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Andreas Ulbig

3 papers indexed

arxiveess.SY2026-07-31

Influence of Controller Tuning on Cascaded Flexibility Provision with Feedback Optimization

Irina Zettl, Florian Klein-Helmkamp, Florian Schmidtke, Lukas Ortmann, Andreas Ulbig

The coordination of a large number of flexibility-providing units across various grid layers requires innovative control concepts. This is needed, e.g., to allow active distribution systems to provide ancillary services for the transmission system. A cascaded control structure ba…

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arxiveess.SY2026-07-24

Physics-Informed Neural Network for Modeling the Dynamic Behavior of Grid-Forming Converters

Hussein Jaffal, Arianna Fois, Sarra Bouchkati, Amirali Mahjoob, Andreas Ulbig

This paper investigates physics-informed neural networks for modeling the full dynamic behavior of droop-controlled grid-forming converters. The approach is trained on synthetic data generated via numerical solvers and benchmarked against both traditional integration methods and…

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arxiveess.SYcs.AI2026-07-17

Robustness of Reinforcement Learning-Based Congestion Management in Low-Voltage Grids

Josef Hoppe, Sarra Bouchkati, Farah Nasr, Jonathan Krapp, Alexander Och, Maximilian Wirth, et al.

Increases in photovoltaic generation, charging of electric vehicles and heat-pump demand challenge operating limits in low-voltage distribution grids. This requires curative curtailment methods that can operate under sparse observability, noisy measurements, and imperfect grid mo…

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