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Global Temperature Sensing for an Operating Power Transformer Based on Raman Scattering

Traditional monitoring methods cannot obtain the overall thermal information for power transformers. To solve this problem, a distributed fiber optic sensor (DFOS) was creatively applied inside an operating 35 kV power transformer by highly integrating with the electromagnetic wires. Then, the trans...

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Detalles Bibliográficos
Autores principales: Liu, Yunpeng, Li, Xinye, Li, Huan, Fan, Xiaozhou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7506647/
https://www.ncbi.nlm.nih.gov/pubmed/32872632
http://dx.doi.org/10.3390/s20174903
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author Liu, Yunpeng
Li, Xinye
Li, Huan
Fan, Xiaozhou
author_facet Liu, Yunpeng
Li, Xinye
Li, Huan
Fan, Xiaozhou
author_sort Liu, Yunpeng
collection PubMed
description Traditional monitoring methods cannot obtain the overall thermal information for power transformers. To solve this problem, a distributed fiber optic sensor (DFOS) was creatively applied inside an operating 35 kV power transformer by highly integrating with the electromagnetic wires. Then, the transformer prototype with totally global sensing capability was successfully developed and it was qualified for power grid application through the strict ex-factory tests. The as designed optical fiber sensor works stably all the time with a temperature accuracy of ±0.2 °C and spatial positioning accuracy of 0.8 m. Based on the obtained internal temperature distribution, Gaussian convolution was further applied for the signal processing and hereby, the hotspots for all the windings and iron cores could be accurately traced. The hottest points were located at 89.1% (55 °C) of the high voltage winding height and 89.7% (77.5 °C) of the low voltage winding height. The actual precise hotspot location corrected the traditional cognition on the transformer windings and it would serve as an essential reference for the manufactures. This new nondestructive internal sensing and condition monitoring method also exhibits a promising future for the DFOS applying in the high-voltage electrical apparatus industry.
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spelling pubmed-75066472020-09-26 Global Temperature Sensing for an Operating Power Transformer Based on Raman Scattering Liu, Yunpeng Li, Xinye Li, Huan Fan, Xiaozhou Sensors (Basel) Article Traditional monitoring methods cannot obtain the overall thermal information for power transformers. To solve this problem, a distributed fiber optic sensor (DFOS) was creatively applied inside an operating 35 kV power transformer by highly integrating with the electromagnetic wires. Then, the transformer prototype with totally global sensing capability was successfully developed and it was qualified for power grid application through the strict ex-factory tests. The as designed optical fiber sensor works stably all the time with a temperature accuracy of ±0.2 °C and spatial positioning accuracy of 0.8 m. Based on the obtained internal temperature distribution, Gaussian convolution was further applied for the signal processing and hereby, the hotspots for all the windings and iron cores could be accurately traced. The hottest points were located at 89.1% (55 °C) of the high voltage winding height and 89.7% (77.5 °C) of the low voltage winding height. The actual precise hotspot location corrected the traditional cognition on the transformer windings and it would serve as an essential reference for the manufactures. This new nondestructive internal sensing and condition monitoring method also exhibits a promising future for the DFOS applying in the high-voltage electrical apparatus industry. MDPI 2020-08-30 /pmc/articles/PMC7506647/ /pubmed/32872632 http://dx.doi.org/10.3390/s20174903 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liu, Yunpeng
Li, Xinye
Li, Huan
Fan, Xiaozhou
Global Temperature Sensing for an Operating Power Transformer Based on Raman Scattering
title Global Temperature Sensing for an Operating Power Transformer Based on Raman Scattering
title_full Global Temperature Sensing for an Operating Power Transformer Based on Raman Scattering
title_fullStr Global Temperature Sensing for an Operating Power Transformer Based on Raman Scattering
title_full_unstemmed Global Temperature Sensing for an Operating Power Transformer Based on Raman Scattering
title_short Global Temperature Sensing for an Operating Power Transformer Based on Raman Scattering
title_sort global temperature sensing for an operating power transformer based on raman scattering
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7506647/
https://www.ncbi.nlm.nih.gov/pubmed/32872632
http://dx.doi.org/10.3390/s20174903
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