Synthesis and Evaluation of Fast Onload Multitap Changers for Flicker Compensation in AC Arc Furnaces

Olay, Carlos Cagigal; Fernandez, Santiago Monteso; Bayo, Araceli Hernández; Rodríguez, Juan; García, Salvador Martínez

doi:10.1109/tpwrd.2014.2349431

Cited by 7 publications

(2 citation statements)

References 14 publications

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“…They can quickly move from an open circuit to a short circuit condition during the early stages of melting, which distinguishes them from other types of loads [1]. The time-varying and nonlinearity properties of EAFs result in waveform distortions and voltage variations [2][3][4]. The functioning, power production, and efficiency of the arc furnace are impacted by flicker and harmonic pollution.…”

Section: Introductionmentioning

confidence: 99%

Optimized time varying parameters of the power balance equation model for electric arc furnaces

Babaei,

Samet

2024

IET Generation Trans & Dist

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An accurate model of electric arc furnaces (EAFs) is required to analyse their impact on the system's power quality. One of the well‐known approaches to model EAF is using the power balance equation. This model has two terms, each one has a coefficient named the model parameter. Also, both terms are powered to values, which are called model orders. So, the model includes two model parameters and two model orders. Model orders highly affect the modelling precision. The optimum model orders have not been obtained yet in previous studies. Here, based on many actual records from EAFs, the best model orders for refining, melting, and scrapping stages are attained. Unlike the original power balance equation which has constant model parameters, the first proposed model uses the attained optimal model orders with the time‐varying model parameters. In the second proposed model, the model orders are also considered time‐varying. Model parameters, which are updated every 10 ms, are obtained using autoregressive moving average (ARMA) models. The correctness of the models is assessed by calculating some important electric quantities using the actual data and the proposed models. Finally, the time‐varying parameters are generated using two MATLAB codes.

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Section: Introductionmentioning

confidence: 99%

Optimized time varying parameters of the power balance equation model for electric arc furnaces

Babaei,

Samet

2024

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…EAF has unbalanced, non-linear, and time-varying characteristics. The non-linear and time-varying characteristics cause to spread of a wide range of harmonics and voltage fluctuations, called flicker [2][3][4]. Flicker and harmonics pollution not only affect the arc furnace operation, power output, and efficiency but also harm the power system quality [5].…”

Section: Introductionmentioning

confidence: 99%

Enhanced models with time‐series coefficients used for electric arc furnace

Babaei

Samet

Jalil

2023

IET Generation Trans & Dist

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Electric arc furnace (EAF) is one of the most disturbing loads in the power system as it is highly time-varying and nonlinear. In this paper, new models based on the instantaneous EAF voltage and current, recorded from EAFs in Mobarakeh steel company in Isfahan/Iran are proposed. The focus of this paper is on developing efficient models based on the Schwarz model where three modified types are proposed. The original Schwarz model has four constant parameters. Unlike the original Schwarz model which uses invariant parameters, the time-varying nature of the arc's parameters is considered in the proposed models. The first modified model has two constant model orders and two time-varying coefficients. Additionally, to further enhance the model's accuracy, in the second modified model, six parameters include three constant model orders, and three time-varying coefficients exist. The third model uses all the original model's parameters as time-series parameters. The parameters of the time-varying model are derived using autoregressive moving average (ARMA) models. The accuracy of the proposed model is evaluated by calculating the active power, harmonics, instantaneous flicker, and short-term flicker. Finally, three MATLAB codes are provided to generate the model parameters time series.

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An innovative approach considering active power and harmonics for modeling the electric arc furnace along with analyzing time-varying coefficients based on ARMA models

Babaei

Samet

Jalil

2023

International Journal of Electrical Power & Energy Systems

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Synthesis and Evaluation of Fast Onload Multitap Changers for Flicker Compensation in AC Arc Furnaces

Cited by 7 publications

References 14 publications

Optimized time varying parameters of the power balance equation model for electric arc furnaces

Optimized time varying parameters of the power balance equation model for electric arc furnaces

Enhanced models with time‐series coefficients used for electric arc furnace

An innovative approach considering active power and harmonics for modeling the electric arc furnace along with analyzing time-varying coefficients based on ARMA models

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