Posters

Abstract

To achieve a sustainable and reliable energy supply, wind farms will form a main pillar of the future energy system. The transition of the entire energy system to renewables increases the requirements and demands for the operation of wind farms, which will need to include possibilities for energy storage like hydrogen-electrolysis, batteries, or other subcomponents in the future. Scenarios like retrofitting (shift from electricity to hydrogen production) or repowering of existing wind farms will become relevant, as well as the optimal setup and operation of new wind farms. This allows for many more degrees of freedom during the design of a wind farm and its auxiliary components. To make an investment decision, detailed analysis is required. However, the larger number of possible technical solutions requires an efficient modelling, simulation, and evaluation approach. For this purpose, we have defined a modular interface concept, which allows a flexible and extensible setup of a wind farm model with medium fidelity. The interfaces are defined as two different types. One represents the exchange of information and the other the physical coupling due to the exchange of power. The latter relies on the principles of bond graph theory for model coupling by the exchange of power. In this context, the interface is thought of connectors, where two coupled models have opposite implementations of the interface. This makes models exchangeable when they behave similarly. Therefore, this can be applied directly for the wind farm modelling, since most power is distributed in the local electrical grid. Any number of consumers or providers of electrical energy can be added into the model chain and therefore extend the wind farm. The complexity can be increased as needed if models use the same interface for model coupling. Overall, the simulations are run in a Co-Simulation environment, where all models are Functional-Mock-Up-Units (FMI-Standard). We use Foxes, MoWiT, and further in-house models for batteries and electrolyser, where individual inputs and outputs are mapped to the interface definitions. An ontological description of the interfaces enables the automated connection of models with a higher-level description of the model connections. Thereby, full wind farm simulation models can be generated. This enables to simulate many technical solutions or extensions for future wind farms with batteries or electrolyser. Furthermore, repowering of wind farms can be considered as well. Future repowering projects might need to reuse existing cable layouts or other components to save costs and materials. This can be evaluated, even optimized, by reusing parts of the models. For demonstration of Co-Simulation with the modular interface concept, we evaluate wind farm extensions to support energy yield. The modular interface concept increases the reusability of already available simulation models and allows for efficient evaluations of new wind farms concepts to support investment decisions.