Abstract
Most general-purpose analyzers for harmonic analysis on distribution lines are designed to sample the data of one or two power supply periods. In other words, these analyzers process waveforms and display the results based on the assumption that the analyzed waveforms do not contain non-integral components, such as subharmonics and interharmonics. When waveforms containing non-integral components are analyzed with these general-purpose analyzers, the results often indicate as if hardly existing components were contained.
This paper proposes a technique of waveform judgment and explains its application method. The technique enables the judgment of non-integral components in analyzed waveforms through the use of a type of Lissajou's figure and clarifies the component types and also the time window necessary for appropriate analysis.
