Development of intelligent Controllers for static var Compensator to suppress power Oscillations

Abstract

In power system interconnection by weak tie lines low frequency newlineoscillations are generated during disturbances These oscillations severely newlinerestrict the system operation and in some cases can lead to system blackout newlineSuppression of power oscillations during the disturbance condition is a major newlinechallenge in power system operation newlineConventionally Power System Stabilizers PSS are used to damp newlinethe oscillation In large power systems it is difficult to select the units for newlineinstalling PSS to damp power system oscillations In addition to that newlineparticipation factor corresponding to the speed deviations of the generators newlineare to be determined For placing the PSS for effective damping which need newlinemore evaluation using residues and frequency responses newlineWith the advancement in power electronics technology Flexible newlineAC Transmission System FACTS devices have been proposed to suppress newlinepower oscillations in power systems If the controllers of the FACTS devices newlineare properly designed for the automatic control the system oscillations can be newlinedamped out quickly newline newline