Research Article
Magnetostriction Assessment with Strain Gauges and Fiber Bragg Gratings
@ARTICLE{10.4108/eai.13-7-2018.161420, author={Cassiano C. Linhares and Jo\"{a}o Esp\^{\i}rito Santo and Ricardo R. Teixeira and Cristiano P. Coutinho and S\^{e}rgio M.O. Tavares and Marta Pinto and Jo\"{a}o S. Costa and Helder Mendes and Catarina S. Monteiro and Ant\^{o}nio V. Rodrigues and Orlando Fraz\"{a}o}, title={Magnetostriction Assessment with Strain Gauges and Fiber Bragg Gratings}, journal={EAI Endorsed Transactions on Energy Web}, volume={7}, number={25}, publisher={EAI}, journal_a={EW}, year={2019}, month={11}, keywords={Epstein Frame, FBGs, Magnetostriction, Noise, Power Transformers, Strain Gauges}, doi={10.4108/eai.13-7-2018.161420} }- Cassiano C. Linhares
João Espírito Santo
Ricardo R. Teixeira
Cristiano P. Coutinho
Sérgio M.O. Tavares
Marta Pinto
João S. Costa
Helder Mendes
Catarina S. Monteiro
António V. Rodrigues
Orlando Frazão
Year: 2019
Magnetostriction Assessment with Strain Gauges and Fiber Bragg Gratings
EW
EAI
DOI: 10.4108/eai.13-7-2018.161420
Abstract
Power transformers have an imperative role in the future developments of the electrical grids. Treated as crucial assets for transportation and distribution of electrical energy, transformers are currently being studied regarding to the integration of technologies aiming to diagnose problems and monitoring data of electrical power grid. Furthermore, environmental noise pollution has gained importance, especially in active units of the power grid, located near consumers, such as transformers. Transformers noise can be classified according to its source: core, windings and cooling. This study addresses an experimental characterization of one of the main causes of transformers core noise - magnetostriction of electrical steel. An evaluation of magnetostriction properties of electrical steel, including resistive strain gauges and Fiber Bragg Gratings (FBGs) measurements with an Epstein frame, are presented and discussed. The magnetic flux density influence on hysteretic strain behavior of magnetostriction was evaluated, as well as the effect of a clamping load on core joints. Nowadays, optical interrogators for Bragg gratings have a high acquisition frequencies and wavelength sensitivity when compared to former optical interrogation systems, allowing to evaluate physical phenomena without electromagnetic interference and with equivalent resolution of conventional strain gauges.
Copyright © 2019 Cassiano C. Linhares et al., licensed to EAI. This is an open access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/), which permits unlimited use, distribution and reproduction in any medium so long as the original work is properly cited.
