Harmonics, interharmonics and unbalances of arc furnaces: a new frequency domain approach

Beites, L.F.; Mayordomo, J.G.; Hernàndez, A.; Asensi, R.

doi:10.1109/61.956754

Cited by 62 publications

(19 citation statements)

References 9 publications

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“…The aforementioned current matches the arc furnace current during the melting process as it contains all kinds of harmonics as indicated by Douglas et al (1996), and Beites et al (2001). This current is depicted in Figure 4, where it contains characteristic harmonics, non-characteristic harmonics, inter-harmonics and sub-harmonics.…”

Section: Ability Of the Proposed Technique To Track Different Frequenmentioning

confidence: 83%

“…Mitigating the current fluctuation is difficult because this fluctuation encompasses characteristic harmonics, non-characteristic harmonics including even and odd regular orders whose frequencies are too difficult to track as indicated by Douglas et al (1996). Also, other research work reveals that the current fluctuation of arc furnaces has inter-harmonics and sub-harmonics as proved through the work done by Douglas et al (1996), Tayjasanant et al (2005), and Beites et al (2001), and these kinds of harmonics are too difficult to be extracted because it is difficult to track their frequencies.…”

Section: Introductionmentioning

confidence: 95%

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An efficient current regulator for a power conditioner operated by an innovative strategy

Elnady¹,

Liu

2012

IJPELEC

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This paper presents an innovative implementation of the recursive Gauss-Newton (GN) algorithm for extraction of the common current quality problems such as the current harmonics and current fluctuation. This paper introduces also the utilisation of the adaptive notch filters to efficiently track the unknown frequencies of the current disturbances. The paper exhibits the mitigation results for these current disturbances using a shunt power conditioner. Furthermore, the adopted shunt power conditioner is operated by the ramp-comparison current regulator. Also, the paper proves that the utilisation of the ramp-comparison current controller, (the linear current controller), is more meritorious than the commonly used current controller, which is the hysteresis current controller, (HCC). The effectiveness of the developed extraction technique with the employed current controller is verified by the simulation and experimental results.

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Section: Ability Of the Proposed Technique To Track Different Frequenmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 95%

An efficient current regulator for a power conditioner operated by an innovative strategy

Elnady¹,

Liu

2012

IJPELEC

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“…So far, in this regard, different models for the electric arc have been suggested [1][2][3][4][5][6]. One of these models is based on a nonlinear equivalent circuit in time domain [1,2] analysis, which is based on linearising the voltage-current characteristic of the electric arc.…”

Section: Introductionmentioning

confidence: 99%

“…The harmonic voltage source method in [3] is based on the harmonic study of a certain kind of arc voltage waveform. Another group of models is described by the frequency domain solution of nonlinear differential equations that is often used for harmonic analysis of the system [4,5]. Some of the other models are based on stochastic characteristics of the EAF, which are mainly suitable for flicker analysis of the arc voltage [6].…”

Section: Introductionmentioning

confidence: 99%

Adaptive filter design based on the LMS algorithm for delay elimination in TCR/FC compensators

Hooshmand

Esfahani

2011

ISA Transactions

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“…Another group of models is based on the frequency domain that is often used for harmonic analysis of the system [7]- [9]. The frequency-domain solution of nonlinear differential equations depends on the system topology and operating condition.…”

mentioning

confidence: 99%

A New Stochastic Model of Electric Arc Furnace Based on Hidden Markov Model: A Study of Its Effects on the Power System

Esfahani

Vahidi

2012

IEEE Trans. Power Delivery

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Electric arc furnaces (EAFs) are nonlinear and timevariant loads that cause severe fluctuations of current, voltage, and current harmonics, voltage flicker, frequency changes, etc. The requirement is to present an accurate model to analyze the function of these types of loads. In this paper, a new model based on hidden Markov model theory is presented for an electric arc. For this purpose, the characteristic of the arc voltage-current is divided into four regions. Then, on the basis of actual measured samples of an electric arc in several functioning cycles of EAF, different operating points are generated in the form of statistical probability, corresponding to hidden Markov theory in the aforementioned four regions. The arc model is designed in the form of a current-dependent voltage source. Therefore, the proposed model is without linear approximation and corresponds to the actual state. Also, in order to be accurate in flicker modeling, a voltage is randomly considered for the arc model. After designing the aforementioned model, the effects resulting from this electric load in the power system are studied and analyzed. The simulation results are compared with the measured arc to show the accuracy and soundness of the model. Index Terms-Electric arc furnace (EAF), flicker, hidden Markov model (HMM), power quality (PQ).

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Harmonics, interharmonics and unbalances of arc furnaces: a new frequency domain approach

Cited by 62 publications

References 9 publications

An efficient current regulator for a power conditioner operated by an innovative strategy

An efficient current regulator for a power conditioner operated by an innovative strategy

Adaptive filter design based on the LMS algorithm for delay elimination in TCR/FC compensators

A New Stochastic Model of Electric Arc Furnace Based on Hidden Markov Model: A Study of Its Effects on the Power System

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