Transient Stability Enhancement of Multi-machine Power System Using UPFC and SSSC
Anu Rani Sam1, P.Arul2

1Anu Rani Sam, Department of Electrical and Electronics Engineering, Jayaram College of Engineering and Technology, Trichy (Tamil Nadu), India.
2Prof. P Arul, Associate Professor, Department of Electrical and Electronics Engineering, Jayaram College of Engineering and Technology, Trichy (Tamil Nadu), India.
Manuscript received on 12 October 2013 | Revised Manuscript received on 20 October 2013 | Manuscript Published on 30 October 2013 | PP: 77-81 | Volume-3 Issue-5, October 2013 | Retrieval Number: E1254103513/13©BEIESP
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Abstract: Power systems are subjected to various types of disturbances which cause the problem of losing stability. The problem of transient stability is a crucial problem. Transient stability evaluation of large scale power systems is an extremely intricate and highly non-linear problem. The main causes of transient stability may be due to transmission system faults, sudden fault changes, loss of generating units and line switching. So the enhancement of transient stability is essential for a secure power system operation. Transient stability of a system refers to the stability when subjected to large disturbances such as faults and switching of lines. Transient stability of the system can be improved by increasing the system voltage, increasing the X/R ratio, increasing the number of parallel lines between points and placement of the FACTS devices. The FACTS controller can improve the voltage stability, steady-state and transient stability of a power system.UPFC (Unified Power Flow Controller) and SSSC (Static Synchronous Series Compensator) can improve the transient stability of the system. Simulation of transient stability without and with FACTS device was done using MATLAB based program and the analysis is performed on IEEE 6 bus system.
Keywords: FACTS, Newton-Raphson Method, (SSSC) Static Synchronous Compensator, Transient Stability, Unified Power Flow Controller (UPFC).

Scope of the Article: Expert Systems