7 citations · 10 across the 10 of their papers we have counts for
10 papers
Influence of Controller Tuning on Cascaded Flexibility Provision with Feedback Optimization
Irina Zettl, Florian Klein-Helmkamp, Florian Schmidtke +2
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 distributio…
Momentum-Accelerated Online Feedback Optimization for Power System Flexibility
Florian Klein-Helmkamp, Matthis Berger, Irina Zettl +1
Flexibility is increasingly gaining importance in modern power system operation. This paper presents a controller framework based on Online Feedback Optimization for real-time coor…
Dynamic Modeling, Analysis, and Validation of Dual-Port Grid-Forming Control for Hybrid AC/DC Systems
Irina Subotić, Dominic Groß, Alexander Winkens +3
This work investigates the transient and dynamical behavior of hybrid AC/DC systems using dual-port grid-forming (GFM) control. A generalized modeling framework for hybrid AC/DC ne…
Stability and Performance of Online Feedback Optimization for Distribution Grid Flexibility
Florian Klein-Helmkamp, Tina Möllemann, Irina Zettl +1
The integration of distributed energy resources (DERs) into sub-transmission systems has enabled new opportunities for flexibility provision in ancillary services such as frequency…
Graph-based Impact Analysis of Cyber-Attacks on Behind-the-Meter Infrastructure
Immanuel Hacker, Ömer Sen, Florian Klein-Helmkamp +1
Behind-the-Meter assets are getting more interconnected to realise new applications like flexible tariffs. Cyber-attacks on the resulting control infrastructure may impact a large…
Safe Trajectory Sets for Online Operation of Power Systems under Uncertainty
Florian Klein-Helmkamp, Tina Möllemann, Irina Zettl +2
Flexibility provision from active distribution grids requires efficient and robust methods of optimization and control suitable to online operation. In this paper we introduce cond…
Tuning a Cascaded Online Feedback Optimization Controller for Provision of Distributed Flexibility
Irina Zettl, Florian Klein-Helmkamp, Florian Schmidtke +2
Coordinating a high number of flexibility providing units (e.g. to provide ancillary services for the transmission system) across various grid layers requires new control concepts.…
Hierarchical Provision of Distribution Grid Flexibility with Online Feedback Optimization
Florian Klein-Helmkamp, Irina Zettl, Florian Schmidtke +2
Utilizing distribution grid flexibility for ancillary services requires the coordination and dispatch of requested active and reactive power to a large number of distributed energy…
Tuning and Testing an Online Feedback Optimization Controller to Provide Curative Distribution Grid Flexibility
Lukas Ortmann, Fabian Böhm, Florian Klein-Helmkamp +3
Due to more volatile generation, flexibility will become more important in transmission grids. One potential source of this flexibility can be distribution grids. A flexibility req…
Providing Curative Distribution Grid Flexibility Using Online Feedback Optimization
Florian Klein-Helmkamp, Fabian Böhm, Lukas Ortmann +5
Distribution grid flexibility is discussed as a possible measure in curative system operation, yielding a need for an efficient and robust coordination mechanism for the joint flex…