A fault analysis of DC electric arc furnaces with SVC harmonic filters in a mini-mill plant

Park, Byung-Ju; Lee, Hansang; Jang, Gilsoo; Han, Byung-Moon

doi:10.1016/j.epsr.2009.12.005

Cited by 7 publications

(5 citation statements)

References 11 publications

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“… Both sintering devices, induction furnaces and arc furnaces are heavy harmonic sources. The harmonic examination of the arc furnaces has already been done in literature well-known [10], [12], [13], [18]- [21], [23], [28]. The harmonics of an electric current assisted sintering system is to be examined in the near future by the present authors.…”

Section: The Harmful Attacksmentioning

confidence: 97%

“…Electric arc furnaces (EAF) are systems used for heating materials with electric arc. Arc furnaces which are also high power metallurgical devices like resistive sintering systems are commonly used in industrial settings to heat and mold metal and their power system harmonics and power requirements have been examined in literature [10], [12], [13], [18]- [21], [23], [28]. Arc furnaces range in size from only a few dozen grams (used in research laboratories for some specific purposes) to about hundreds ton units (used for high volume industrial applications).…”

Section: Introductionmentioning

confidence: 99%

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Malzeme Üretiminde Siber Güvenlik

Yener¹,

Yener²,

Mutlu³

2020

El-Cezeri Fen Ve Mühendislik Dergisi

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Industry 4.0, a new industry revolution, is happening now and several developed countries are leading the path. Internet of things (IoT) is also encompassed by Industry 4.0. In the future, more devices in factories are to be connected to Ethernet or Internet. However, this makes the companies, devices and researchers vulnerable to cyber-attacks. Recently, some cyber-attacks which have happened to some companies or countries verify the danger. Sintering systems and furnaces are used for research by universities and for series manufacturing by factories. Arc furnaces and induction furnaces are also commonly used devices in metal factories. A sintering system, an arc furnace or an induction furnace which is connected to Internet or Ethernet may also be under cyber-attack threat. The danger may be prevented by taking necessary precautions. In this study, these threeproduction systems are first briefly introduced and then inspected assuming that they have been connected to internet and examined with considering cyber-attack point of view. Some basic solutions against cyber-attacks to the aforementioned devices are suggested.

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Section: The Harmful Attacksmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Malzeme Üretiminde Siber Güvenlik

Yener¹,

Yener²,

Mutlu³

2020

El-Cezeri Fen Ve Mühendislik Dergisi

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“…The scientific community has most of the time adopted the PDCS output current waveforms as; -constant(DC), -AC, -pulsed DC and -pulsed DC+DC considering their polarity and shapes [4,5]. Arc furnaces which are also high power metallurgical devices like PDCS systems are commonly used in industrial settings to heat and melt metals and their power system harmonics and power requirements have been examined in literature [12][13][14][15][16][17][18][19][20][21]. However, to the best of our knowledge, utility side or power system side input harmonics and powers of a PDCS system have not been examined in literature previously.…”

Section: Introductionmentioning

confidence: 99%

Power system harmonic analysis of a pulse DC sintering system

Yener

Mutlu

2020

Eng. Res. Express

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Pulse DC Sintering System (PDCS) produces metallic and nonmetallic samples in a cheap and efficient way in a short time. Some PDCS systems possess thyristor-based rectifiers to control their output power. This results in PDCS systems creating power system harmonics. The harmonic content of an PDCS system varies during sample manufacturing process since the PDCS container resistance is temperature dependent. In this study, power system harmonics of a PDCS system is examined for the first time in literature. A power analyzer device is used to measure and record the supply side current, voltage and power of the PDCS system as a function of time. Besides, an infrared temperature meter module is a used to measure PDCS container temperature and record it with respect to time during sample production. Total harmonic distortion is found to be decreasing with container temperature increasing.

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“…Based on the sudden reduction of current harmonics in the fault conditions, Dehghan Marvasti et al 11 used the primary side data of EAF transformer to detect fault in the secondary side. To overcome the failure of the second harmonic filter in the static VAR compensator, Park et al 12 first concluded the reasons via various measurements. Then three solutions to suppress the transformer inrush current and another three solutions to avoid the parallel resonance were suggested.…”

Section: Introductionmentioning

confidence: 99%

Detecting Outliers in Electric Arc Furnace under the Condition of Unlabeled, Imbalanced, Non-stationary and Noisy Data

Wang

Mao

2018

Measurement and Control

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The presence of outliers is the main reason leading to ineffectiveness of advanced data-driven control methods in electric arc furnace systems. This paper proposes a hybrid method dedicated to detecting outliers in electric arc furnace systems, where process data are characterized as unlabeled, imbalanced, non-stationary and noisy. First, the raw data are divided into certain number of clusters. Then, with each cluster, a one-class classifier can be trained. So with these well-trained sub-models, new test points can be investigated. Those points that are rejected by all sub-models will be labeled as outliers. With the combination of one-class classification and clustering technique, the intricate data in electric arc furnace can be processed effectively. In addition, the detector will be updated with a specific strategy to enhance its adaptiveness. A series of experiments are carried out, and comparative results have shown the effectiveness of our method.

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A fault analysis of DC electric arc furnaces with SVC harmonic filters in a mini-mill plant

Cited by 7 publications

References 11 publications

Malzeme Üretiminde Siber Güvenlik

Malzeme Üretiminde Siber Güvenlik

Power system harmonic analysis of a pulse DC sintering system

Detecting Outliers in Electric Arc Furnace under the Condition of Unlabeled, Imbalanced, Non-stationary and Noisy Data

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