Wind Turbine Transient Stability Improvement in Power System using PWM Technique and Fuzzy Controller
S.Radha Krishna Reddy1, JBV Subrahmanyam2, A. Srinivasula Reddy3

1S.Radha Krishna Reddy, Research Scholar in Faculty of Electrical & Electronics Engineering Department, JNTUH, Hyderabad, India
2JBV Subrahmanyam, Electrical Engineering Department, Salman Bin Abdul Aziz University, Alkharj,Saudi Arabia.
3A. Srinivasula Reddy, Electrical& Electronics Engineering Department, Samskruti College of Engineering &Technology, Hyderabad, India.
Manuscript received on February 05, 2013. | Revised Manuscript received on February 28, 2013. | Manuscript published on March 05, 2013. | PP: 365-370 | Volume-3 Issue-1, March 2013. | Retrieval Number: A1354033113/2013©BEIESP
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Abstract: In recent years, the increasing concerns to the environmental issues and the limited availability of conventional fossil fuels lead to rapid research and development for more sustainable and alternative electrical sources. Wind energy, as one of the most prominent renewable energy sources, is gaining increasing significance throughout the world. Distributed Generation (DG), based on renewable energy has become a development trend for electric power industry in 21stcentury. The currently worldwide installed capacity of grid connected wind generators grows rapidly. Therefore detailed analysis needs about the impact of wind power on system security and system operation. But DG is affected by natural conditions being not able to output power continuously and steadily. So when large scale wind turbine generators are incorporated into the grid, they will bring impact on electric power system stability. In order to ensure stable operation of electric power system, application of a super capacitor energy storage system (SCESS) superior to other energy storage technologies and Doubly Fed Induction wind Generator (DFIG) are presented in this paper. CESS is connected to the grid at the Point of Common Coupling (PCC). Matlab/Simulink software is used for modelling and simulation analysis. In this paper, transient stability problem if focussed. The simulation results obtained indicate that SCESS can improve transient stability of wind turbine generator system connected to the grid, and by using doubly fed induction generators, electric power system stability can be improved.
Keywords: Distributed Generation (DG); Super Capacitor Energy Storage System (SCESS); Transient Stability; Doubly Fed Induction Wind Generator (DFIWG); Fuzzy Controller and PWM Technique.