Fuzzified Philip_Heffron model power system stabilizer for improvisation of Voltage stability

The operation and stability of modern power systems involving the synchronous operation of a large number of generators is often threatened by electromechanical oscillations called power swings. High performance excitation systems (AVR) with damper are well suited to combat the loss of synchronism and maintain the steady state and transient stability of the generators in power system. Effort has been given to develop a robust co-ordinate AVR-PSS using a fuzzy logic controller for an effective improvement in the power system stability of a single and multi machine system. Here a fuzzified co-ordinated PSS has been used for the improvisation of Voltage stability of single machine system which can further be used for multi-machine system.