文部科学省大学間連携共同教育推進事業「未来像を自ら描く電気エネルギー分野における実践的人材の育成」
Understanding the Ageing Performance of Alternative Dielectric Fluids [11月10日（木）九州工業大学]
2022/11/10
【科目種別】電気エネルギー工学特論（英語科目）
■講師：Prof. Alfredo Ortiz Fernández
（所属）Universidad de Cantabria，スペイン
■演題：Understanding the Ageing Performance of Alternative Dielectric Fluids
■日時：2022年11月10日（木）16：20〜 17：50
■場所：九州工業大学 戸畑キャンパス
教育研究10号棟2階201室 ＆ Zoomハイブリッド
■主催：九州工業大学 工学部 電気電子工学科
■申込/お問合せ：小迫雅裕（kozako(アットマーク)ele.kyutech.ac.jp）
申込締切：11月9日（水）
■概要： Mineral oil has traditionally been used as a cooling fluid in power transformers, but its low biodegradability and low fire point have motivated the search of alternatives. In this presentation, the results of the comparison of six different dielectric fluids will be shown, including four vegetable liquids, from sunflower, rapeseed, soybean, and palm, one synthetic ester and a mineral oil used for. These oils were subjected to an accelerated thermal ageing in glass vessels at 150ºC for four weeks (672 hours) in presence of Kraft insulating paper. Different oils parameters were measured during the ageing, i.e. breakdown voltage, dielectric dissipation factor, permittivity, DC resistivity, density, kinematic viscosity, flash and fire points, interfacial tension, acidity, and dissolved gases; additionally, the degree of polymerisation (DP) of the paper was measured. Results showed that the changes of the natural esters properties, except for the palm oil, were similar along the ageing time. Palm oil results were similar to those of the mineral oil, whereas synthetic ester showed a behaviour similar to natural esters. The kraft paper degradation was higher in the mineral oil, followed by the synthetic ester and the palm oil. No significant differences were found in the ageing with the natural esters.
■学生の関わり様：本講演では、欧州を中心に進められているBIOTRAFOプロジェクトの紹介に始まり、講師はそのプロジェクトリーダーでもある。ひまわり、菜種、大豆、パームの植物性4種と合成エステル1種、そして鉱油の計6種類の液体絶縁材料の各種特性を比較した結果が紹介された。今後の電力用変圧器における生分解性油の適用可能性が理解できた。講義後にはたくさんの質問があり，丁寧に答えて頂いた。
■講師：Prof. Alfredo Ortiz Fernández
（所属）Universidad de Cantabria，スペイン
■演題：Understanding the Ageing Performance of Alternative Dielectric Fluids
■日時：2022年11月10日（木）16：20〜 17：50
■場所：九州工業大学 戸畑キャンパス
教育研究10号棟2階201室 ＆ Zoomハイブリッド
■主催：九州工業大学 工学部 電気電子工学科
■申込/お問合せ：小迫雅裕（kozako(アットマーク)ele.kyutech.ac.jp）
申込締切：11月9日（水）
■概要： Mineral oil has traditionally been used as a cooling fluid in power transformers, but its low biodegradability and low fire point have motivated the search of alternatives. In this presentation, the results of the comparison of six different dielectric fluids will be shown, including four vegetable liquids, from sunflower, rapeseed, soybean, and palm, one synthetic ester and a mineral oil used for. These oils were subjected to an accelerated thermal ageing in glass vessels at 150ºC for four weeks (672 hours) in presence of Kraft insulating paper. Different oils parameters were measured during the ageing, i.e. breakdown voltage, dielectric dissipation factor, permittivity, DC resistivity, density, kinematic viscosity, flash and fire points, interfacial tension, acidity, and dissolved gases; additionally, the degree of polymerisation (DP) of the paper was measured. Results showed that the changes of the natural esters properties, except for the palm oil, were similar along the ageing time. Palm oil results were similar to those of the mineral oil, whereas synthetic ester showed a behaviour similar to natural esters. The kraft paper degradation was higher in the mineral oil, followed by the synthetic ester and the palm oil. No significant differences were found in the ageing with the natural esters.
■学生の関わり様：本講演では、欧州を中心に進められているBIOTRAFOプロジェクトの紹介に始まり、講師はそのプロジェクトリーダーでもある。ひまわり、菜種、大豆、パームの植物性4種と合成エステル1種、そして鉱油の計6種類の液体絶縁材料の各種特性を比較した結果が紹介された。今後の電力用変圧器における生分解性油の適用可能性が理解できた。講義後にはたくさんの質問があり，丁寧に答えて頂いた。
