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Quenching current level coordination in superconducting power transmission systems
Author(s) -
Tang YueJin,
Yokomizu Yasunobu,
Hayakawa Naoki,
Goto Yasuyuki,
Matsumura Toshiro,
Okubo Hitoshi,
Kito Yukio
Publication year - 1994
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/eej.4391140507
Subject(s) - overcurrent , electrical engineering , overvoltage , quenching (fluorescence) , superconductivity , surge arrester , fault (geology) , electric power system , transmission (telecommunications) , power transmission , electric power transmission , current (fluid) , lightning arrester , transmission system , voltage , materials science , engineering , power (physics) , physics , condensed matter physics , quantum mechanics , seismology , geology , fluorescence
In the present power transmission system, electric power devices are equipped under the concept of insulation coordination and are protected from lightning overvoltage and switching surge by the arrester. However, the future superconducting power transmission system is characterized by the heavy current transmission capability, the lower transmission loss and lightning‐surge‐free circumstances. Thus, in the superconducting power transmission system, superconducting devices should be protected rather from quenching by the overcurrent of a short‐circuit fault than from the breakdown by over‐voltage. In this paper, a new concept of the coordination for the superconducting transmission system is proposed as a “quenching current level coordination” instead of the insulation coordination. Furthermore, it is pointed out that the quenching current level coordination has the duality relationship with the present insulation coordination. A superconducting fault current limiter should play an important part of the quenching current level coordination to prevent the other superconducting devices from quenching.