Development of Optical Current Transformers with the Portions of Free Gas Space Propagation of Light
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- Kobayashi Shigeyuki
- Chubu Electric Power Co., Inc.
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- Takagi Isao
- Chubu Electric Power Co., Inc.
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- Horide Akihiko
- Chubu Electric Power Co., Inc.
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- Higaki Masaru
- Hitachi Ltd.
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- Takahashi Genji
- Hitachi Ltd.
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- Yamagiwa Tokio
- Hitachi Ltd.
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- Mori Etsunori
- Hitachi Ltd.
Bibliographic Information
- Other Title
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- 光空間伝送部を有する光電流変成器の開発
- ヒカリ クウカン デンソウブ オ ユウスル コウデンリュウ ヘンセイキ ノ カ
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Abstract
Recently, Optical current and voltage measuring systems based on measuring principles different from those of traditional apparatus have been developed actively. This paper deals with the development of an optical current transformer (CT), whose optical signal transmission system has some portions of free space light propagation, for its application to gas insulated switchgear (GIS).<br>The analyses of free space light propagation through plano-convex lenses or micro-lenses were carried out firstly and compared with the measured values. Then, the piano-convex lens system was confirmed to be preferable to long distance light transmission in free space. Using an optical CT with the piano-convex lens system, optical loss distribution in the light transmission system was investigated, and total optical loss of less than 20 dB was obtained. Finally, an optical CT system with light transmission in SF6 gas space was developed and incorporated into a full-scale 77 kV GIS model. Test results for the optical CT system showed that it has excellent measuring characteristics conformed with JEC 1201. No variation of current measuring characteristics was observed during long-term field tests.
Journal
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- IEEJ Transactions on Power and Energy
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IEEJ Transactions on Power and Energy 111 (9), 999-1006, 1991
The Institute of Electrical Engineers of Japan
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Details 詳細情報について
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- CRID
- 1390001204604636672
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- NII Article ID
- 130006841122
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- NII Book ID
- AN10136334
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- ISSN
- 13488147
- 03854213
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- NDL BIB ID
- 3730125
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed