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In present time the power demand increases more rapidly in the power generation and transmission and distribution system sectors. For maintaining the power system stability and steady state operation of power systems causes from disturbance, faults and suddenly changing of the load, voltage instability, voltage swell, voltage sag, harmonics, and change in frequency, stability is the most important factor for the power systems. Due to instability, different problems occur in power systems such as fluctuation in voltage and frequency, which may cause damage or failure of power systems.

This article presents taxonomical survey on optimization techniques for enhancement system performance by FACTS controllers such as Thyristor Controlled Series Capacitor (TCSC), Thyristor Controlled Phase Angle Regulator (TC-PAR), Static VAR Compensator (SVC), Dynamic Voltage Restorer (DVR), Sub-Synchronous Series …