Post-retirement utilisation of synchronous generators to enhance security performances in a wind dominated power system

Post-retirement utilisation of synchronous generators to enhance security performances in a wind dominated power system

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Power system security concerns due to significant wind generation could be twofold: first, the frequency response and second, the short-circuit performance. Continuous development of wind energy may cause economic replacement and retirement of existing synchronous generators. Modern wind turbine generators do not inherently offer inertia and governor response after a disturbance, which may result in declining frequency response behaviour. Besides, they have limited fault current contribution, which may cause unacceptable short-circuit ratio at the grid connection point of those wind power plants. Traditionally, frequency response and short-circuit performance are individually improved. However, both of them are concurrently affected by high wind penetration. Hence, a common approach to simultaneously enhance both indices is essential. Therefore, this study introduces an idea of operating some of the retired synchronous generators in the synchronous condenser mode, which is termed as ‘post-retirement scheme (PRS)’. Such a second use of the retired synchronous generators can jointly upgrade frequency response and short-circuit strength during high wind generation. This study also proposes a methodology to evaluate when and how much PRS should be deployed for ensuring an adequate security performance in a wind dominated power system.


    1. 1)
    2. 2)
    3. 3)
    4. 4)
      • 4. Masood, N., Yan, R., Saha, T., et al: ‘Correlation between frequency response and short-circuit performance due to high wind penetration’. Proc. 2015 IEEE Power and Energy Society General Meeting, Denver, U.S., pp. 15.
    5. 5)
      • 5. Zhang, Y., Huang, S., Schmall, J., et al: ‘Evaluating system strength for large-scale wind plant integration’. Proc. 2014 IEEE Power and Energy Society General Meeting, MD, U.S., pp. 15.
    6. 6)
      • 6. IEEE joint working group: ‘Fault current contributions from wind plants’. Available at, accessed 15 February 2016.
    7. 7)
      • 7. North American Electric Reliability Corporation: ‘Frequency response initiative report-the reliability role of frequency response’. 2012. Available at, accessed 10 February 2016.
    8. 8)
    9. 9)
    10. 10)
    11. 11)
    12. 12)
    13. 13)
      • 13. Sharma, S., Huang, S., Sarma, N.: ‘System inertial frequency response estimation and impact of renewable resources in ERCOT interconnection’. Proc. 2011 IEEE Power and Energy Society General Meeting, San Diego, U.S., pp. 16.
    14. 14)
    15. 15)
    16. 16)
    17. 17)
      • 17. Wang, L., Yeh, C., Hsieh, M., et al: ‘Analysis of voltage variations and short-circuit ratios of a large-scale offshore wind farm connected to a practical power system’. Proc. 2013 IEEE Power and Energy Society General Meeting, Vancouver, Canada, pp. 15.
    18. 18)
      • 18. Feltes, J.W., Fernandes, B.S.: ‘Wind turbine generator dynamic performance with weak transmission grids’. Proc. 2012 IEEE Power and Energy Society General Meeting, San Diego, U.S., pp. 17.
    19. 19)
      • 19. AEMO: ‘Integrating renewable energy-wind integration studies report’. 2013. Available at, accessed 30 January 2016.
    20. 20)
      • 20. AEMO: ‘Electricity statement of opportunities’. 2015. Available at, accessed 7 May 2016.
    21. 21)
      • 21. PSS®E Power System Simulator for Engineering. Available at, accessed 12 February 2016.
    22. 22)
      • 22. Clark, K., Miller, N., Sanchez-Gasca, J.: ‘Modelling of GE wind turbine-generators for grid studies’. GE Energy, 2010, version 4.5.
    23. 23)
      • 23. ‘Bureau of Meteorology’. Available at, accessed 6 May 2016.
    24. 24)
    25. 25)
      • 25. AEMO: ‘Wind integration: international experience, WP2: review of grid codes’. Available at, accessed 3 February 2016.
    26. 26)
      • 26. Li, F., Kueck, J., Rizy, T., et al: ‘A preliminary analysis of the economics of using distributed energy as a source of reactive power supply’ (U.S. Department of Energy, Washington D.C., USA, 2006).
    27. 27)
      • 27. Rose, S., Apt, J.: ‘The cost of curtailing wind turbines for frequency regulation and ramp-rate limitation’. Proc. 29th USAEE/IAEE North American Conf. on Energy and the Environment: Conventional and Unconventional Solutions, 2010, pp. 118.
    28. 28)
      • 28. NERA: ‘Impact of the large-scale renewable energy target on wholesale market prices and emissions level’. 2011. Available at, accessed 10 May 2016.

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