Study of repeated breakdown properties of nitrogen gas and the optimal condition for use of the alternative insulating gas to SF_6

氮气反复击穿特性及SF_6替代绝缘气体最佳使用条件研究

• 批准号: 17360131
• 负责人: YUMOTO Motoshige
• 金额: $ 9.09万
• 依托单位: Musashi Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360131/
• 关键词: Nitrogen; Active species; Repeated Breakdown; Primary electron; Delay time of breakdown; De-activation; Electron attachment; Work function; 繰返し絶縁破壊; 寿命; 破壊確率; 破壊遅れ時間; 高気圧

Nitrogen gas is expected to be used as the alternative gas of SF_6. However, nitrogen molecule has many meta-stable states which potential energy is high and its life time is very long. Accordingly, there is anxious to affect the breakdown properties by accumulation of those activated species.The purpose of this research is to clear the influence on the breakdown characteristics under accumulation of activated species and to search the optimum condition to use nitrogen gas as the alternative gas of SF_6.Breakdown probability and the delay time of breakdown were measured in enclosed vessel under high pressure up to 1.0 MPa. Some electrodes which work function was different from each other, were used for comparing the effect of activated species. The results showed that the influence was observed after the previous breakdown and its influence was observed when the electrode with low work function was used. From the results it was confirmed that the neutral activated species accumulated in the space affect the following breakdown properties up to 60s.To reduce the bad effect of the previous breakdown, small amount of NO or CO_2 was mixed in nitrogen. NO and CO_2 has a large cross section to de-excite nitrogen meta-stable states. The results showed that the influence was decreased less than 15s in case of NO mixture. However, its effect is not enough for the practical use. Then, small amount of SF_6 was mixed to attach electrons which introduce the breakdown. However, the results were similar to that of NO mixture. It is necessary to study further to use nitrogen gas as the alternating gas.

氮气有望作为SF_6的替代气体。然而，氮分子具有许多亚稳态，势能高，寿命长。本研究的目的是明确活性种积累对SF_6击穿特性的影响，寻找用氮气作为SF_6替代气体的最佳条件。在1.0MPa的高压下，在密闭容器中测量了SF_6的击穿概率和击穿延迟时间。采用功函数不同的电极，比较了活化物种的作用效果。结果表明，在前一次击穿后观察到的影响，它的影响时，观察到使用具有低功函数的电极。实验结果表明，在60 s内，空间中积累的中性活性物种对后续击穿性能的影响很大。为了降低前期击穿的不利影响，在氮气中混入少量NO或CO_2。NO和CO_2对氮亚稳态的去激发截面较大。结果表明，在NO混合气体的情况下，这种影响减小到15s以内。然而，它的效果并不足以满足实际应用。然后，加入少量SF_6气体，使其附着电子，引起击穿。但其结果与NO混合物相似。用氮气作为替代气体还需进一步研究。

项目成果

PTFE表面改質時の極性基導入過程における窒素イオンの効果

PTFE表面改性过程中氮离子对极性基团引入过程的影响

• 发表时间: 2005
• 期刊: 電気学会 放電研究会資料 ED-05-146
• 作者: 石丸 陽介;岩尾 徹;湯本 雅恵
• 通讯作者: 湯本 雅恵

密閉容器中における窒素の絶縁破壊特性に及ぼす中性活性種の影響

中性活性物质对密闭容器中氮气介电击穿性能的影响

• 发表时间: 2005
• 期刊: 電気学会論文誌 A 125・10
• 作者: 村上 典央;湯本 雅恵
• 通讯作者: 湯本 雅恵

Influence of neutral active species on breakdown characteristics in closed space

中性活性物质对封闭空间击穿特性的影响

• 发表时间: 2005
• 期刊: IEE of Japan Trans.A Vol.125,No.10
• 作者: N.Murakami;M.Yumoto
• 通讯作者: M.Yumoto

Influence of repeatedly discharge for breakdown characteristics in compressed nitrogen gas

压缩氮气中反复放电对击穿特性的影响

• 发表时间: 2005
• 期刊: Proc.2005 Korea-Japan Joint Symo.Electrical Discharge and High Voltage Engineering
• 作者: Y.Kuroki;T.Iwao;M.Yumoto
• 通讯作者: M.Yumoto

Dose Dependence of Surface Hardness by Low Energy Ion Irradiation on PMMA

低能离子辐照 PMMA 表面硬度的剂量依赖性

• 发表时间: 2005
• 期刊: Proceedings of 17^<th> International Symposium on Plasma Chemistry
• 作者: M.Arai;E.Hatsugai;N.Hamamura;T.Iwao;M.Yumoto
• 通讯作者: M.Yumoto