access icon free Enhanced model of the doubly fed induction generator-based wind farm for small-signal stability studies of weak power system

This study proposes an enhanced model of the doubly fed induction generator (DFIG)-based wind farm (WF) for small-signal stability (SSS) studies of weak power system. This model consists of a wind turbine, a drive train, a simplified generator/converter module and associated controls. As analysed and verified in this study, the dynamics of the phase-locked-loop and the rotor current loop are important for accurate SSS studies of the weak power system involving the DFIG-based WF and thus should be modelled appropriately. The enhanced model is validated by eigenvalue analysis and time-domain simulations. Compared with the detailed model, the WT3 model provided by General electric (GE) energy and the conventional model, the enhanced model presents high precision and satisfactory simplification for SSS studies. As the application of the enhanced model, a case study is carried out to explore the impact of WF ancillary voltage/frequency controls on SSS of the weak grid. As indicated in this study, the WF ancillary controls exert distinct impact on SSS. New lightly damped power oscillations can be introduced. Therefore extra measures should be considered if the ancillary controls are required by the WF in order to satisfy the future grid codes.

Inspec keywords: power system stability; rotors; power convertors; wind turbines; wind power plants; phase locked loops; electric drives; power transmission (mechanical); eigenvalues and eigenfunctions; time-domain analysis; oscillations; asynchronous generators; power system control

Other keywords: phase-locked-loop dynamics; DFIG-based WF; small-signal stability studies; WF ancillary controls; doubly fed induction generator-based wind farm enhanced model; wind turbine; associated controls; weak power system; eigenvalue analysis; time-domain simulations; generator module; rotor current loop dynamics; grid codes; converter module; drive train; power oscillations

Subjects: Drives; Mathematical analysis; Wind power plants; Mathematical analysis; Stability in control theory; Control of electric power systems; Power convertors and power supplies to apparatus; Modulators, demodulators, discriminators and mixers; Power system control; Asynchronous machines

References

    1. 1)
      • 19. GE energy, ‘Modeling of GE Wind Turbine-Generators for Grid Studies’, (version 4.5, 2010), pp. 1037.
    2. 2)
    3. 3)
      • 18. Miller, N.W., Sanchez-Gasca, J.J., Price, W.W., et al: ‘Dynamic modeling of GE 1.5 and 3.6 MW wind turbine-generators for stability simulations’. Proc. IEEE Power Engineering Society General Meeting, 2003, pp. 19771983.
    4. 4)
      • 23. Xi, X., Geng, H., Yang, G.: ‘Modelling of the DFIG based wind farms for small signal stability analysis of weak power grids’. Proc. Second IET Renewable Power Generation Conf. (RPG 2013), Beijing, 2013, pp. 14.
    5. 5)
      • 12. Rueda, J.L., Erlich, I.: ‘Impacts of large scale integration of wind power on power system small-signal stability’. Proc. Fourth Int. Conf. on Electric Utility Deregulation and Restructuring and Power Technologies, Weihai, Shandong, 2011, pp. 673681.
    6. 6)
      • 24. Zheng, Y., Li, Y.: ‘Stability analysis of doubly-fed wind power generation system based on phase-locked loop’. Proc. Int. Conf. on Electrical Machines and Systems (ICEMS), 2008, pp. 22512254.
    7. 7)
    8. 8)
    9. 9)
      • 7. Sun, Y., Wang, L., Li, G., et al: ‘A review on analysis and control of small signal stability of power systems with large scale integration of wind power’. Proc. Int. Conf. on Power System Technology (POWERCON), Hangzhou, 2010, pp. 16.
    10. 10)
    11. 11)
    12. 12)
    13. 13)
      • 1. Kundur, P.: ‘Chapter 12: small-signal stability’, in Kundur, P. (Ed.): ‘Power system stability and control’ (McGraw-Hill, New York, 1994).
    14. 14)
      • 22. The MathWorks, Inc.: ‘Simulink Control Design™ 3 – User's Guide’, 2010.
    15. 15)
    16. 16)
      • 5. Modi, N., Saha, T.K., Mithulananthan, N.: ‘Effect of wind farms with doubly fed induction generators on small-signal stability – a case study on Australian equivalent system’. Proc. IEEE PES Innovative Smart Grid Technologies Asia (ISGT), 2011, pp. 17.
    17. 17)
      • 11. Li, S., Sun, Y., Wu, T., et al: ‘Analysis of Small Signal Stability of Grid-Connected Doubly Fed Induction Generators’. Proc. Asia-Pacific Power and Energy Engineering Conf. (APPEEC), Chengdu, 2010, pp. 14.
    18. 18)
      • 15. Wang, H., Zhang, Y., Zhou, Q.: ‘Wind farm model with DFIG for small signal stability study’. Proc. Fourth Int. Conf. on Electric Utility Deregulation and Restructuring and Power Technologies, Weihai, Shandong, 2011, pp. 303307.
    19. 19)
      • 21. The MathWorks, Inc.: ‘Wind Farm – DFIG detailed model (power_wind_dfig_det.mdl)’, in ‘SimPowerSystems™ 5 – User's Guide’, 2010.
    20. 20)
    21. 21)
    22. 22)
    23. 23)
      • 8. Ting, L., Barnes, M., Ozakturk, M.: ‘Doubly-fed induction generator wind turbine modelling for detailed electromagnetic system studies’, IET Renew. Power Gener., 2013, 2, (7), pp. 180189.
    24. 24)
    25. 25)
      • 3. Berrutti, F., Giusto, A., Artenstein, M.: ‘Dynamic characterization of wind farms and their impact in power systems oscillations’. Proc. Sixth IEEE/PES Transmission and Distribution, Montevideo, 2012, pp. 17.
    26. 26)
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-rpg.2013.0394
Loading

Related content

content/journals/10.1049/iet-rpg.2013.0394
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading