Browsing by Subject "Power quality"

Now showing items 1-10 of 14

    • 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 ...

    • A benchmarking model for harmonic distortion in a power system 

      Rudolph, Johnny (2011)
      The present power system is loaded with sophisticated energy conversion technologies like solid state converters. With the rapid advance in semiconductor technology, power electronics have provided new devices that are ...

    • Comparative study in clearing of transient faults in medium voltage networks by means of neutral or single-phase tripping 

      Van der Mescht, Christo Johannes (North-West University (South Africa) , Potchefstroom Campus, 2016)
      Within power utility networks, transient and permanent faults cause power interruptions to customers. Research has indicated that most faults that result in breakers tripping within MV networks are temporary in nature. ...

    • 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 ...

    • Dynamic modelling of an industrial microgrid 

      Erasmus, Rudolf Johan (North-West University (South Africa)., 2019)
      With a decentralized approach to power system development gaining traction in both developed and under-developed countries, the realization of the next generation of power distribution network is identified as the Smart ...

    • Dynamic modelling of an industrial microgrid 

      Erasmus, R.J. (North-West University (South Africa), 2019)
      With a decentralized approach to power system development gaining traction in both developed and under-developed countries, the realization of the next generation of power distribution network is identified as the Smart ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Impact of voltage waveform quality on distribution network planning 

      Lombard, C. (North-West University, 2018)
      The present study investigated the power losses in a specific portion of the MV distribution network in Potchefstroom, South Africa. This was done in an attempt to assess and predict the impact of harmonic distortion on ...