Analytical evaluation of control strategies for participation of doubly fed induction generator-based wind farms in power system short-term frequency regulation

Increase in doubly fed induction generator (DFIG)-based wind farms degrades the short-term frequency regulation of power systems. However, such wind farms may have large amount of kinetic energy which can be rapidly injected into the power system to support system frequency by using an appropriate supplementary control loop. This study first analyses the impacts of DFIGs and their supplementary loop on power system short-term frequency regulation. Then, the average power system frequency model is modified to include the participation of wind farms in frequency control. Moreover, a new method is proposed to derive an analytical expression for minimum frequency of a power system, as an important index of frequency regulation, after a power imbalance occurrence. This analytical expression provides a tool for better insight into frequency behaviour of power systems with high levels of wind generation. The results of the analysis are verified by simulation of the nine-bus test system, using MATLAB/SIMULINK.

[1]  Jin-Ming Lin,et al.  Coordinated frequency regulation by doubly fed induction generator-based wind power plants , 2012 .

[2]  Ayman Attya,et al.  Control and quantification of kinetic energy released by wind farms during power system frequency drops , 2013 .

[3]  P. M. Anderson,et al.  A low-order system frequency response model , 1990 .

[4]  Guzmán Díaz,et al.  Proposal for optimising the provision of inertial response reserve of variable-speed wind generators , 2013 .

[5]  Lei Wu,et al.  Towards an Assessment of Power System Frequency Support From Wind Plant—Modeling Aggregate Inertial Response , 2013, IEEE Transactions on Power Systems.

[6]  Damian Flynn,et al.  Frequency Response of Power Systems With Variable Speed Wind Turbines , 2012 .

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

[8]  F. Schweppe,et al.  Dynamic Equivalents for Average System Frequency Behavior Following Major Distribances , 1972 .

[9]  Badrul H. Chowdhury,et al.  Working towards frequency regulation with wind plants: Combined control approaches , 2010 .

[10]  M. Kayikci,et al.  Dynamic Contribution of DFIG-Based Wind Plants to System Frequency Disturbances , 2009, IEEE Transactions on Power Systems.

[11]  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.

[12]  M. O'Malley,et al.  The inertial response of induction-machine-based wind turbines , 2005, IEEE Transactions on Power Systems.

[13]  S. Santoso,et al.  Understanding inertial and frequency response of wind power plants , 2012, 2012 IEEE Power Electronics and Machines in Wind Applications.

[14]  H. Polinder,et al.  General Model for Representing Variable-Speed Wind Turbines in Power System Dynamics Simulations , 2002, IEEE Power Engineering Review.

[15]  F. Fernandez-Bernal,et al.  Maximum Frequency Deviation Calculation in Small Isolated Power Systems , 2009, IEEE Transactions on Power Systems.

[16]  J.A. Ferreira,et al.  Wind turbines emulating inertia and supporting primary frequency control , 2006, IEEE Transactions on Power Systems.

[17]  Jacob Ostergaard,et al.  Variable speed wind turbines capability for temporary over-production , 2009, 2009 IEEE Power & Energy Society General Meeting.

[18]  H. Banakar,et al.  Kinetic Energy of Wind-Turbine Generators for System Frequency Support , 2009, IEEE Transactions on Power Systems.

[19]  Stavros A. Papathanassiou,et al.  A review of grid code technical requirements for wind farms , 2009 .

[20]  T. Thiringer,et al.  Temporary Primary Frequency Control Support by Variable Speed Wind Turbines— Potential and Applications , 2008, IEEE Transactions on Power Systems.