Fatimatou WADE : " Optimization of an integrated energy system based on a hydrogen-fueled gas turbine for Power-to-Power [...]

PhD works  :Optimization of an integrated energy system based on a hydrogen-fueled gas turbine for Power-to-Power, hydrogen supply, and ancillary services under techno-economic and environmental constraints

Abstract : This thesis focuses on the techno-economic assessment of an integrated energy system combining a wind plant, a solar plant, an electrolyzer, a compressor, hydrogen storage, and a hydrogen-powered gas turbine for net-zero power supply based on the Power-to-Power process. An iterative sizing method is first developed, coupled with a rule-based energy management strategy to enable preliminary system sizing while minimizing upfront costs and ensuring reliable power supply. Building upon this, a bi-level optimization framework is proposed to achieve simultaneous optimized technology selection and optimized energy management for different energy schemes including power supply, hydrogen supply, and wholesale demand response via electrolyzer planned load reduction. The outer layer of the optimization employs a genetic algorithm to determine the optimal installed capacities of renewables, electrolysis, storage, and the gas turbine plant, maximizing the net present value of the project. The inner layer consists of a mixed-integer linear programming formulation, solving an hourly unit commitment problem to maximize revenues and minimize operational costs. To apply this framework, two case studies are explored, each featuring a different type of hydrogen-fueled gas turbine within different contexts. The first considers an aeroderivative gas turbine in Australia, while the second examines a heavy-duty gas turbine in Germany. The key findings of this research highlight that under optimized energy management conditions, demand is successfully met by a combination of renewable generation for baseload power, a hydrogen turbine for balancing, an electrolyzer for excess renewable conversion, and storage acting as a buffer. The results also indicate that significant hydrogen storage capacity is required for fully-powered gas turbine plant, with underground solutions such as salt caverns proving more viable than pressurized aboveground vessels. Additionally, allowing hydrogen sales to refineries can generate extra revenue; however, financial incentives—such as capital grants, feed-in premiums, or tax credits—are necessary to achieve project profitability.Robin ROCHE, Professeur des universités, Université Marie et Louis Pasteur, Directeur de thèse

Jury Composition:

Robin ROCHE, Professeur des universités, Université Marie et Louis Pasteur, Directeur de thèse

Manuela SECHILARIU, Professeure des universités, Université de Technologie de Compiègne, Rapporteur

Damien GUILBERT, Professeur des universités, Université Le Havre Normandie, Rapporteur

Vincent BERTRAND, Maître de conférences, Université Marie et Louis Pasteur, CoDirecteur de thèse

Damien PAIRE, Maître de conférences, Université de Technologie Belfort-Montbéliard, Co-encadrant de thèse

Xavier ROBOAM, Directeur de recherche, Université de Toulouse, Examinateur

Robin GIRARD, Directeur de recherche, Mines Paris – PSL, Examinateur

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