- Volume 5 Issue 3
An enhanced control strategy for variable-speed unbalanced stand-alone doubly-fed induction generator-based wind energy conversion systems is proposed in this paper. The control scheme is applied to the rotor-side converter to eliminate stator voltage imbalance. The proposed current controller is developed based on the proportional-resonant regulator, which is implemented in the stator stationary reference frame. The resonant controller is tuned at the stator synchronous frequency to achieve zero steady-state errors in rotor currents without decomposing the positive and negative sequence components. The computational complexity of the proposed control algorithm is greatly simplified, and control performance is significantly improved. Finally, simulations and experimental results are presented to verify the feasibility and the robustness of the proposed control scheme.
Doubly fed induction generator (DFIG);Resonant controller;Unbalanced load;Stand-alone wind system
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- Lie Xu and Yi Wang, “Dynamic modeling and control of DFIG-based wind turbine under unbalanced network conditions,” IEEE Transactions on Power Systems, Vol. 22, No. 1 pp. 314-323, Feb. 2007. https://doi.org/10.1109/TPWRS.2006.889113
- Lie Xu, “Coordinated control of DFIG’s rotor and grid side converters during network unbalance,” IEEE Transactions on Power Electronics, Vol. 23, No. 3 pp. 1041-1049, May 2008. https://doi.org/10.1109/TPEL.2008.921157
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- 1. Design of DC Side Voltage and Compensation Analysis of THD for Shunt Power Quality Controller under System Load of Rectifier with R-L Load vol.10, pp.1, 2015, doi:10.5370/JEET.2010.5.3.443
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