Studies of arc discharges for gas circuit breakers

2013 Fiscal Year Final Research Report

• Project/Area Number: 23760262
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Kyushu University
• Principal Investigator: TOMITA KENTARO 九州大学, 総合理工学研究科(研究院), 助教 (70452729)
• Project Period (FY): 2011 – 2013
• Keywords: アーク放電プラズマ / レーザートムソン散乱法 / 電子密度 / 電子温度 / 金属蒸気

Research Abstract

Gas circuit breakers (GCBs) are one of the most important components for high voltage power system. For high voltage circuit breaker rated at more than 72 kV, high-pressure SF6 gas is commonly used as arc quenching medium. However, SF6 has very high global warming potential. It has thus been desired to search for alternative gases for SF6. For effective searching and/or development of such alternative gases, diagnostics of arc discharges generated inside GCBs are essentially crucial. Especially, precise measurements of electron density in a decaying arc discharge in transient state are indispensable.
In order to measure electron density in arcs, in this study, laser Thomson scattering has been applied to arcs generated with several types of gases and polymer materials, which are used around electrodes. As a result of the measurement, clear differences of spatiotemporal evolutions were found for arcs generated with different conditions.

Research Products

• [Journal Article] Thomson scattering diagnostics of decay processes of Ar/SF6 gas-blast arcs confined by a nozzle (2013)
  • Author(s): K. Tomita, D. Gojima, K. Nagai, K. Uchino, R. Kamimae, Y Tanaka, K. Suzuki, T. Iijima, T. Uchii, T. Shinkai
  • Journal Title: J. Phys. D Appl. Phys. (Fast Track Communications) Volume: Vol. 46 Pages: 382001 (5)
  • Peer Reviewed
• [Journal Article] トムソン散乱法による金属蒸気混入アーク放電プラズマの電子密度・電子温度計測 (2013)
  • Author(s): 富田健太郎,吉武真称,内野喜一郎,竹中大悟,戸田弘明,匹田政幸,鈴木克己
  • Journal Title: 電気学会論文誌A Volume: Vol. 133(9) Pages: 458-464
  • Peer Reviewed
• [Presentation] 協同的トムソン散乱法によるノズル空間内Ar/SF_<6 >ガス吹付けアーク減衰過程の電子密度 (2013)
  • Author(s): 富田健太郎,合嶋大輔,永井和彦,内野喜一郎,上前涼,田中康規,鈴木克己,飯島崇文,内井敏之,新海健
  • Organizer: 電子温度計測,放電・静止器・開閉保護合同研究会
  • Place of Presentation: 沖縄
  • Year and Date: 2013-06-24
• [Presentation] 協同的トムソン散乱法による大気圧減衰アークの電子密度 (2013)
  • Author(s): 富田健太郎,内野喜一郎
  • Organizer: 電子温度測定,電気学会北陸支部シンポジウム
  • Place of Presentation: 石川
  • Year and Date: 2013-03-06
• [Presentation] 協同的トムソン散乱法による遮断器内アーク放電の研究 (2012)
  • Author(s): 富田健太郎、合嶋大輔、内野喜一郎、匹田政幸、竹中大悟、戸田弘明、鈴木克己、内井敏之
  • Organizer: 放電・静止器・開閉保護合同研究会
  • Place of Presentation: 愛知
  • Year and Date: 2012-06-25