Patent ID: 7622826
Filing Date: 2009-11-24
Classification: H02J

Abstract:
1. A flicker improvement effect evaluating system for evaluating an effect of improving voltage flicker attained by a compensator introduced to a power system having a load connected to a prescribed bus, comprising: a system voltage detecting unit detecting a system voltage; a load current detecting unit detecting a load current flowing to said load through said prescribed bus; a compensation current operating unit operating a compensation current output by said compensator, based on detected said system voltage and said load current, a system impedance operating unit operating system impedance of said power system based on detected said system voltage and said load current; a not-yet-improved system voltage operating unit simulating a not-yet-improved system voltage at present, from said operated system impedance and detected said system voltage and said load current; an improved system voltage operating unit simulating an improved system voltage from operated said compensation current and said system impedance and from detected said system voltage, a voltage flicker detecting unit detecting voltage flicker of each of said operated not-yet-improved system voltage and said improved system voltage; and an improvement rate operating unit operating rate of improvement attained by said compensator, from said detected respective voltage flickers.