Abstract: The study presents an approximate solution to the problem of low frequency oscillations of poorly damped power systems which has been a source of concern for engineers, since they limit the transfer of power in the transmission lines and induce tensions in the mechanical axis of the machines in the industrial. Due to small disturbances, power systems experience these poorly damped low frequency oscillations. Dynamic stability of power systems is also affected by these low frequency oscillations. With a suitable design of the Power System Stabilizer (PSS), these oscillations can be well cushioned and therefore, the stability of the system is improved. The basic functions of the PSS are to add a stabilizing signal which compensates for the oscillations of the excitation system voltage error during the dynamic/transient state and to provide a damping component when in phase with the speed deviation of the machine rotor. Studies have shown that PSS are designed to provide additional damping torque for different operating points of normal load, heavy load and leads to improved dynamic stability of the power system. Finally, we discuss some implementation issues, we study an illustrative example using MATLAB simulations and we, also point out possible generalizations of the (PSS) design.
Ruthber Rodriguez Serrezuela, Adrian Fernando Chavarro Chavarro and Carlos Alberto Perez Camacho, 2017. Design and Simulation of a Power Stabilizer System to Mitigate Oscillations of the Industrial Power System. Research Journal of Applied Sciences, 12: 424-429.