TIME DOMAIN MEASURING METHOD OF HARMONIC COMPONENTS IN DISTORTION WAVE TO ANALYZE POWER QUALITY

摘要

PURPOSE: A time domain measuring method of harmonic components in a distortion wave to analyze a power quality are provided to extract a harmonic component of a distorted wave more precisely by reducing calculation of a processor to secure storage capacity. CONSTITUTION: A voltage and current waveform to be measured and analyzed are measured. A sine wave of which maximum size in a harmonic extraction order is 1 is generated and inputted as input data of RMP(Reduced Multivariate Polynomial) model. A distorted wave of the outputted current and voltage is estimated through a weighted value. The distorted wave of the estimated voltage and current is compared with the input waveform. A harmonic extraction at orders is detected by using a relation equation.