Review of Power System Stabilizer: Application, Modeling, Analysis and Control Strategy

A Power System Stabilizer (PSS) is the most cost effective approach of increase the system positive damping, improve the steady-state stability margin, and suppress the low-frequency oscillation of the power system. A PSS has to perform well under operating point variations. Some of the major issues in the application of PSS are the choice of the input signal, the location of the PSS, the control algorithms and coordination with flexible AC transmission system (FACTS) devices. This paper presents an exhaustive review of power system stabilizer in terms of operation, dynamics, and control technique. It also reviews various methods for optimal placement of PSS. Studies have shown that PSS are designed to provide additional damping torque without affecting the synchronizing torque at critical frequencies in order to improve power system dynamic stability.