Application of STATCOM for Transient Stability Improvement and Performance Enhancement for a Wind Turbine based Induction Generator
CH. Appala Narayana1, D. V. N. Ananth2, K. D. Syam Prasad3, CH. Saibabu4, S. SaiKiran5, T. PapiNaidu6

1CH.Appala Narayana, VITAM College of Engineering, Visakhapatnam.India.
2D.V.N.Ananth, VITAM College of Engineering, Visakhapatnam.India.
3K.D.Syam Prasad, VITAM College of Engineering, Visakhapatnam. India.
4CH. Saibabu, JNTU Kakinada.
5S.Sai Kiran, VITAM College of Engineering, Visakhapatnam.India.
6T. PapiNaidu, DADI Engineering Colleges
Manuscript received on January 01, 2013. | Revised Manuscript received on January 02, 2013. | Manuscript published on January 05, 2013. | PP: 158-163 | Volume-2, Issue-6, January 2013. | Retrieval Number: F1130112612/2013©BEIESP
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Abstract: Voltage stability is a key issue to achieve the uninterrupted operation of wind farms equipped with squirrel cage induction generators (SCIG) during grid faults. A Static Synchronous Compensator (STATCOM) is applied to a power network which includes a SCIG driven by a wind turbine, for steady state voltage regulation and transient voltage stability support. The STATCOM is controlled by using PQ controller technique with voltage regulation as basic scenario. The system is implemented using MATLAB/ SIMULINK. Results illustrate that the STATCOM improves the transient voltage stability and therefore helps the wind turbine generator system to remain in service during grid faults. The time to reach steady state torque and speed without using vector control or direct torque control can also be achieved by using this STATCOM control technique. 
Keywords: STATCOM, PQ control theory, induction machine, PWM.