A Novel Fuzzy Logic Based Power System Stabilizer for a Multimachine System

Due to increasing size and complexity of electric power systems. there has been an increasing interest in stabilization of such large-scale power systems. In the past fixed gain controllers were effectively used for damping out the low f r e quency oscillations. These stabilizers are designed based on linearized model of power systems for a particular operating and system condition. They are unable to mainbin their perfonnance in constantly changing operating conditions of highly non-linear, interconnected power systems of tcday. They are also not very effective in damping out the characteristic multiinodal oscillations of interconnected system.