Distribution system voltage regulator, voltage regulation method, and voltage regulation system

摘要

PROBLEM TO BE SOLVED: To provide a voltage regulation device, voltage regulation method, and voltage regulation system for a power distribution system, which eliminate output suppression that lowers voltage at a photovoltaic power generation device installation point.SOLUTION: A voltage regulation device for a power distribution system comprises: a plurality of photovoltaic power generation devices having an output suppression function; and a transformer 300 with taps for adjusting voltage at a virtual point of the power distribution system to set voltage. The voltage regulation device comprises: photovoltaic power generation device output amount calculation means for calculating output amounts with respect to the plurality of photovoltaic power generation devices; clustering means for performing clustering analysis on the output amounts by using past measurement values correlating with output suppression to extract a photovoltaic power generation device having correlation with respect to the output suppression; analysis means for defining the centroid position of the power distribution system as a virtual point using multiple regression analysis on passing current through the transformer with taps so that a distance from the transformer with taps to the virtual point take as a setting value; line drop compensation circuits LDC 1, LDC 2 for estimating voltage at the virtual point using the setting value; and a tap controller 340 for controlling the voltage at the virtual point to the set voltage.SELECTED DRAWING: Figure 3