation damping controllers can be designed, which can coordinate the control provided by the available actuators and effectively damp targeted oscillation modes. An adaptive and coordinated oscillation damping control using measurement-driven approach is proposed in this paper. The subspace state space model is identified using ambient data or ringdown data to update the parameters of damping controller. Additionally, an adaptive time delay compensator employing a lead-lag structure is utilized to reduce the impact of random time delay. The coordinated control for different oscillation modes is achieved by mode decoupling control through selecting observation signal and actuation signal with minimum interaction with other modes. The demonstration on hardware testbed has illustrated the effectiveness of the proposed adaptive and coordinated damping controller.