The education of EMC at the UWB

Kus, Vaclav; Drabek, Pavel

doi:10.1109/epqu.2011.6128811

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…The most frequent power quality (PQ) problems are [1,2,3]: i) Transient overvoltages and currents that are occurring in power networks as the result of direct strokes to the power or communications systems, load or capacitor switching in the power grids, unintentional events such as power system faults and their elimination, or interaction between different systems, such as power and communications, etc.…”

Section: Introductionmentioning

confidence: 99%

Integrated didactic software package for computer based analysis of power quality

Rusinaru

Popescu

Manescu

et al. 2012

2012 International Conference on Applied and Theoretical Electricity (ICATE)

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The actual state and operation of the Romanian power system ask for a certain expertise in detecting the causes of electromagnetic perturbations and their evaluation in power grids. Consequently, all the aspects regarding the power quality issues became a common characteristic of the power systems' curricula within Romanian power engineering faculties. The students attending these classes are involved in computer-based laboratory works. This paper describes the authors' contribution regarding the development of an integrated software package for power quality analysis at the Faculty of Electrical Engineering, University of Craiova. This software structure is built on a link between professional specialized software packages and software subroutines conceived by the authors. The parameters related to voltage/current harmonics can be analyzed using MATLAB subroutines and EDSA package -Electrical Power System Design Software. The results can be visualized as different types of reports. They can be further exported to EDSA program or/and MATLAB subroutine in order to size the harmonic filters and evaluate their effect on power quality in the analyzed power grids. EDSA programs package, as well as the subroutines developed in MATLAB environment are traditional tools used by the students attending the Power Quality classes within the Faculty of Electrical Engineering.

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Section: Introductionmentioning

confidence: 99%

Integrated didactic software package for computer based analysis of power quality

Rusinaru

Popescu

Manescu

et al. 2012

2012 International Conference on Applied and Theoretical Electricity (ICATE)

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“…In principle, it is a rectifier working to capacitive load; the values of harmonic currents are very high. In a simplified calculation, there can be used a so-called "generalized amplitude principle" (1)…”

Section: Introductionmentioning

confidence: 99%

“…Equation (1) advantage is that it also applies to conventional controlled rectifiers, to calculation of the harmonic ones with intermittent currents, to calculation of harmonic voltage converters as well as to frequency converters or other rectifiers working to capacitive loads. See the calculated shape of current in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Harmonic Currents of Semiconductor Pulse Switching Converters

Bilík¹,

Žídek²,

Kus³

et al. 2013

EPE

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Due to the operation of power semiconductor switching converters, the content of harmonic currents, which these switching converters take from the feed array, is still increasing. One of the possible ways of minimizing these currents is the use of pulse switching converters. On one hand, the original, characteristic harmonic ones are minimized, but, on the other hand, new frequencies caused by the modulation frequency appear in the current spectrum. The level of the currents of these frequencies is small and is scarcely dependent on the load of the converter. It may happen that the proportional value of the monitored harmonic one is high, although the absolute value is low. In the article presented, there is a description of the activity of the pulse voltage rectifier and an analysis of the current taken. The other part contains the results of the harmonic analysis of the stated current, including both the absolute and proportional values according to the load. In the conclusion, there are results of measurements of pulsed switching converters taken from the real measurement.

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