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Development of an interrupting chamber for 1000‐kV high‐speed grounding switches
Author(s) -
Yamagata Yoshibumi,
Terasawa Yoshinori,
Mizoguchi Hitoshi,
Hioki Isao,
Yokota Takeshi,
Kojima Soji,
Ikeda Hisatoshi
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(199706)119:4<12::aid-eej2>3.0.co;2-m
Subject(s) - circuit breaker , electrical engineering , ground , current (fluid) , interrupt , sulfur hexafluoride circuit breaker , fault (geology) , arc (geometry) , span (engineering) , line (geometry) , electric power transmission , current limiting , engineering , voltage , short circuit , transient (computer programming) , transient recovery voltage , arc fault circuit interrupter , computer science , transmission (telecommunications) , power factor , mechanical engineering , geology , structural engineering , mathematics , geometry , seismology , operating system , constant power circuit
In Japan, construction of 1000 kV (UHV) transmission lines is planned in order to deal with the expected increase of electric power demand. On the line, after the fault current is interrupted by circuit breakers, the arc caused by electrostatic induction current remains for a long time because of its high voltage. To re‐energize the fault line after arc extinction, a new circuit breaker reclosing system which has high‐speed grounding switches (HSGS) installed at both ends of the line is employed. If, while the HSGS is interrupting an electromagnetic induction current, a ground fault takes place in another energized line, causing a shirt‐circuit current including a dc component to flow, the large dc component is superimposed on the HSGS current, producing a zero shifting state with no passage through the zero point for long time. Such zero shifting durations are estimated to be up to about 80 ms. Therefore HSGS are required to interrupt this delayed zero current as a special duty. This requirement is met by a newly developed puffer interrupting chamber allowing a long pressure rise by optimizing the exhaust and residual volume of the puffer cylinder and utilizing the effect of pressure rise due to the arc. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 119(4): 12–21, 1997