Yacine Djeghader

• Full Prof
• Professor (Associate) at University of Souk Ahras

In modern steel industry, Electric Arc Furnaces are widely used for iron and scarp melting. The operation of electric arc furnace causes many power quality problems such as harmonics, unbalanced voltage and flicker. The factors that affect Electric arc furnace operation are the melting or refining materials, melting stage, electrodes position (arc...

Researchers have emphasized in several studies the importance of microgrids for efficiently utilizing renewable energy-based production systems. In this article, we examine the control of two parallel inverters powered by different renewable energy sources. Each inverter is equipped with a battery that operates during low production periods and is...

Modern energy networks are increasingly challenged by the proliferation of electronic devices and nonlinear loads, which lead to voltage waveform distortions, frequency fluctuations, and amplitude variations. These disturbances can significantly compromise the stability and quality of power supply. The Unified Power Quality Conditioner (UPQC) serve...

This paper focuses on mitigating various power quality issues from electric arc furnaces (EAF) in steel plants, including voltage flicker, sag, swell, and harmonics. Arc furnaces are recognized as one of the industry's most nonlinear electrically polluting loads. The proposed solution in this article to address all power quality issues caused by EA...

Introduction. With the increasing complexity of power systems and the integration of diverse energy sources, issues such as voltage sags, swells, and signal distortions have emerged as critical challenges. These power quality problems can result in equipment malfunction, production downtime, and financial losses for industries, as well as inconveni...

Artificial neural network and discrete wavelet transform for inter-turn short circuit and broken rotor bars faults diagnosis under various operating conditions Introduction. This work presents a methodology for detecting inter-turn short circuit (ITSC) and broken rotor bars (BRB) fault in variable speed induction machine controlled by field oriente...

Introduction. This work presents a methodology for detecting inter-turn short circuit (ITSC) and broken rotor bars (BRB) fault in variable speed induction machine controlled by field oriented control. If any of these faults are not detected at an early stage, it may cause an unexpected shutdown of the industrial processes and significant financial...

The electrical network is the set of elements where loads are connected to the generation plants by transmission lines. They can be either overhead or underground cables. A new technology has been introduced to replace these transmission lines with underground cables gas insulated line “GIL”. The latest has many advantages over underground cables a...

In this paper, a control without speed sensor with extended Kalman filter (EKF) for command a permanent magnet synchronous motor (PMSM) speed rotor position estimation is proposed. The direct torque control (DTC) technique for permanent magnet synchronous motor (PMSM) is receiving increasing attention due to the significant advantages of low depend...

Due to remarkable development in power electronics, the use of non-linear loads has become prominent. These loads draw distorted (non-sinusoidal) currents from the power supply (harmonics generation) resulting in an increase in harmonics injected into the power system. This article presents the Unified Power Quality Conditioner (UPQC) for compensat...

This study investigates and filters harmonics currents generated by a hybrid system with a storage system (photovoltaic-wind-battery) for Household Applications. In this paper, we prefer to use passive filtering to mitigate the harmonic's currents especially the passive tuned filter (single and multiple). This method is the most used because it's c...

Renewable energy sources especially solar energy connected to an electrical grid system by using power electronic devices, known that devices degrade the power quality and especially generate harmonic currents. This article presents the study investigation and propagation of harmonics in the integration system of an electric grid connected to the p...

This study investigates and filters harmonics currents generated by a hybrid system with a storage system (photovoltaic-wind-battery) for Household Applications. In this paper, we prefer to use passive filtering to mitigate the harmonic’s currents especially the passive tuned filter (single and multiple). This method is the most used because it's c...

This document presents a new hybrid combination of filters using passive and active elements because of the generalization in the use of non-linear loads that generate harmonics directly affecting the symmetry of energy transmission systems that influence the functioning of the electricity grid and, consequently, the deterioration of power quality....

This paper deals with the improvement of the energy quality using shunt active power filter. The three-phase grid-connected photovoltaic generator consists in solar panels, a three-phase voltage inverter connected to the grid and a nonlinear load constituted by a diode rectifier bridge supplying a resistive load in series with an inductor. In so do...

With the aim to improve the quality of the energy a photovoltaic generator is connected to the electrical network by associating the functionalities of shunt active power filter. In this work, a system consists of a field of solar panels, a three-phase voltage inverter connected to the grid and a non-linear load constituted by a diode rectifier bri...

The increasing use in the industry of non-linear loads based on the power electronic elements introduced serious perturbation problems in the electric power distribution grids. One of the parameters of this system is the waveform which must be as close as possible to a sinusoid. Line currents of three-phase and twelve bridge rectifier suffer from h...

