Abstract—The paper presented here is dedicated to design of Neuro-Fuzzy controller for damping Low Frequency Oscillations (LFO) for Unified Power Flow Controller (UPFC). LFO occur in power system because of Lack of balance between electrical power and mechanical power. Traditionally Power System Stabilizers (PSS) can be used to damp LFO but with the introduction of Facts devices Such as UPFC which has future advantage of increase transient stability and reduce sub-synchronous resonance along with damping LFO. So UPFC can be used to damp LFO Instead of PSS. In this paper mathematical model of Single Machine Infinite Bus (SMIB) with UPFC will be designed. For controlling UPFC, PSS and Neuro-Fuzzy controllers were designed and simulated for different faults. Results show good performance of neuro-fuzzy controller.

Index Terms—Neuro-Fuzzy controller, Low Frequency Oscillations (LFO), Unified Power Flow Controller (UPFC), Single Machine-Infinite Bus (SMIB)

Cite: G Venkata Sagar and K Kalyan Kumar, "DAMPING OF LOW FREQUENCY OSCILLATIONS WITH UPFC AN APPLICATION OF NEURO-FUZZY CONTROLLER," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 1, No. 1, pp. 95-104, October 2012.