Stabilizing control for long-term low damping oscillation in multi-regional power system

To analyze and solve the problem of long-term low damping oscillation phenomena, a method is presented to find the best allocation and to design a power system stabilizer (PSS) for damping inter-area power oscillations. The method is based on the single-machine-infinite-bus models derived from the multi-machine power system by coherency-based reduction technique. Dynamic simulations using a 10-machine power system model are presented in order to show the effectiveness of the PSS designed according to the proposed method.