This paper presents the photovoltaic system connected to electrical grid with the presence of non-linear load (three-phase rectifier) in the first case, then tries to minimize the harmonic currents generted by this non-linear load with applying the technology of the shunt active power filter (SAPF). In this work, we use the MPPT controller for the...

Abstract - DC Electrified Railway Systems is subjected to problems of quality of supply in particular the injection of the harmonic currents. This paper deals with the problem of harmonic filtering solutions in an Algerian traction substation, which supplies a railway transmission line. In this practical application, the proposed solution for harmo...

Abstract: The railways are the most important and modern means of transportation are used to transport a large number of people, and also used in the industrial field to transport heavy weight and raw materials for very long distances. Direct current (DC) electrified railway systems show many power quality problems such as harmonic, reactive power,...

In this paper, we present a Hybrid Power Filter (HPF) which consists of a combined system of Passive Filter (PF) and Series Active Power Filter (SAPF) has been designed by MATLAB/SIMULINK approach for harmonic and reactive power compensation. This filter is a three level PWM voltage source inverter and we use a Fuzzy Logic Controller (FLC) algorith...

In Steel Industry a DC electric arc furnace (DC EAF) is an important nonlinear time-varying load in power system. The operation of DC EAF causes many power quality problems especially they generate currents harmonics. In this paper we present a model of DC Electric Arc Furnace based on the stochastic nature of the electric arc current-voltage chara...

The railway is a way that meets the country's economy, particularly in the agricultural and industrial sectors same as in the transport of people. Direct current (DC) electrified railway systems show power quality problems such as harmonic current pollution. In this article we made a model in Matlab/Simulink of a real DC traction substation which i...

Dans cette recherche nous avons étudié le four à arc électrique qui est devenu petit à petit un acteur primordial de la sidérurgie mondiale, au début (chapitre I), nous avons présenté les technologies des fours à arc et leurs développements, ainsi que leurs rôles dans l’augmentation de la production mondiale en matière d’acier. Puis (chapitre II),...

This paper describes different power quality problems in distribution systems and their solutions with power electronics based equipment. A hybrid power filter in combined system of shunt passive and series active power filter has been designed and simulate with Matlab/Simulink. This filter is a three level PWM voltage source inverter and we use a...

The railways are used to transport people, but also for the industry. In this article we present a simulation of real DC traction power supply that intended to transport the natural resources (iron, ore and phosphate) from its source to the industrial areas. We made a model in Matlab/Simulink of a DC traction substation which is located in the mine...

Abstract: It is very well known that electric arc furnace (EAF) as a three-phase charge one of the most important generators of harmonic currents, reactive power and unbalanced conditions in electrical power systems. To study the effect of the harmonics, it is necessary to know the values of the electrical parameters of the arc furnace electrical i...

Electric Arc electric (EAFs) highly reduce power quality of the network by generating disturbances such as flicker and harmonics. The harmonics created by powerful nonlinear loads and abrupt changes of such loads (EAF) can considerably worsen quality of the buses voltage feeding of such loads. In this paper we presents a new electric arc furnace mo...

ABSTRACT In modern steel industry, Electric Arc Furnaces (EAFs) are widely used for iron and scarp melting. The operation of electric arc furnace causes many power quality problems. They generate current harmonics including low frequency and cause of flicker. It is important to build a practical model to describe the behaviour of electric arc furn...

Abstract_In recent years, harmonics are considered as one of the most essential problems in electrical power systems, Even though, this new highly efficient electronic technology provides improved product quality with increased productivity by the use of smaller and lighter electrical components but they are the sources of harmonics. As a result, t...

Electrical arc furnaces are commonly employed in industry to produce molten steel by melting iron and scrap steel. Furnace control is a necessary operation for production optimization. The principal parameters to be controlled are: maximum productivity requirements, minimum power off time, good power quality and safety. The aim of this study is to...

To maximise furnace production it's necessary to optimise furnace control, with the objectives of achieving maximum power input into the melting process, minimum network distortion and power-off time, without compromise on quality and safety. This can be achieved with on the one hand by an appropriate electrode control and on the other hand by a mi...

Abstract: Electrical arc is a stochastic process; witch is the principal cause of power quality problems, including voltages dips, harmonic distortion, unbalance loads and flicker. So it is difficult to make an appropriate model for an EAF. The factors that effect EAF operation are the melting or refining materials, melting stage, electrode positio...

Abstract_ DC electric arc furnace is an important nonlinear time-varying load in power system. Due to the adverse effects produced by the operation of arc furnace, it is important to build a practical model to describe the behaviour of electric arc furnace. This paper presents a DC Electric Arc Furnace the model is based on the stochastic nature of...