Comparison and Simulation of Open Loop System and Closed Loop System Based UPFC used for Power Quality Improvement
S. Muthukrishnan1, A. Nirmalkumar2 

1S.Muthukrishnan, Department of EEE, Anna university/ Sri Eshwar College of Engg. Coimbatore, India.
2Dr.A,Nirmalkumar Department of EEE, Anna university / Info College of Engg. Coimbatore, India.
Manuscript received on December 07, 2011. | Revised Manuscript received on December 23, 2011. | Manuscript published on January 05, 2012. | PP: 253-258 | Volume-1 Issue-6, January 2012. | Retrieval Number: F0312111611/2012©BEIESP
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Abstract: This paper deals with digital simulation of power system using open loop system and closed loop based UPFC to improve the power quality. The UPFC is capable of improving transient stability in a power system. It is the most complex power electronic system for controlling the power flow in an electrical power system. The real and reactive powers can be easily controlled in a power system with a UPFC. The circuit model is developed for UPFC using rectifier and inverter circuits with the help of IGBT and MOSFET. The control angle of the converters is varied to vary the real and reactive powers at the receiving end. The Matlab simulation results are presented to validate the model. The experimental results are compared with the simulation results.
Keywords: UPFC, Power Quality, Statcom, Compensation and matlab simulink.