Evaluation of harmonic distortion from multiple renewable sources at a distribution substation
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Harmonic emission assessment in a distribution network with existing background voltage harmonics is a challenge for Renewable Power Producers (RPP) aiming to achieve grid code compliance. Dynamic interaction of harmonic sources at a Point of Common Coupling (PCC) renders the general summation law in IEC 61000-3-6 impractical, as harmonic phasors do not conform to the addition of rms values using alpha factors. The dynamic interaction of different PV plants and non-linear traction loads connected to the same 132 kV PCC is analyzed to validate the practical constraints in assessing grid code compliance requirements It is demonstrated that an innovative application of phasor aggregation, albeit scientifically challenged, could present a pragmatic approach for engineers tasked with network Power Quality performance
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The assessment of waveform distortion in power systems : validation of methods based on single–point measurements Serfontein, Duan (North-West University, 2011)The portion of energy converted by non-linear loads in the modern power system is increasing due to the energy-efficiency and sophistication possible with power electronics. Higher voltage and energy ratings are continuously ...
Serfontein, Duan; Rens, Johan (IEEE, 2011)This paper reports an evaluation of harmonic emission assessment. The results obtained by the Harmonic Vector Method are correlated to the behavior of harmonic active power by means of synchronized measurements in a ...
Peterson, B.B.; Rens, J.; Botha, M.G.; Desmet, J. (SAIEE, 2017)An improvement in the assessment of harmonic emissions as contributed by renewable generation such as a Photovoltaic (PV) plant, at a Point of Connection (PoC) to a distribution network, is needed. Both the generating ...