Estimation of Harmonic Emission Levels with Harmonic Current Vector Method with Reference Impedances

T. Pfajfar, B. Blažič, and I. Papič (Slovenia)


Power quality, harmonic emission level, resonance conditions, reference impedances


This paper proposes a method for estimation of customer harmonic emission levels at the point of common coupling. The proposed method is based on the harmonic current vector method where reference impedances are introduced. The results of the proposed method are compared with the results of the method where customer harmonic emission levels are determined with switching manoeuvres of the customer distorting load. The proposed method can also evaluate the responsibility for harmonic distortion at the point of common coupling. The presented method allows calculation of harmonic emission levels without any switching manoeuvres or without knowing the actual customer impedances. It also enables the evaluation of customer and utility harmonic contributions in resonance conditions.

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