• SANDEEP KUMAR
• REETA PAWAR
• ANURAG.S.D.RAI

In this paper, two different approaches are compared to design centralized Wide Area Damping Controller (WADC) to damp out the inter-area oscillations. The first designed approach is based on local Power System Stabilizer (LPSS) and secondone isInterval Type-2 Fuzzy Logic sets (IT2FLS) based PSS.Todesign the WADC, enhance the stability and reduced the cost of the power system, geometric measure of joint controllability/observability is used to select most effective stabilizing signals and control location site in proposed model. Based on joint controllability/ observability Tie-line active power is found to be most stabilizing signal. Tie Line active power deviation conjunction with speed deviation are used as a input stabilizing signalsand the designed methods are illustrated on Kundur two area four machine system. Simulation results shown that the controller designed which is based on IT2FLS performed better as compared to LPSS .

Fuzzy type-2, Inter-area oscillations, oscillations arising due to different possible disturbances. These oscillations may sustain and grow to cause power systemseparation or collapse if no adequate damping is provided by thesystem controllers. In addition, with the extension of powersystems, especially with their interconnection by weak tie-lines,the oscillations restrict the steady-state power transfer limits andaffect operational system economics and security. A power system stabilizer (PSSs) with Lead-Lag controllers has beenconventionally used to damp electromechanical oscillations inpower systems with providing an auxiliary control signal to theexcitation system. The design of these conventional PSSs isbased on linear control theory which requires linearization of thesystem around a specific operating condition of the power system. Consequently, these controllers give degradedperformance with varying operating conditions and sometimeunable to maintain stability especially in high loading condition

"POWER SYSTEM STABILITY IMPROVMENT UNDER SMALL DISURBANCE USING FUZZY TYPE-2 BASED CONTROLLER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.1072-1080, June-2019, Available :http://www.jetir.org/papers/JETIR1907S69.pdf

"POWER SYSTEM STABILITY IMPROVMENT UNDER SMALL DISURBANCE USING FUZZY TYPE-2 BASED CONTROLLER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp1072-1080, June-2019, Available at : http://www.jetir.org/papers/JETIR1907S69.pdf