CRIS Current Research Information System

Universal Interlinking Converter for Prosumer DC Buildings: Operation with Different DC Grid Types

With the growing adoption of dc microgrids across various applications, the demand for flexible and adaptable power electronics solutions is becoming increasingly important. To address this gap in the literature, this paper presents a universal ac-dc power converter capable of integrating the ac power distribution with both unipolar (350 Vdc) and bipolar (± 350 Vdc) dc microgrids. Usually, such a converter is referred as a dc grid-forming or interlinking converter and is generally composed of...

Cycle-Skipping Technique Based on Sigma-Delta Modulation in Series Resonant DC Transformer

This paper investigates a cycle-skipping modulation technique based on sigma-delta modulation to improve the performance of series resonant converters, particularly those operating as a dc transformer. Compared to burst mode control, sigma-delta modulation provides a higher equivalent frequency at the output, which significantly reduces output voltage and current ripples. While dc transformer converters typically operate at a constant power with limited power regulation capabilities, the appl...

Dynamic Demonstrations Selection for Few-Shot Legal Argument Mining

The selection of demonstrations for few-shot learning plays a pivotal role in the performance of LLMs. In the legal domain, selecting these examples becomes especially critical, since they must be both informative and economical. We address legal argument mining by adopting dynamic selection strategies where a specific set of demonstrations is selected for each inference, and we compare them to static approaches where examples are chosen by experts or by the LLMs themselves. We experiment wit...

Evidence of blueschist facies shortening in the Jabal Akhdar tectonic window, northern Oman