A novel feeding topology for DC electric arc furnaces utilizing PWM-AC choppers

Kolagar, Arash Dehestani; Shoulaie, Abbas

doi:10.1002/etep.1709

Cited by 3 publications

(14 citation statements)

References 23 publications

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“…The recommended supplying topology is simulated in PSCAD/EMTDC software. The significant technical specifications of the steel making plant are described in Appendix A. Additionally, it should be noted that the chaotic model of the DC arc furnace as presented in Kolagar and Shoulaie and Kolagaret al has been employed in this paper. Moreover, the switching frequency of matrix converter has been taken into account equal to 600 Hz, and also the frequency of input and output side of the matrix converter has been selected equal to 50 Hz.…”

Section: Simulating An Industrial Steel Making Plant With DC Arc Furnacementioning

confidence: 95%

“…Similar to what was presented in Kolagar and Shoulaie, to obtain an optimal operating point, a cost function found on favorable power quality criteria is taken into account, and then the IPF characteristics and input current displacement angle are determined through optimizing it. As mentioned in Kolagar and Shoulaie, the selection of the IPF characteristics is relied on choosing an optimum cutoff frequency.…”

Section: Description Of the Proposed Feeding Systemmentioning

confidence: 99%

“…For instance, in thyristor‐based feeding system, besides the commutation voltage drop, line voltage notching, and input current distortion, because of the phase control method on the AC/DC converters, the arc voltage variations impose large reactive power fluctuations on the power grid, and consequently the input power factor is significantly reduced. Furthermore, in DC chopper‐based power supply, several current control loops are required to equally share the arc current between parallel DC chopper units and also the large quantity of interphase reactors connected in chopper unit outputs raises the total cost of the feeding topology and alleviates the efficiency . To overcome the aforementioned shortcomings and also to enhance the performance, a novel supplying configuration based on matrix converter for DC electric arc furnaces is recommended in this paper.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, a three‐phase to three‐phase matrix converter is employed, and also an IPF unit is applied at the input side of the matrix converter. Note that analytical design procedure of IPF unit is also explained in Kolagar and Shoulaie . To establish a compromise between input line current THD and input power factor values, a cost function is taken into account, and the IPF characteristics are obtained through optimizing the relevant cost function.…”

Section: Introductionmentioning

confidence: 99%

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A new matrix converter‐based feeding system for DC electric arc furnaces and a comprehensive comparison between different types of feeding topologies

Kolagar

Arjanaki

Pahlavani

2019

Int Trans Electr Energ Syst

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Summary This paper presents a novel feeding system based on matrix converter power supply for DC electric arc furnaces. This recommended topology possesses many promising features like overcoming the disadvantages of conventional DC power supply systems, improving the efficiency of feeding system, and power quality indices improvement in the grid side. It comprises a matrix converter controlled by space vector modulation (SVM) strategy with a single‐sided switching pattern and a six‐pulse diode rectifier. The primary function of this topology is to regulate the rms value of fixed input voltage of AC source to the proper value utilizing matrix converter, and then a six‐pulse diode rectifier can be applied to provide the required DC voltage for supplying DC arc furnace. The selection of matrix converter has been made because of particular advantages such as controllable input power factor, mitigation of input current harmonics, and controllable output frequency. The suggested configuration predominates because of the lower number of rectifier units and smoothing reactors. Moreover, the suggested feeding system does not have any current or power‐sharing problems, and only one proportional‐integral (PI) controller is adequate to control the DC arc current or its power. Note that the matrix converter used in this topology is three‐phase to three‐phase and utilized an improved passive filter (IPF) at the input side.

