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Development of ultra-high voltage insulation technology for the power supply components in neutral beam system on ITER
https://repo.qst.go.jp/records/72258
https://repo.qst.go.jp/records/722588cf7fddf-df9a-499a-9f24-94a3a7e6e7bf
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-03-30 | |||||
| タイトル | ||||||
| タイトル | Development of ultra-high voltage insulation technology for the power supply components in neutral beam system on ITER | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
梅田, 尚孝
× 梅田, 尚孝× 柏木, 美恵子× 戸張, 博之× 小島, 有志× 大楽, 正幸× 花田, 磨砂也× 前島, 哲也× 渡邊, 和弘× 山中, 晴彦× 梅田 尚孝× 柏木 美恵子× 戸張 博之× 小島 有志× 大楽 正幸× 花田 磨砂也× 前島 哲也× 渡邊 和弘× 山中 晴彦 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Dc ultra-high voltage insulation technologies in oil, gas and vacuum have been newly developed to fabricate dc 1MV power supply components in the neutral beam (NB) system on ITER. In the ITER NB system, a 1 MV power supply with pulse duration of 3600 s is required, which is twice higher in the voltage and two orders longer in the pulse than those of the existing NB system in the world. To fulfill the requirements, R&D of the insulation technology has carried out for the DC generator, transmission line and HV bushing. One of the issues for the DC generator is that electric field strength on the pressboard immersed in oil is increased with time, and this could cause flashover. To lower the electric field strength in the pressboard, a new pressboard which has thicker and multi-layer structure has been developed. For the 1 MV transmission line, an issue is to make a compact transmission line since it penetrates tokamak building. To make the compact transmission line, all feeders at different voltages are designed within a single pressure vessel filled with pressurized insulation gas. The layout of the feeders is designed with 3D electrical analysis to reduce electric field to an allowable level. For a HV bushing which has five stage gaps in vacuum, voltage holding capability in the multistage gaps has been found to be characterized by a total cathode area. On the basis of the result, the five layered screens of the HV bushing were determined. Based on these insulation technologies, manufacturing of the three DC generators, the transmission line and the HV bushing has completed. These components have showed the sufficient voltage holding to be required by ITER. They have delivered to the site of NB Test Facility and installation has started since Dec, 2015 on schedule. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 26th IAEA Fusion Energy Conference | |||||
| 発表年月日 | ||||||
| 日付 | 2016-10-19 | |||||
| 日付タイプ | Issued | |||||
