Low Voltage Ride-Through Analysis of Doubly Fed Induction Generator Wind Turbines under Grid Fault
- 204 Downloads
The new grid rules require the wind generators should have the ability of the low voltage ride-through, and it’s very important for the safety and stability of power system. In order to restrain the rotor of the doubly fed induction generator appearing over-voltage and over-current shock under the grid faults, the doubly- fed machine system had been established, after considering the electric network fluctuation. The paper presented the improved strategy of the stator flux vector to control the generator speed and stator output reactive power. The numerical simulation in MATLAB shows that the method effectively improved the control for the rotor current under grid faults, enhance the stability of power system and the ability of low voltage ride through.
KeywordsWind power DFIG Vector control Low voltage ride through
Unable to display preview. Download preview PDF.
- 3.Liujiahui, Heyikang, Zhangjiahua: Ac excitation constant frequency variable speed wind generators grid control strategy. Automation of Electric Power Systems 30(3), 51–56 (2006)Google Scholar
- 4.Spahic, E., Morren, J., Balzer, G., et al.: Mathematical model of the double fed induction generator for wind turbines and its control quality. In: Proceedings of 2007 IEEE International Conference on Power Engineering, Energy and Electrical Drives, Setubal, Portugal, April 12-14, pp. 642–647 (2007)Google Scholar
- 6.Hugubing, Guoxiaoming, et al.: Voltage unbalanced conditions doubly-fed different wind-driven generator system modeling and control. Automation of Electric Power Systems 31(14), 47–56 (2007)Google Scholar
- 7.Lijianlin, Xuhongyan, Liangliang, et al.: DFIG VSCF - in voltage instantaneous fall under the circumstance of strategies. Automation of Electric Power Systems 30(19), 65–68 (2006)Google Scholar