Conference Program


 (Add to Calendar)  Wednesday, August 22, 17:00 – 17:50 h, H0104:


Claudia Sagastizábal: Divide to conquer: decomposition methods for energy optimization

Chair: Alejandro Jofré



Modern electricity systems provide a plethora of challenging issues in optimization. The increasing penetration of low carbon renewable sources of energy introduces uncertainty in problems traditionally modeled in a deterministic setting. The liberalization of the electricity sector brought the need of designing sound markets, ensuring capacity investments while properly reflecting strategic interactions. In all these problems, hedging risk, possibly in a dynamic manner, is also a concern. The fact of representing uncertainty and/or competition of different companies in a multi-settlement power market considerably increases the number of variables and constraints. For this reason, usually a trade-off needs to be found between modeling and numerical tractability: the more details are brought into the model, the harder becomes the optimization problem. Both for optimization and generalized equilibrium problems, we explore some variants of solution methods based on Lagrangian relaxation and on Benders decomposition. Throughout we keep as a leading thread the actual practical value of such techniques in terms of their efficiency to solve energy related problems.


Biographical sketch:

Claudia Sagastizábal is on leave from a researcher position at INRIA, in France, and is currently adjunct as a long-term visitor to IMPA, in Rio de Janeiro. After finishing her undergraduate math studies in Argentina, Claudia moved to Paris, where she got her PhD in 1993 and her habilitation degree in 1998, both at the University Paris I Panthéon-Sorbonne. She has taught optimization in Argentina, France, and Brazil and is co-author of the book "Numerical Optimization: Theoretical and Practical Aspects'' published by Springer. Claudia has also served in various program committees of international conferences and was elected Council Member-at-large in the Mathematical Optimization Society for the period 2009-2012. In parallel with her academic activities, Claudia has held consulting appointments for companies such as Electricité de France, Gaz de France-Suez, Renault-France, Robert Bosch, Petrobras, and Eletrobras. Her research interests lie in the areas of nonsmooth optimization as well as convex and variational analysis, always driven by real-life applications, with emphasis on the energy sector.

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