Intelligent Control of UPFC for Enhancing Transient Stability on Multi-Machine Power Systems

Subject Areas : Renewable energy

Hassan  Barati ¹ (Assistant Professor/Islamic Azad University, Dezful Branch)
Reza  Saki ² (MSc/Islamic Azad University, Doroud Branch)
Seyed Saeeidolah  Mortazavi ³ (Assistant Professor/Shahid Chamran University of Ahvaz)

Received: 2009-10-02 Accepted : 2010-01-18 Published : 2010-02-01

Keywords: UPFC, transient stability, conventional and fuzzy PI controller, optimization algorithms (GA, PSO and HGAPSO),

Abstract :

One of the benefit of FACTS devices is increase of stability in power systems with control active and reactive power at during the fault in power system. Although, the power system stabilizers (PSSs) have been one of the most common controls used to damp out oscillations, this device may not produce enough damping especially to inter-area mode and therefore, there is an increasing interest in using FACTS devices to aid in damping of these oscillations. In This paper, UPFC is used for damping oscillations and to enhance the transient stability performance of power systems. The controller parameters are designed using an efficient version of the Takagi-Sugeno fuzzy control scheme. The function based Takagi-Sugeno-Kang (TSK) fuzzy controller uses. For optimization parameters of fuzzy PI controller, the GA, PSO and HGAPSO algorithms are used. The computer simulation results, the effect of UPFC with conventional PI controller, fuzzy PI controller and intelligent controllers (GA, PSO and HGAPSO) for damping the local-mode and inter-area mode of under large and small disturbances in the four-machine two-area power system evaluated and compared.