Optimising a Nuclear Hybrid Energy System’s dispatch strategy: coupling dynamic and techno-economic optimisation tools

Dispatch optimisation is a key aspect for Nuclear Hybrid Energy Systems (NHES) analysis. The potential thermal interconnections between NHES subcomponents introduces strong dynamic and inertial effects, causing non-linearities that can be hardly represented by conventional linear optimisation tools. To address this challenge, the techno-economic optimiser PERSEE was coupled with a Modelica-based dynamic simulator to be able to account for dynamic effects during the optimisation phase. This approach was tested on an illustrative NHES architecture, with the results demonstrating that it is possible to improve the consistency between the tools through this hard-linking approach, predicting a physically viable optimal operational strategy.