Design of power system stabilizers using two level fuzzy and adaptive neuro-fuzzy inference systems
This paper deals with a design of two level power system stabilizer. Former one is conventional, while the latter level is designed using one of the following two methods: fuzzy inference system (FIS) and adaptive neuro-fuzzy inference system (ANFIS). The main function of the conventional level is to stabilize unstable or poorly stable systems, while the second  which is designed using (FIS) or (ANFIS)  improves the total response in order to achieve required results. This technique is applied on a three machine nine bus power system. As expected, the Adaptive neuro-fuzzy inference system (ANFIS) damps out the low frequency oscillations in the better manner than fuzzy inference system (FIS).
power system stabilizer conventional controller fuzzy systems adaptive fuzzy technique