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    DC power quality emulator 

    Jansen van Vuuren, Riekert; Botha, Gerhard (IEEE, 2020)
    Currently, no dc power quality standards exist. The lack of dc power quality (PQ) standards can be addressed by, amongst others, evaluating the impact of PQ deviations on consumer end equipment. A voltage disturbance ...
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    A proposed method for evaluating the frequency response of 22 kV outdoor current transformers for harmonic measurements in renewable energy plant applications 

    Murray, Ruan; De Kock, Jan A. (IEEE, 2019)
    With an increase in renewable energy plants connected to the national grid of South Africa the monitoring and assessment of power quality is becoming more important for utilities and independent power producers (IPPs). For ...
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    The validation of single point measurements for the localization of multiple harmonic sources 

    Serfontein, D.; Rens, A.P.J. (IEEE, 2010)
    Power quality management requires inexpensive and simple methods for electric power quality monitoring. This paper investigates the validity of single point measurements for the localization of sources of waveform distortion ...
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    Attenuation effect with non-linear loads for small stand-alone grids 

    Bottenberg, Agknaton; Rens, Johan; Van Ryckeghem, Jurgen; Debruyne, Colin; Knockaert, Jos (IEEE, 2016)
    This paper presents the effect of non-linear loads on the overall voltage quality in small powered stand-alone (islanded) systems. The iterative effect between current and voltage distortion is related to the source's ...
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    The effect of real network phase disturbances on the calculation of IEC 61000-4-30 parameters 

    Rens, Johan; De Kock, Jan; Van Wyk, Willie; Van Zyl, Jacobus (IEEE, 2014)
    Real life network dynamic phenomena are used to demonstrate how the calculation of IEC 61000-4-30 parameters can be affected. The voltage frequency can change instantaneously at a point in the network due to a shift in the ...
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    The effect of a reduced power quality on the energy efficiency of stand-alone generator systems 

    Debruyne, Colin; Rens, Johan; De Kock, Jan; Desmet, Jan (IEEE, 2016)
    It has already been thoroughly validated that the efficiency of direct online motors is susceptible towards certain power quality parameters such as voltage unbalance or harmonic voltage distortion. It can be assumed that ...
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    Evaluation of system losses due to harmonics in medium voltage distribution networks 

    Lombard, C. (Jnr); Rens, A.P.J.; Lombard, C. (Snr) (IEEE, 2016)
    Power system harmonics are a known cause to failure, disoperation or premature aging of customer's equipment. It also causes additional losses in a distribution network that influence the planning and design of future ...
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    Modeling and validation of losses due to unbalanced loading of stand-alone generators 

    Debruyne, Colin; Rens, Johan; Sergeant, Peter; Desmet, Jan (IEEE, 2017)
    The goal of this paper is to evaluate the possibility of deriving a simple lumped electrical model of the additional losses in stand-alone synchronous generators due to unbalanced loading. An in depth analysis will reveal ...

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    AuthorRens, Johan (4)Debruyne, Colin (3)De Kock, Jan (2)Desmet, Jan (2)Rens, A.P.J. (2)Botha, Gerhard (1)Bottenberg, Agknaton (1)De Kock, Jan A. (1)Jansen van Vuuren, Riekert (1)Knockaert, Jos (1)... View MoreSubject
    Power quality (8)
    Energy efficiency (4)Power system harmonics (3)Synchronous machines (3)Harmonic distortion (2)10/12 Cycle block (1)AC (1)Asynchronous sampling (1)Class A (1)Current harmonics (1)... View MoreDate Issued2016 (3)2010 (1)2014 (1)2017 (1)2019 (1)2020 (1)Has File(s)
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