Influence of Third Harmonic Circulating Currents in Selecting Neutral Grounding Devices

It has long been recognized that third harmonic currents can and often do appear in the neutral of industrial generators. This paper will review the causes of such currents and the effects these currents have in the power system. The common methods of neutral grounding will be discussed with regard to circulating harmonic currents.

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[2]  David Ginsberg,et al.  Voltage harmonics of salient-pole generators under balanced 3-phase loads - II , 1960, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.