Medium-Term Hydropower Scheduling with Variable Head under Inflow, Energy and Reserve Capacity Price Uncertainty

Martin N. Hjelmeland, Arild Helseth and Magnus Korpås
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Martin N. Hjelmeland: Department of Electric Power Engineering, NTNU Norwegian University of Science and Technology, 7491 Trondheim, Norway
Arild Helseth: SINTEF Energy Research, 7034 Trondheim, Norway
Magnus Korpås: Department of Electric Power Engineering, NTNU Norwegian University of Science and Technology, 7491 Trondheim, Norway

Energies, 2019, vol. 12, issue 1, 1-15

Abstract: We propose a model for medium-term hydropower scheduling (MTHS) with variable head and uncertainty in inflow, reserve capacity, and energy price. With an increase of intermittent energy sources in the generation mix, it is expected that a flexible hydropower producer can obtain added profits by participating in markets other than just the energy market. To capture this added potential, the hydropower system should be modeled with a higher level of detail. In this context, we apply an algorithm based on stochastic dual dynamic programming (SDDP) to solve the nonconvex MTHS problem and show that the use of strengthened Benders (SB) cuts to represent the expected future profit (EFP) function provides accurate scheduling results for slightly nonconvex problems. A method to visualize the EFP function in a dynamic programming setting is provided, serving as a useful tool for a priori inspection of the EFP shape and its nonconvexity.

Keywords: hydropower scheduling; stochastic programming; integer programming (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (5)

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