Flexible power system operation accommodating uncertain wind power generation using transmission topology control: an improved linearised AC SCUC model

Flexible power system operation accommodating uncertain wind power generation using transmission topology control: an improved linearised AC SCUC model

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Stochastic security constrained unit commitment (SSCUC) based on a DC model could be problematic in AC networks because the DC model is potentially inaccurate. However, solving SSCUC problems using an AC model is still very challenging. Accordingly, an improved linearised AC optimal power flow (ILACOPF) model is provided in order to optimise the SSCUC problem. The proposed SSCUC model includes a linear representation of network losses and reactive power and bus voltage magnitudes. Moreover, in this study, transmission switching (TS), a powerful tool for grid side flexibility, is introduced and utilised to facilitate the mitigation of the uncertainty of wind power generation. Nevertheless, solving the SSCUC problem with TS in a full AC network is still one of the challenges in practical implementation, which is facilitated by the proposed ILACOPF model. Additionally, the aim of this study is to develop a more accurate power flow model to obtain a more realistic SSCUC solution using TS. The proposed ILAC-SSCUC model using TS is formulated as a mixed-integer linear programme, being solved by the proposed effective solution approach based on Benders’ decomposition. Numerical simulations on a 6-bus and IEEE 118-bus systems have been performed to evaluate the effectiveness of the method.


    1. 1)
    2. 2)
    3. 3)
      • 3. Nasri, A., Kazempour, S.J., Conejo, A.J., et al: ‘Network-constrained AC unit commitment under uncertainty: a Benders’ decomposition approach’, IEEE Trans. Power Syst., 2014, 28, (3), pp. 14791499.
    4. 4)
      • 4. Global Wind Energy Council. Available at
    5. 5)
    6. 6)
    7. 7)
    8. 8)
    9. 9)
    10. 10)
    11. 11)
    12. 12)
      • 12. Henneaux, P., Kirschen, D.S.: ‘Probabilistic security analysis of optimal transmission switching’, IEEE Trans. Power Syst., 2015, 26, (2), pp. 994985.
    13. 13)
    14. 14)
    15. 15)
    16. 16)
    17. 17)
      • 17. Gurobi Optimization, Gurobi Optimizer Reference Manual. Available at
    18. 18)
    19. 19)
      • 19. Manwell, J.F., McGowan, J.G., Rogers, A.L.: ‘Wind energy explained: theory, design and application’ (John Wiley & Sons, Chichester, UK, 2010).
    20. 20)
      • 20. Billinton, R., Allan, R.N., Allan, R.N.: ‘Reliability evaluation of power systems’ (Plenum Press, New York, 1984), vol. 2.
    21. 21)
      • 21. GAMS/SCENRED Documentation. Available at
    22. 22)
      • 22. Sun, J., Tesfatsion, L.: ‘DC optimal power flow formulation and solution using QuadProgJ’. ISU Economics Working Paper, 2010.
    23. 23)
    24. 24)
    25. 25)
      • 25. Brooke, A., Kendrick, D., Meeraus, A., et al: ‘GAMS: a user's guide’ (GAMS Development Corporation, Washington, DC, 2003).
    26. 26)
      • 26. IIT Power Group, 2003, Available at
    27. 27)
      • 27. CPLEX, GAMS. The Solver Manuals. GAME/CPLEX, 1996. Available at
    28. 28)
      • 28. Generalized Algebraic Modeling Systems (GAMS). Available at
    29. 29)
      • 29. Drud, A.S.: ‘GAMS/CONOPT’ (ARKI Consulting and Development, Bagsvaerd, Denmark, 1996). Available at

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