DEVICE AND METHOD FOR SUPPORTING DISCRIMINATION AGAINST CAUSE OF SYSTEM VOLTAGE RISE

摘要

PROBLEM TO BE SOLVED: To simply specify whether or not the cause of system voltage rise depends on output increase in distributed power supply facilities of a user.SOLUTION: Survey power is injected between a distribution transformer 11 and a connection point of distributed power supply facilities 16 by a power implantation device 21, and in that state, based on a difference voltage ΔE between a secondary-side voltage Es of the distribution transformer 11 and a voltage Er at the connection point of the power implantation device 21 and survey power ΔP, ΔQ injected by the power implantation device 21, line constant calculating means 28 calculates the line constant between the distribution transformer 11 and the connection point of the power implantation device 21.SELECTED DRAWING: Figure 1