VOLTAGE UNBALANCE SUPPRESSION SUPPORT METHOD, AND VOLTAGE UNBALANCE SUPPRESSION SUPPORT DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a voltage unbalance suppression support method and a voltage unbalance suppression support device ensuring a load distribution capable of suppressing voltage unbalance of a three-phase distribution system, by making the connection phase combination of single-phase loads imbalance intentionally to lower voltage unbalance, in a direction for cancelling voltage unbalance occurring by the asymmetry of phase sequence, with a small amount of calculations.SOLUTION: In a voltage unbalance suppression support method for determining the connection phase of a plurality of single-phase loads where one of three combinations, each consisting of any two phases out of three phases of a three-phase distribution line to which power is supplied from the upstream side, is connected as a connection phase, the three-phase distribution line is divided into a plurality of predetermined sections where at least the phase sequence is identical, and the connection phase of each single-phase load is determined so that the total capacity of one connection phases where the line-to-line voltage, dependent on the phase sequence of the three-phase distribution line, is minimum out of the three connection phases is smaller than each total capacity of other two connection phases, for each predetermined section.SELECTED DRAWING: Figure 14