Hierarchical Control Strategy for DFIG-Based Wind Farm to Enhance the Frequency Stability

Based on the analysis of deloading operation ability through increasing the wind generator rotor speed, this paper presents a hierarchical control strategy for doubly-fed induction generator (DFIG) based wind farm to improve active power and frequency stability. The wind farm layer allocation strategy and wind turbine layer control strategy were designed considering the deloading regulation ability of DFIG-based wind turbine during different wind speed interval. By the hierarchical control strategy, the power system transient frequency stability can improve as much as possible while meeting the active requirements. The simulation results show that by utilizing the hierarchical control strategy the wind turbine rotor can store as much as possible kinetic energy when the power system is stable, and after power disturbances, the rotor rapidly release the stored kinetic energy to response frequency variation, thereby increasing the system frequency stability.

[1]  Ioannis Margaris,et al.  Frequency control support and participation methods provided by wind generation , 2009, 2009 IEEE Electrical Power & Energy Conference (EPEC).

[2]  Lin Jin.  Frequency Regulation by Doubly Fed Induction Generator Wind Turbines Based on Coordinated Overspeed Control and Pitch Control , 2011 .

[3]  Wei-Ting Lin,et al.  Enhancing Frequency Response Control by DFIGs in the High Wind Penetrated Power Systems , 2011, IEEE Transactions on Power Systems.

[4]  Nicholas Jenkins,et al.  Frequency support from doubly fed induction generator wind turbines , 2007 .

[5]  N. D. Hatziargyriou,et al.  Frequency Control in Autonomous Power Systems With High Wind Power Penetration , 2012, IEEE Transactions on Sustainable Energy.

[6]  Li Heming,et al.  Virtual Inertia Control of DFIG-based Wind Turbines Based on the Optimal Power Tracking , 2012 .

[7]  Niu Yuanfang.  Coordinative distribution strategy of wind farm output active power , 2012 .

[8]  N. Senroy,et al.  Issues in the grid frequency regulation with increased penetration of wind energy systems , 2012, 2012 Students Conference on Engineering and Systems.

[9]  Raja Ayyanar,et al.  Control strategy to mitigate the impact of reduced inertia due to doubly fed induction generators on large power systems , 2011, 2011 IEEE Power and Energy Society General Meeting.

[10]  Ouassima Akhrif,et al.  Control strategy insuring contribution of DFIG-Based wind turbines to primary and secondary frequency regulation , 2011, IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society.

[11]  A. Zertek,et al.  Participation of DFIG wind turbines in frequency control ancillary service by optimized rotational kinetic energy , 2010, 2010 7th International Conference on the European Energy Market.

[12]  J.M. Mauricio,et al.  Frequency Regulation Contribution Through Variable-Speed Wind Energy Conversion Systems , 2009, IEEE Transactions on Power Systems.

[13]  Nilanjan Senroy,et al.  Primary frequency regulation by deloaded wind turbines using variable droop , 2013 .