The 10 most recently published documents
Hosting capacity quantification intends to provide the maximum aggregated capacity of distributed generation in low-voltage grids. Given the nonlinear nature of this problem, finding a solution in a simple and effective manner remains challenging. Moreover, previous studies have shown that solutions often display high disparities in hosting capacities among individual nodes, penalizing some and favoring others. Such disparities raise fairness concerns. In this paper, we propose a sequential linear optimization method to quantify the PV hosting capacity in low-voltage grids to address these issues. The linear formulation is achieved by using sensitivity matrices that approximate linear relations between changes in voltage and current magnitudes due to changes of PV capacities. To mitigate inaccuracies due to the linear formulation, multiple optimization problems are solved sequentially, updating the grid state at each stage with an AC power flow to realign the solution with the nonlinear problem. The performance of the proposed method is showcased using the CIGRE European low-voltage grid and by comparison with other established methods. To draw conclusions on a large and realistic dataset, the hosting capacities of 5196 low-voltage feeders from Austria are quantified under varying levels of disparity allowances.
Net Working Capital Simulation: Auswirkungen von Zahlungszielveränderungen auf Bilanz und Cashflow
(2025)
The electrification of public transport introduces significant challenges for battery electric bus (BEB) fleet operators and power grid operators. This paper investigates the potential of two charging optimization strategies to reduce peak power demand in a BEB depot in Vorarlberg, Austria. A heuristic algorithm and Mixed-Integer Linear Programming (MILP) are analyzed and
compared to a reference strategy representing uncoordinated charging. The study aims to minimize peak power demand while ensuring efficient use of charging infrastructure. The results demonstrate the effectiveness of intelligent charging management in addressing the challenges posed by BEB operations.
Die Abschlussarbeit „Mich schreibend erkunden“ behandelt die Grundlagen und Methoden der Integrativen Poesie- und Bibliotherapie. Diese Form der Therapie berücksichtigt körperliche, emotionale, geistige und soziale Faktoren und nutzt kreative Medien wie Poesie und Literatur zur Förderung von persönlichem Wachstum und Heilung. Ein zentraler Bestandteil ist das Modell der „Fünf Säulen (des Supports) der Identität“, das verschiedene Dimensionen der Identität umfasst. Der geplante Workshop für Studierende der Rehabilitationspsychologie integriert diese Elemente.
Canalization is an optical phenomenon that enables unidirectional light propagation without predefined waveguiding designs. Recently demonstrated using phonon polaritons in twisted van der Waals (vdW) layers of α-MoO3, it offers unprecedented possibilities for controlling light-matter interactions at the nanoscale. However, practical applications have been hindered by the complex sample fabrication of twisted stacks. In this work, we introduce a previously unexplored canalization phenomenon in a single-thin vdW layer (α-MoO3) interfaced with a substrate exhibiting a given negative permittivity. This enables a proof-of-concept application of polariton canalization: super-resolution nanoimaging (~λ0/220). Canalization-based imaging transcends conventional projection constraints, allowing the super-resolution images to be obtained at any desired location in the image plane. This versatility stems from the synergetic manipulation of three key parameters: incident frequency, rotation angle of the thin vdW layer, and thickness. Our results provide insights into the properties of canalization and constitute a seminal step toward multifaceted photonic applications, including imaging, data transmission, and ultracompact photonic integration.
