Power quality evaluation system and method

摘要

PPROBLEM TO BE SOLVED: To provide a power quality evaluating system which can evaluate the time-series transition of the deterioration of power quality and the degree of power quality, and besides can estimate the factor of power quality deterioration. PSOLUTION: A power quality computing means 13 computes a plurality of power quality values which show the degree of power quality from the quantity of electricity of consumers collected by a data collecting means 12 and preserves them in a power quality computed value preserving means 14. A power quality probability density function making means 15 makes the probability density function of each power quality value from each power quality value preserved in the power quality computed value preserving means 14. A power quality evaluating means 16 evaluates the degree of power quality, using the power quality probability density function of the power quality value made by the power quality probability density function making means 15 and the power quality judgement set value being preset for judging the degree of power quality. A power quality evaluation informing means 17 informs consumers of the evaluation of the degree of the power quality obtained by the power quality evaluating means 16. PCOPYRIGHT: (C)2006,JPO&NCIPI