Fuzzy Based Combined Feed-Forward and Feed-Back Controlled Dynamic Voltage Restorer for Enhanced Fault Ride through Capability in DFIG based Wind Turbines
Siddu Balarami Reddy1, M. Ramasekhara Reddy2

1Siddu Balarami Reddy*, M.Tech (Student), Dept. of Electrical Engineering, JNTUA, Ananthapuramu, Andhra Pradesh, India.
2M. Ramasekhara Reddy, Assistant professor, Dept. of Electrical Engineering, JNTUA University, Ananthapuramu, Andhra Pradesh, India.

Manuscript received on November 15, 2019. | Revised Manuscript received on 20 November, 2019. | Manuscript published on December 10, 2019. | PP: 2673-2679 | Volume-9 Issue-2, December 2019. | Retrieval Number: B7441129219/2019©BEIESP | DOI: 10.35940/ijitee.B7441.129219
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Abstract: In this paper, Fault ride through (FRT) capability is enhanced using dynamic voltage restorer (DVR) in a wind turbine-driven doubly fed induction generator (DFIG). For effective control of the DVR, Fuzzy based combined feed-forward and feed-back (CFFFB) voltage control is used. The performance of DVR using CFFFB with FLC control is observed during balanced and unbalanced conditions in terms of voltage sag mitigation, reduced THD, fault current control and dc-link voltage balancing. The advantage of control strategy is validated utilizing simulation of 1.5MW DFIG-WT and results shows better reactive power support during faults condition. 
Keywords: Doubly-fed Induction Generator (DFIG), Dynamic Voltage Restorer (DVR), Fault Ride through (FRT), Combined Feed-forward and Feed-Back Control.
Scope of the Article: Fuzzy Logics