Performance evaluation of different structures of power system stabilizers

The electric power from the system should be reliable and economical for consumer’s equipment satisfaction. An consists of many generators, transformers, transmission lines, loads, etc. For network, dynamic performance stability are important. is lost its by some disturbances i.e., load variations, generator failure, prime mover line outage, Whenever variations in system, rotor speed will vary, means oscillations speed, which deviating rated speed. excitation control voltage. When fault occurs at any unstable. If generator, oscillates. To reduce to make stable used stabilizers (PSS’s). Here, three types PSS’s PSS1B, PSS2B, PSS4B. Comparisons on multi machine under disturbance. From observations, concluding that PSS4B quickly physical parameters than other stabilizers.