APPARATUS, METHOD AND PROGRAM FOR VOLTAGE ADJUSTMENT

摘要

PROBLEM TO BE SOLVED: To adjust AC voltages with a plurality of phases which are applied to a load in a well-balanced state in transformers for distributing AC voltages with a plurality of phases to the load through a plurality of distribution lines.

SOLUTION: The voltage adjustment device is provided with a plurality of transformers arranged on a plurality of distribution lines for distributing AC voltages with a plurality of phases to the load and respectively having taps for switching load voltage to be applied to the load and a tap switch for switching respective taps. The voltage control apparatus is also provided with: a voltage measuring part, a current measuring part; a difference voltage calculation part for calculating difference voltage between voltage practically applied to the load which is found out on the basis of voltage and a current and voltage to be applied to the load in each of a plurality of distribution lines; a difference voltage determination part for judging whether a plurality of difference voltages are included in a previously determined difference voltage range or not; and a tap switching control part for controlling the tap switch so that the difference voltage concerned is included in the previously determined difference voltage range.

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