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Basic properties of hybrid gas‐insulated transmission lines (H‐GIL)
Author(s) -
Yashima Masafumi,
Kawamoto Tadashi,
Fujinami Hideo,
Takuma Tadasu,
Hata Hiroyuki,
Yamaguchi Hiroaki
Publication year - 1997
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(199705)119:3<27::aid-eej4>3.0.co;2-n
Subject(s) - transmission line , electric power transmission , reliability (semiconductor) , electrical engineering , line (geometry) , transmission (telecommunications) , arc flash , power transmission , power (physics) , materials science , automotive engineering , engineering , voltage , physics , thermodynamics , mathematics , geometry
The recent trend in electric power consumption shows a steady increase and concentration in large cities and industrial districts. This indicates a strong need for a long‐distance and enclosed‐type power transmission line with large capacity and high reliability. A hybrid gas‐insulated transmission line (H‐GIL), which has the combined features of an XLPE cable and a conventional gas‐insulated transmission line (GIL), has the potential to be applicable to such use. In the present work, we analyze the required dimension and the current capacity of H‐GIL on the basis of insulation and thermal design for various parameters determining the structure. We also report an experimental study on flashover characteristics for a simple electrode model of H‐GIL. The results show that the H‐GIL can be realized with almost the same sheath diameter and current capacity as a conventional GIL. The experiment has also clarified that the insulation reliability of the H‐GIL is much higher than that of a GIL. These properties show that the H‐GIL has enough feasibility applicable as a long‐distance and reliable transmission line with large capacity especially in urban areas. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 119(3): 27–39, 1997