Browsing by Author "Milardovich, Diego"

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    On the reduction of the third-order harmonic losses in low–voltage power cables used for feeding large LED and CFL lighting loads.
    (2017) Milardovich, Natalio; Prevosto, Leandro; Lara, Miguel Ángel; Milardovich, Diego
    An experimental investigation of diversity factors for LED (light emitting diode) in combination with CFL (compact fluorescent lamps) and LED lamps is presented in this paper. Attention was paid to the reduction of low–order harmonic currents, especially the third one; which is mainly responsible for the strong increase in power losses in the neutral conductor of low–voltage installations. The harmonic currents drawn by several LED and CFL lamps with nominal powers < 25 W were first measured to investigate the electrical characteristics of individual lamps. The results showed a sensible reduction of the harmonic current of third order and therefore a marked reduction of the power losses associated with them. The convenience of having LED lamps designed to operate as two–phase loads is suggested for certain applications of significant power demand.
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    The Impact of the Use of Large Non-Linear Lighting Loads in Low-Voltage Networks.
    (IntechOpen., 2018) Milardovich, Natalio; Prevosto, Leandro; Lara, Miguel; Milardovich, Diego
    The principal numerical and experimental results obtained by the authors on the har monic power losses in low-voltage networks in the lighting area have been summarized in this review. Light-emitting diodes (LEDs) and compact fluorescent lamp (CFL) loads were considered. Four-core cables and four single-core cable arrangements were exam ined. The cables were modeled by using electromagnetic finite element analysis software. It was found that the cross section of the neutral conductor plays an important role in the derating of the cable ampacity due to the presence of a high level of triplen harmonics in the distorted current. In order to reduce the third-order harmonic currents in the neutral conductor, an experimental investigation of diversity factors for LED in combination with CFL and LED lamps was also performed. Attention was paid to the reduction of the third order harmonic current, which is mainly responsible for the strong increase in power losses in the neutral conductor of low-voltage installations. The convenience of having LED lamps designed to operate as two-phase loads is suggested for certain applications.