Unit commitment for systems with significant wind penetration

Tuohy, Aidan and Meibom, Peter and Denny, Eleanor and O'Malley, Mark (2009): Unit commitment for systems with significant wind penetration. Published in: IEEE Transactions on Power Systems , Vol. 24, No. 2 (1 May 2009): pp. 885-895.

Abstract

The stochastic nature of wind alters the unit commitment and dispatch problem. By accounting for this uncertainty when scheduling the system, more robust schedules are produced, which should, on average, reduce expected costs. In this paper, the effects of stochastic wind and load on the unit commitment and dispatch of power systems with high levels of wind power are examined. By comparing the costs, planned operation and performance of the schedules produced, it is shown that stochastic optimization results in less costly, of the order of 0.25%, and better performing schedules than deterministic optimization. The impact of planning the system more frequently to account for updated wind and load forecasts is then examined. More frequent planning means more up to date forecasts are used, which reduces the need for reserve and increases performance of the schedules. It is shown that mid merit and peaking units and the interconnection are the most affected parts of the system where uncertainty of wind is concerned

• Item Type: MPRA Paper
• Language: English
• Keywords: power generation dispatch; power system economics; stochastic systems; wind power generation
• Subjects: Q - Agricultural and Natural Resource Economics ; Environmental and Ecological Economics > Q4 - Energy > Q42 - Alternative Energy Sources; Q - Agricultural and Natural Resource Economics ; Environmental and Ecological Economics > Q4 - Energy > Q47 - Energy Forecasting; Q - Agricultural and Natural Resource Economics ; Environmental and Ecological Economics > Q4 - Energy

References

Government White Paper, “Delivering a sustainable energy future for ireland,” http://www.dcmnr.gov.ie, 2007.

UK Government White Paper, “Meeting the energy challenge,” http://www.dti.gov.co.uk, 2007.

AWEA, “2007 market report,” Available http://www.awea.org/.

G. Lalor, A. Mullane, and M. O. Malley, “Frequency control and wind turbine technologies,” IEEE Trans. Power Syst., vol. 20, no. 4, pp. 1905–1913, Nov. 2005.

C. Bayfield, S. Wood, A. Hiorns, and C. Trikha, “Planning for the integration of on-shore renewable generation for the gb transmission system,” in Proc. CIGRE 2006, Paris, 2008, paper C2-108.

R. Baldick, “The generalized unit commitment problem,” IEEE Trans.Power Syst., vol. 10, no. 1, pp. 465–475, Feb. 1995.

I. Marti et al., “Evaluation of advanced wind power forecasting models - results of the anemos project,” Available: http://anemos.cma.fr, 2006.

L. Soder, “Reserve margin planning in a wind-hydro-thermal power system,” IEEE Trans. Power Syst., vol. 8, no. 2.

R. Doherty and M. O’Malley, “A new approach to quantify reserve demand in systems with significant installed wind capacity,” IEEE Trans. Power Syst., vol. 20, no. 2, pp. 587–595, May 2005.