Practical approaches for AC system harmonic impedance measurements

Author

de Oliveira, A. ; de Oliveira, J.C. ; Resende, J.W. ; Miskulin, M.S.

Author_Institution

Fed. Univ. of Uberlandia, Brazil

Volume

6

Issue

4

fYear

1991

fDate

10/1/1991 12:00:00 AM

Firstpage

1721

Lastpage

1726

Abstract

AC supply system harmonic impedance measurements are discussed. On the basis of a given and known switchable shunt impedance and/or nonlinear load and site measurements, three methods are presented. The first approach 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 injection but it takes into account any busbar distortion prior to the nonlinear 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 calculation

Keywords

electric impedance measurement; harmonics; power transmission; AC system harmonic impedance measurements; no-load distorted busbar; nonlinear load; switchable shunt impedance; Capacitors; Circuit theory; Current measurement; Distortion measurement; Harmonic distortion; Impedance measurement; Laboratories; Power harmonic filters; Switches; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.97712

Filename

97712