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|Type:||Artigo de periódico|
|Title:||PRACTICAL APPROACHES FOR AC SYSTEM HARMONIC IMPEDANCE MEASUREMENTS|
|Abstract:||This paper is concerned with AC supply system harmonic impedance measurements. On the basis of a given and known switchable shunt impedance and/or non-linear load and site measurements, three methods are presented. The first approach is quite straightfoward. It assumes a no-load distorted busbar and uses basic circuit theory to calculate the required harmonic impedance. The second method disregards any previous busbar distortion and the harmonic impedance is evaluated by injecting harmonic currents at the point of measurement. The third approach also relies on harmonic injection but it takes into account any busbar distortion prior to the non-linear load connection. Using a laboratory model and by comparing harmonic impedance results it is shown that both no-load busbar distortions and the correct measurement of harmonic phase angles may strongly affect the accuracy of calculations.|
|Editor:||Ieee-inst Electrical Electronics Engineers Inc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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