Publications associées à Power Losses Measurement Method for High Efficiency MV Oil-Insulated DC-DC Converter

Publications associées (16)

Active Filtering of Second-Order Harmonic in Two-Stage Single-Phase AC/DC Converters with Frequency Modulated Series-Resonant Converters

Series Resonant Converters allow an efficient, galvanically isolated, and load-independent DC/DC conversion, and can be used as isolation DC/DC units in two-stage single-phase AC/DC converters. However, in such systems, the single-phase Active Front End un ...

Institute of Electrical and Electronics Engineers (IEEE)2025

Techno-Economic Analysis of a Supercritical Gas Turbine Energy System Fueled by Methanol and Upgraded Biogas

Chiara Berretta

The HERMES project investigates the utilization of surplus wind and solar energy to produce renewable fuels such as hydrogen, methane, and methanol for seasonal storage, thereby supporting carbon neutrality and the energy transition. This initiative aims t ...

2025

Embracing wind power in the solar PV-dominated Swiss landscape

Christophe Ballif, Nicolas Würsch, Alejandro Pena Bello, Marine Dominique Cauz

The Swiss energy transition, characterized by the nuclear phase-out, relies mainly on the integration of solar photovoltaic (PV), mostly because wind technology faces challenges in local public acceptance. This study aims to analyse Swiss PV and wind gener ...

Elsevier BV2025

Development of a high current density, high temperature superconducting cable for pulsed magnets

Kamil Sedlák, Manuel Holenstein, Markus Jenni

A low-AC loss Rare-earth barium copper oxide (REBCO) cable, based on the VIPER cable technology has been developed by commonwealth fusion systems for use in high-field, compact tokamaks. The new cable is composed of partitioned and transposed copper ‘petal ...

IOP Publishing Ltd2024

Tower-foot grounding model for EMT programs based on transmission line theory and Marti's model

Rafael Silva Alipio

This paper proposes a tower-foot grounding system model compatible with EMT programs which might be useful for the simulation of lightning transients in overhead lines. The proposed model is based on the solution of the telegrapher's equations and the appl ...

Elsevier2023

Design Optimization of a MW-level Medium Frequency Transformer

Drazen Dujic, Nikolina Djekanovic

Nowadays, with the increased interest in applications dealing with high-power medium-voltage conversion, there is a strong need to master the design of medium-frequency transformers, which are one of the key components of modern DC transformers. The paper ...

2022

Flexibilisation of Biogas-Based Power-to-Gas Processes: A Techno-Economic and Experimental Assessment

Andreas Gantenbein

Biogas-based power-to-X technology allows storing renewable electricity, while producing CO2-neutral products. This work investigates the conversion and upgrading of digestion-derived gas mixtures with focus on increasing the operational flexibility of the ...

EPFL2022

Performance assessment of grid-forming and grid-following converter-interfaced battery energy storage systems on frequency regulation in low-inertia power grids

Mario Paolone, Sidi-Rachid Cherkaoui, Fabrizio Sossan, Yihui Zuo, Antonio Zecchino, Zhao Yuan

Power systems with large shares of converter-interfaced renewables may be characterised by low grid inertia due to the lack of frequency containment provided by synchronous generators. Battery energy storage systems (BESSs), which can adjust their power ou ...

2021

97.4%-Efficient All-GaN Dual-Active-Bridge Converter with High Step-up High-Frequency Matrix Transformer

Elison de Nazareth Matioli, Armin Jafari, Mohammad Samizadeh Nikooytabalvandani, Palliyage Srilak Nirmana Perera

In this work, we demonstrate a state-of-the-art high step-up/down dual-active-bridge (DAB) converter designed with GaN transistors, to achieve a high efficiency and large power-density. A quasi-planar matrix transformer with high step-up/down ratio is demo ...

2020

Effect of voltage source converters with electrochemical storage systems on dynamics of reduced-inertia bulk power grids

Mario Paolone, Fabrizio Sossan, Yihui Zuo

A major concern associated to the massive connection of distributed energy resources is the increasing share of power electronic interfaces resulting in the global inertia reduction of power systems. The recent literature advocated the use of voltage sourc ...

Elsevier2020

A Bidirectional Buffered Charging Unit for EV's (BBCU)

Alfred Rufer

A bidirectional buffered charging unit for EV's is presented, allowing the charge with high power even if the line current capability is limited. The bidirectional buffer is connected to the AC line and is mainly dedicated to vehicles with on-board AC-DC c ...

IEEE2018

645 V quasi-vertical GaN power transistors on silicon substrates

Elison de Nazareth Matioli, Riyaz Mohammed Abdul Khadar, Chao Liu

In this paper, we present GaN-on-Si vertical transistors consisting of a 6.7 pm thick n-p-n heterostructure grown on 6-inch silicon substrates by MOCVD. The fabricated vertical trench gate MOSFETs exhibited E-mode operation with a threshold voltage of 3.3 ...

2018

An Adaptive Model-Based Real-time Voltage Control Process for Active Distribution Networks Using Battery Energy Storage Systems

Mario Paolone, Sidi-Rachid Cherkaoui, Dimitri Torregrossa, Maryam Bahramipanah

The paper presents a centralized real-time adaptive and model-based voltage control algorithm for Active Distribution Networks (ADNs). Differently from the available literature, the proposed algorithm merely relies on the control of Battery Energy Storage ...

Università degli Studi di Genova, Italy2016

High-Power High-Voltage Isolated DC-DC Converters using an NPC Balanced Capacitive Divider

Alfred Rufer

A new isolated DC-DC converter is presented suited for high voltage applications. It is based on the series connection of NPC inverter cells, using semiconductor devices with lower voltage blocking capability than the total input voltage. The galvanic isol ...

2015

Today’s and Tomorrow’s Meaning of Power Electronics within the Grid Interconnection

Alfred Rufer

Power Electronics is expected to become a major component in the field of the global electric power management, as it is already today within most of electric power applications like variable speed drives or other conventional user applications. From the e ...

2007

Multichannel DC-DC Converter’s Efficiency Optimisation by variable Number of active Channels

Alfred Rufer, Sylvain Lemofouet-Gatsi

In the context of energy storage with supercapacitors, the so called round trip efficiency is an important factor that can be strongly affected by the characteristics or performances of the used converter. This paper presents a dedicated DC-DC converter, w ...

2006