Publications de Nicolo' Riva | EPFL Graph Search

Optical fibre based quench detection in HTS applications using machine learning classifiers

Nicolo' Riva, Arooj Akbar, Bertrand Dutoit, Bertrand Dutoit

A Mach-Zehnder Interferometer (MZI) based optical fibre sensing technique, developed and patented by EPFL, is an efficient and economical way to detect hotspots in High Temperature Superconductor (HTS) applications. Due to the MZI sensitivity being a compo ...

Elsevier2022

Optimization Method for Extracting Stabilizer Geometry and Properties of REBCO Tapes

Francesco Grilli, Nicolo' Riva, Arooj Akbar, Bertrand Dutoit, Bertrand Dutoit

A good knowledge of material properties is a critical aspect for modeling high-temperature superconductor (HTS) devices. However, the electrical resistivity of coated conductors above the critical current is limited. The major challenge in characterizing t ...

2021

Superconductors for power applications: an executable and web application to learn about resistive fault current limiters

Francesco Grilli, Nicolo' Riva, Bertrand Dutoit, Bertrand Dutoit

High-temperature superconductors (HTS) can be superconducting in liquid nitrogen (77 K) at atmospheric pressure, which holds immense promises for our future such as nuclear fusion, compact medical devices and efficient power applications. In a power system ...

2021

Fast Hotspot Detection in SFCLs by Exploiting Strain Response in Optical Fiber Sensing

Luc Thévenaz, Nicolo' Riva, Zhisheng Yang, Arooj Akbar, Bertrand Dutoit, Bertrand Dutoit

Superconducting fault current limiters (SFCLs) can be used to limit fault currents in both meshed DC and AC grids by transitioning from superconducting to resistive state, in the presence of high currents. While the device is theoretically a great way to p ...

IEEE Institute of Electrical and Electronics Engineers2021

Optimization Method for Extracting Stabilizer Geometry and Properties of REBCO Tapes

Nicolo' Riva, Arooj Akbar, Bertrand Dutoit

A good knowledge of material properties is a critical aspect for modeling high-temperature superconductor (HTS) devices. However, the knowledge of the electrical resistivity of coated conductors above the critical current is limited. The major challenge in ...

IEEE Institute of Electrical and Electronics Engineers2021

Quench behavior of high-temperature superconductor tapes for power applications: a strategy toward resilience

Nicolo' Riva

High-Temperature Superconductors (HTS) can be superconducting in liquid nitrogen 77 K, holding immense promises for our future. They can enable disruptive technologies such as nuclear fusion, lossless power transmission, cancer treatment devices, and techn ...

EPFL2021

Resistivity of REBCO tapes in overcritical current regime: impact on superconducting fault current limiter modeling

Francesco Grilli, Nicolo' Riva, Bertrand Dutoit, Frédéric Sirois, Bertrand Dutoit

A detailed knowledge of the resistivity of high-temperature superconductors in the overcritical current regime is important to achieve reliable numerical simulations of applications such as superconducting fault current limiters. We have previously shown t ...

2020

Overcritical Current Resistivity of YBCO-Coated Conductors Through Combination of PCM and Finite-Element Analysis

Francesco Grilli, Nicolo' Riva, Bertrand Dutoit, Bertrand Dutoit

Understanding the electro-thermal behavior of high-temperature superconductor (HTS) materials is a critical aspect for designing efficient and reliable applications. In order to optimize cost and performance, one needs to understand the role played by the ...

IEEE Institute of Electrical and Electronics Engineers2019

Study of a Superconducting Magnetic Diverter for the ATHENA X-Ray Space Telescope

Nicolo' Riva

IEEE Institute of Electrical and Electronics Engineers2018