Harmonic elimination of electric arc furnaces by active power filters and their stability analysis

Ghoudjehbaklou, H.; Kargar, Abbas

doi:10.1108/03321640210410760

Cited by 5 publications

(9 citation statements)

References 7 publications

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“…The average harmonic content for these waveforms has been presented in Table I. The calculated THD coefficients as well as harmonic content, describing waveform distortions and presented in Table I, are consistent with results reported by other researchers [13], [14]. Exemplary arc current and arc voltage waveforms, acquired during the melting stage of the EAF work cycle, have been presented in Fig.…”

Section: Analysis Of Eaf Current and Voltage Signalssupporting

confidence: 86%

Electric Arc Furnace Power Quality Analysis Based on a Stochastic Arc Model

Grabowski

Walczak

Klimas

2018

2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Syst

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Electric arc furnaces (EAF) are commonly used in steel industry. Unfortunately, nonlinear characteristic of the arc furnace and its stochastic behavior bring about many problems, e.g. voltage flicker and waveform distortions. The AC furnaces are usually modelled using combined models which divide the phenomenon taking place in real objects into a deterministic and a stochastic or chaotic parts. The former can be expressed by a nonlinear differential equations. The paper goal was to take advantage of the earlier results, i.e. a closed form of the solution to one of the most popular nonlinear differential equations used for the AC electric arc modelling, and start research towards a complete EAC model which covers not only the deterministic but also the time-varying nature of the arc waveforms. Such a model can be helpful, among others, in solution to power quality problems in EAF supplying networks. Theoretical considerations have been illustrated by some examples and the results have been compared with measurements.

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Section: Analysis Of Eaf Current and Voltage Signalssupporting

confidence: 86%

Electric Arc Furnace Power Quality Analysis Based on a Stochastic Arc Model

Grabowski

Walczak

Klimas

2018

2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Syst

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“…The arc current harmonic characteristic can be found in many publications (Brociek and Wilanowicz, 2011;Chang et al, 2008;Ghoudjehbaklou and Kargar, 2002;Salor et al, 2010). The arc current waveform i(t) (Fig.…”

Section: Examplementioning

confidence: 99%

Deterministic model of electric arc furnace – a closed form solution

Grabowski

Walczak

2013

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose -Electric arc furnaces are usually modelled using combined models which divide the phenomenon taking place in real objects into a deterministic and a stochastic or chaotic parts. The former is expressed by a nonlinear differential equations. The paper goal was to obtain a closed form of the solution to one of the most popular nonlinear differential equations used for the AC electric arc modelling. Design/methodology/approach -The solution has been obtained in the time domain by a sequence of transformations of the original nonlinear equation which lead to a linear equation, for which a closed form solution is known. Findings -A set of parameters for which the solution to the nonlinear differential equation describing electric arc can be obtained in a closed form. Research limitations/implications -There are still some parameter values for which the solution can be found only numerically. Moreover, due to the nature of the phenomena occurring in electric arc furnaces in order to build a complete model of the arc the deterministic model must be extended using for example stochastic approach. Practical implications -The obtained results enable determination of exact waveforms of the arc voltage or radius without application of numerical algorithms for ODE solving. The arc model can be used to evaluate the impact of arc furnaces on power quality during the planning stage of new plants. The proposed approach facilitates calculation of the arc characteristic. Originality/value -The importance of having a closed form of the solution instead of the numerical ones comes from new possible ways of extension of the arc model in order to cover the time-varying nature of the arc waveforms. So far the equation has been solved only using numerical algorithms.

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“…Rl=10 Q Ll=lOmH Cl=tOpF (6) Fig. 4(a) also shows the load voltage (Vout), corresponding loads current (lout) and error between these reference and load voltages consequently.…”

Section: Simulation Resultsmentioning

confidence: 97%

“…Due to high conformity of the converter control strategy (finding the best state of the converter switches in each time) with an optimization problem, this control method is proposed and developed. Details of the procedure are presented in [5,6]. According to the converter model, that is shown in Fig.…”

Section: Controller Descriptionmentioning

confidence: 99%

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Configuration and Control of a Harmonic Voltage / Current Source

Kargar

2005 IEEE International Conference on Industrial Technology

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Ahstrac/-A harmonic generator that can produce any favored voltage or current waveforms is presented and discussed in this paper. With designed confilguration, dynamic programming controller, and load estimator section, is indicated that this system is suitable for evaluating effects of desired harmonics on different loads such as protection relays and metering devices. The load estimator is added to minimize the effects of load variations on the output waveforms. Simulation results in six different cases illustrate the capability of the generator.

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Harmonic elimination of electric arc furnaces by active power filters and their stability analysis

Cited by 5 publications

References 7 publications

Electric Arc Furnace Power Quality Analysis Based on a Stochastic Arc Model

Electric Arc Furnace Power Quality Analysis Based on a Stochastic Arc Model

Deterministic model of electric arc furnace – a closed form solution

Configuration and Control of a Harmonic Voltage / Current Source

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