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Section: Simulating An Industrial Steel Making Plant With DC Arc Furnacementioning

confidence: 95%

Section: Description Of the Proposed Feeding Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new matrix converter‐based feeding system for DC electric arc furnaces and a comprehensive comparison between different types of feeding topologies

Kolagar

Arjanaki

Pahlavani

2019

Int Trans Electr Energ Syst

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“…There are lots of studies on different aspects of AC EAFs [1][2][3] and some others exclusively on DC EAFs. [4,5] On the other hand, increasing competition in the global transformer market has encouraged the manufacturers to increase reliability while reducing cost. [6] Therefore, using various methods to solve transformer design optimization, presenting a detailed treatment of transformer selection and considering the environmental cost of the transformer are mandatory [6].…”

Section: Introductionmentioning

confidence: 99%

Fault detection in the secondary side of electric arc furnace transformer using the primary side data

Marvasti

Samet

2013

Int. Trans. Electr. Energ. Syst.

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This paper presents a novel methodology for detecting fault conditions in the secondary side of electric arc furnace (EAF) transformer. The major focus of this study is to design a digital algorithm which uses solely the primary side current. Therefore, in this new methodology, only the primary side current is measured, and the fault presence in the secondary side is investigated. Here, there are two main objectives. The first objective is minimizing the fail-to-trip functioning probability, and the second one is minimizing the Mal-Trip operation probability. The fault characteristics are extracted using accurate simulation of EAFs installed in the Mobarakeh Steel Company (MSC) in Isfahan, Iran to fulfill the first objective. Three-phase field data of instantaneous current from the primary side of eight EAF transformers of MSC is also provided to evaluate performance of the proposed algorithm in the normal conditions and to achieve the second objective. The proposed algorithm is based on the sudden reduction of current harmonics in the fault conditions which is evaluated by a proposed special index which is called "the difference function" in this paper. Overall reliability assessment (dependability and security) of the proposed protective scheme demonstrates that even in this highly varying and unpredictable environment, the proposed algorithm is so precise and fast in fault detection. Figure 14. Harmonic components of one of the measured records in the normal conditions. a) Fundamental. b) Second. c) Third. d) Fourth.

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A Comprehensive Evaluation of Different Power Quantities in DC Electric Arc Furnace Power Supplies

2023

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Conventionally, DC arc furnaces are fed by thyristor rectifiers to control the level of current or power transferred to the load. With the advancement of high-power transistors, other structures such as diode rectifiers and DC choppers have been introduced and developed for the feeding system of DC electric arc furnaces. In this paper, the effect of different power supply systems on power quality indexes is discussed. In this regard, two types of feeding systems are considered, including a power supply system based on thyristor rectifiers and a power supply system based on diode rectifiers and DC choppers. In addition, different control methods, including constant current control (CCC) and constant power control (CPC), on DC electric arc furnaces are applied. For evaluating the power quality indexes, voltage and current harmonic distortion, unbalance of voltage and current, and power factor on the AC side are investigated for different power supply systems. Simulation results were performed with PSCAD/EMTDC software. It is shown that the power supply systems with diode rectifiers and DC choppers have superiority in comparison to the types based on thyristor rectifiers. According to the results, the average current THD is reduced from 16.55% in the thyristor rectifier to 8.40% in the chopper rectifiers with the CCC method and from 19.27% in the thyristor rectifier to 7.38% in the chopper rectifiers with the CPC method. Moreover, the average voltage THD is reduced from 5.67% in the thyristor rectifier to 3.02% in the chopper rectifiers with the CCC method. The result is similar to the CPC method. Furthermore, for a specific power supply system, the harmonic distortion is lower in the case of the CPC method than in the CCC method.

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A novel feeding topology for DC electric arc furnaces utilizing PWM-AC choppers

Cited by 3 publications

References 23 publications

A new matrix converter‐based feeding system for DC electric arc furnaces and a comprehensive comparison between different types of feeding topologies

A new matrix converter‐based feeding system for DC electric arc furnaces and a comprehensive comparison between different types of feeding topologies

Fault detection in the secondary side of electric arc furnace transformer using the primary side data

A Comprehensive Evaluation of Different Power Quantities in DC Electric Arc Furnace Power Supplies

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