Dr. Julia Grübel
About
Julia Grübel holds a M.Sc. in Mathematics with a focus on Modeling, Simulation, and Optimization as well as a B.Sc. in Business Mathematics from the Friedrich-Alexander-Universität Erlangen-Nürnberg. She received her Doctorate in Mathematics from the Trier University in 2021. From January 2022 to February 2024, she worked as a postdoctoral researcher at the Chair of Economic Theory at the Friedrich-Alexander-Universität Erlangen-Nürnberg. Since March 2024, she is part of the Energy Systems and Market Design Lab at the University of Technology Nuremberg. Her research interests include general equilibrium problems and their applications to energy markets.
Research
- Bilevel optimization
- General equilibrium problems
- Energy market modeling and design
Teaching
- Game Theory
- Microeconomics
- Supervision of bachelor, master, project, and seminar theses
Dissertation
Grübel, J. (2022). Existence, Uniqueness, and Algorithms for Equilibria in Competitive Energy Markets.
Preprint
- Grimm, V., Grübel, J., Schmidt, M., Schwartz, A., Zöttl, G., & Wiertz, A.-K. (2023). On a Tractable Single-Level Reformulation of a Multilevel Model of the European Entry-Exit Gas Market with Market Power.
- Thürauf, J., Grübel, J., Schmidt, M. (2024). Adjustable Robust Nonlinear Network Design under Demand Uncertainties.
Publications
2023
- Grübel, J., Huber, O., Hümbs, L., Klimm, M., Schmidt, M., & Schwartz, A. (2023). Nonconvex equilibrium models for energy markets: exploiting price information to determine the existence of an equilibrium. Optimization Methods & Software, 38(1), 153-183. https://dx.doi.org/10.1080/10556788.2022.2117358
- Grübel, J., Krug, R., Schmidt, M., & Wollner, W. (2023). A Successive Linear Relaxation Method for MINLPs with Multivariate Lipschitz Continuous Nonlinearities. Journal of Optimization Theory and Applications, 198, 1077-1117. https://dx.doi.org/10.1007/s10957-023-02254-9
2022
- Egerer, J., Grimm, V., Grübel, J., & Zöttl, G. (2022). Long-run market equilibria in coupled energy sectors: A study of uniqueness. European Journal of Operational Research, 303(3), 1335-1354. https://dx.doi.org/10.1016/j.ejor.2022.03.028
2020
- Grimm, V., Grübel, J., Rückel, B., Sölch, C., & Zöttl, G. (2020). Storage investment and network expansion in distribution networks: The impact of regulatory frameworks. Applied Energy, 262. https://dx.doi.org/10.1016/j.apenergy.2019.114017
- Grübel, J., Kleinert, T., Krebs, V., Orlinskaya, G., Schewe, L., Schmidt, M., & Thürauf, J. (2020). On electricity market equilibria with storage: Modeling, uniqueness, and a distributed ADMM. Computers & Operations Research, 114. https://dx.doi.org/10.1016/j.cor.2019.104783
2019
- Grimm, V., Grübel, J., Schewe, L., Schmidt, M., & Zöttl, G. (2019). Nonconvex Equilibrium Models for Gas Market Analysis: Failure of Standard Techniques and Alternative Modeling Approaches. European Journal of Operational Research, 273(3), 1097-1108. https://dx.doi.org/10.1016/j.ejor.2018.09.016