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Buch
Modeling Static Grid Equivalent with Artificial Neural Networks Including Optimally Designed Local Reactive Power Control
(kassel university press, 2024)
During the energy system transition, the rapid increase in distributed energy resources (DERs) can cause grid congestion problems in power grids, such as voltage problems and overloads. It has become increasingly important to intelligently control the provision of reactive power from DERs to power grids, which not only stabilizes voltage, reduces loading and grid losses, but also provides reactive power flexibility to different points in power grids. As power grids are interconnected and operated by different grid ...
Buch
Improving the Security-Constrained Operative Planning of Flexibilities in Distribution Grids Using Artificial Intelligence and High-Performance Grid Calculation
(kassel university press, 2024)
The penetration from renewable distributed energy resources (DERs) such as wind and solar massively increases the risk of grid congestions on transmission lines/transformers and voltage violations. To guarantee grid security, the operators must perform grid congestion management (GCM), e.g., with active power curtailment from DERs in the operative planning and real-time phases. Compared to the real-time GCM, for grid operative
planning, grid congestions must be identified through forecasting-based grid simulations. ...
Buch
Integrierter Modellrahmen zur konstitutiven Beschreibung der gekoppelten visko–ferroelektrischen Dissipation sowie Identifikation und Analyse von Kreisprozessen zur effizienten Energiewandlung
(kassel university press, 2024)
Zentraler Gegenstand dieser Arbeit ist die theoretische Untersuchung der gekoppelten Dissipation aufgrund von Domänenschalten und der Viskoelastizität sowie der damit einhergehenden Erwärmung. Dafür wird ein hybrides mikrophysikalisch–rheologisches konstitutives Modell entwickelt und in einen Multiskalenansatz eingebettet. Dabei werden sowohl Korninteraktionen, elektrische und mechanische Eigenfelder als auch korneigene Schaltbarrieren berücksichtigt. Die mathematische Theorie wird vor dem Hintergrund der rationalen ...