On the assessment of harmonic emission in distribution networks: opportunity for the prevailing harmonic phase angle

Abstract

Harmonic emission assessment for Grid Code compliance of Renewable Power Plants (RPP) has to be fair and pragmatic. The CIGRE C4.109 method lacks the ability to determine which harmonic currents have a positive or negative impact on emission in the network. The aggregation of harmonic phasors can support the better understanding of emission based on analysis of the prevailing angle in the harmonic current phasor. This opportunity is evaluated by the application of harmonic emission assessment at a grid-connected 11 kV Photovoltaic plant