Observer-Based Stabilizer of A single Machine Power System with Lossy Transmission Line

This paper proposes a stabilizing controller for single machine power system with nonzero conductance of transmission line. The proposed controller uses a reduced order observer to estimate the power angle of the system. The stability of the reduced order observer and that of the closed loop system incorporating the observer based stabilizer are given based on Lyapunov direct method. Simulation results included in the paper demonstrate the efficacy of the proposed stabilizer. The comparison with a classical type confirms the advantage of the proposed controller. Key-Words: -single machine power system, lossy transmission, line-reduced order observer, Lyapunov direct method.