Abstract
In this paper, the view of the magnetic linkage between other leg windings of a three-phase three-leg core-type transformer core is clarified. In a three-phase three-leg core-type transformer, even if the geomagnetically induced current of a quasi- direct current by the magnetic storm flows in, the asymmetrical DC magnetization of the core is not carried out at all. In a zigzag-Y connection transformer, it can restrict to a three-phase three-leg core transformer, and single-phase load can be taken between the terminal of a secondary Y connection, and a neutral point.
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