Reference power extraction based MPPT technique with enhanced real and reactive power flow control for grid connected DFIG
Keywords:
Doubly Fed Induction Generator (DFIG), maximum power point tracking (MPPT), real and reactive power control, Rotor & grid side converter (RSC & GSC), wind energy conversion system (WECS)Abstract
Doubly Fed Induction Generator (DFIG) needs to get adopted to change in wind speeds with sudden change in reactive power or grid terminal voltage as it is required for maintaining synchronism and stability as per modern grid rules. This paper aims to design controller for DFIG converters and MPPT for turbine to maintain equilibrium in rotor speed, generator torque, and stator and rotor voltages and also to meet desired reference real power during the turbulences like sudden change in reactive power or voltage with concurrently changing wind speed. To achieve better power extraction from turbine, maximum power tracking algorithm was designed which changes blade angle and improves the coefficient of power extracted from turbine. To meet desired real power from generator, Rotor Side Controller (RSC) is designed which keeps rotor to rotate at optimal speed and to vary current flow from rotor and stator terminals. Grid Side Converter (GSC) helps in tracking reactive power demand from grid and also helps in maintaining synchronism when grid voltage changes due to fault, at a very faster and stable way. Parameters like tip speed ratio, coefficient of power, stator & rotor voltage, current, real & reactive power, rotor speed and electromagnetic torque are studied using MATLAB simulation. The performance of DFIG is compared when there is wind speed change only, alter in reactive power and variation in grid voltage individually along with variation in wind speed.
References
Aghanoori, N, Mohseni, M, Masoum, M.A.S, “Fuzzy approach for reactive power control of DFIG-based wind turbines”, IEEE PES Innovative Smart Grid Technologies Asia (ISGT), 2011, pp: 1-6
Syed Muhammad Raza Kazmi, Hiroki Goto, , Hai-Jiao Guo, Osamu Ichinokura, “A Novel Algorithm for Fast and Efficient Speed-Sensor less Maximum Power Point Tracking in Wind Energy Conversion Systems”, IEEE Transactions On Industrial Electronics, Vol. 58, No. 1, January 2011, pp: 29-36
Iwanski, G, Koczara, W, “DFIG-Based Power Generation System With UPS Function for Variable-Speed Applications”, IEEE Transactions on Industrial Electronics, Vol: 55, No. 8, Aug. 2008, pp: 3047 – 3054
Aktarujjaman, M.; Haque, M.E; Muttaqi, K.M. Negnevitsky, M., Ledwich, G, “Control Dynamics of a doubly fed induction generator under sub- and super-synchronous modes of operation”, IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008, pp: 1 – 9
Iwanski, G., Koczara, W., “DFIG-Based Power Generation System With UPS Function for Variable-Speed Applications”, IEEE Transactions on Industrial Electronics, Vol:55, No: 8, Aug. 2008, pp: 3047 - 3054
Dawei Zhi ; Lie Xu, “Direct Power Control of DFIG With Constant Switching Frequency and Improved Transient Performance”, Ieee Transactions On Energy Conversion, Vol. 22, No. 1, March 2007, pp: 110 – 118
Lie Xu ; Cartwright, P;, “Direct active and reactive power control of DFIG for wind energy generation”, IEEE Transactions on Energy Conversion, , Vol. 25, No. 4, Dec 2010, pp: 1028-1039
Mustafa Kayıkc ¸ı and Jovica V. Milanovi´;, “Reactive Power Control Strategies for DFIG-Based Plants”, IEEE Transactions On Energy Conversion, Vol. 22, No. 2, June 2007, pp: 389-396
Stephan Engelhardt, Istvan Erlich, Christian Feltes, Jorg Kretschmann, Fekadu Shewarega, “Reactive Power Capability of Wind Turbines Based on Doubly Fed Induction Generators”, IEEE Transactions On Energy Conversion, Vol. 26, No. 1, March 2011, pp: 364- 372
Gerardo Tapia, Arantxa Tapia, and J. Xabier Ostolaza, “Proportional–Integral Regulator-Based Approach to Wind Farm Reactive Power Management for Secondary Voltage Control”, IEEE Transactions On Energy Conversion, Vol. 22, No. 2, June 2007, pp: 488- 498
Dongkyoung Chwa and Kyo-Beum Lee, “Variable Structure Control of the Active and Reactive Powers for a DFIG in Wind Turbines”, IEEE Transactions On Industry Applications, Vol. 46, No. 6, November/December 2010, pp: 2545-2555
Lingling Fan, Haiping Yin, Zhixin Miao, “On Active/Reactive Power Modulation of DFIG-Based Wind Generation for Interarea Oscillation Damping”, IEEE Transactions On Energy Conversion, Vol. 26, No. 2, June 2011, pp: 513-521
Hua Geng, Cong Liu, Geng Yang, “LVRT Capability of DFIG-Based WECS Under Asymmetrical Grid Fault Condition”, IEEE Transactions On Industrial Electronics, Vol. 60, No. 6, June 2013, pp: 2495-2509
Shukla, R.D.; Tripathi, R.K., “Low voltage ride through (LVRT) ability of DFIG based wind energy conversion system II”, Students Conference on Engineering and Systems (SCES), 2012, Page(s): 1 - 6
Guzmán Díaz, “Optimal primary reserve in DFIGs for frequency support”, International journal of Electrical Power and Energy Systems Vol: 43, 2012, pp: 1193–1195
F. Poitiers, T. Bouaouiche, M. Machmoum, “Advanced control of a doubly-fed induction generator for wind energy conversion”, Electric Power Systems Research, Vol: 79, Feb 2009, pp: 1085–1096.
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