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

    Peterson, Brandon; Rens, Johan; Botha, Gerhard; Meyer, Jan; Desmet, Jan (IEEE, 2016)
    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 ...
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    Harmonic emission assessment on a distribution network: the opportunity for the prevailing angle in harmonic phasors 

    Peterson, Brandon; Rens, Johan; Desmet, Jan (IET, 2017)
    Harmonic emission assessment in high-voltage networks with a number of renewable power plants (RPP) interconnected is challenging. A sound scientific methodology readily accessible to engineers is needed to validate ...
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    Network resonance detection using harmonic active power 

    Bottenberg, Agknaton; Peterson, Brandon; Rens, Johan; Debruyne, Colin; Knockaert, Jos (IEEE, 2018)
    Resonances in electrical distribution systems can result in amplification of harmonics, which is undesirable in electrical networks. To avoid intrusive measurement techniques, in the majority of the cases network modeling ...
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    A discriminative approach to harmonic emission assessment 

    Peterson, Brandon; Rens, Johan; Botha, Gerhard; Desmet, Jan (IEEE, 2015)
    With the onset of renewable power sources onto the network, such as Photovoltaic power plants contributing to Total Harmonic Distortion (THD) in voltage, a methodology to quantify their contribution to the THD in voltage ...
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    Evaluation of harmonic distortion from multiple renewable sources at a distribution substation 

    Peterson, Brandon; Rens, Johan; Botha, Gerhard; Meyer, Jan; Desmet, Jan (IEEE, 2017)
    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 ...
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    On the remote calibration of voltage transformers: validation of opportunity 

    Rens, Sané; Rens, Johan; Holm, Johann; Botha, Gerhard; Desmet, Jan (IEEE, 2018)
    Remote calibration of instrument transformers seems possible if sufficient certainty in field measurements can be achieved. This opportunity, until now, was only investigated from a theoretical point of view and in this ...
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    Measurement uncertainty of current harmonics during the assessment of compliance to grid code requirements 

    Maraiz, Zander; Rens, Johan; Peterson, Brandon; Botha, Gerhard (IEEE, 2018)
    This paper improves the impact of measurement uncertainty on harmonic grid code compliance assessment by characterization of the current transformers at a renewable power producer. Field data was collected to evaluate the ...
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    Impact of aggregation interval on harmonic phase angle measurements 

    Peterson, Brandon; Rens, Johan; Botha, Gerhard; Blanco, Ana Maria; Meyer, Jan (IEEE, 2018)
    The aggregation principles of IEC 61000-4-30 is a well-known concept implemented in Power Quality (PQ) recorders. Only rms data is retained. Harmonic emission assessment requires the analysis of harmonic phasors. Continuous ...
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    Where is the power of the IEEE 1459-2010? 

    Rens, Johan; Van Rooyen, Tian; De Jager, Francois (IEEE, 2014)
    The integration of the IEEE 1459-2010 power definitions with the IEC 61000-4-30 PQ standard is investigated. A Class A PQ instrument, which record network coherent data with an absolute time uncertainty of less than 100 ...
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    Practical evaluation of voltage unbalance at a distribution transformer based on 50 Hz negative sequence active power 

    Seiphetlho, Tshepo; Rens, Johan (IEEE, 2011)
    The paper investigates the measurement and propagation of voltage unbalance at a distribution transformer. The relations between unbalance factors in voltage and current with the direction of negative sequence fundamental ...
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    Author
    Rens, Johan (30)
    Desmet, Jan (12)Botha, Gerhard (10)Peterson, Brandon (7)Bottenberg, Agknaton (4)Debruyne, Colin (4)Serfontein, Duan (4)De Kock, Jan (3)Meyer, Jan (3)Stander, Tiaan (3)... View MoreSubjectPower quality (4)Power system harmonics (4)Energy efficiency (3)Harmonic emission (3)Network harmonic impedances (3)Noninvasive (3)Online measurements (3)PQ (3)Synchronous machines (3)Grid code compliance (2)... View MoreDate Issued2017 (7)2016 (5)2018 (5)2015 (4)2009 (3)2011 (3)2014 (3)Has File(s)No (26)Yes (4)

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