Electric Arc Furnace (EAF) Modelling and Comparative Study of Flicker Mitigation Techniques

2019 ◽  
Vol 118 (7) ◽  
pp. 67-72
Author(s):  
Mohan Kumar. C ◽  
Vinayaka K. U
Keyword(s):  
Power System ◽  
Power Quality ◽  
Reactive Power ◽  
Steel Production ◽  
Vector Current ◽  
Electrical Network ◽  
Arc Furnace ◽  
Negative Consequences ◽  
Power Load ◽  
Voltage Flicker

In the steel production, electrical arc furnace EAF is mainly used for melting the scrap iron. In steel production is increased by using EAF. The EAF is an extremely non-linear and massive power load, but due to EAF is stochastic functioning of an EAF, in the research of the power quality enhancement is motivated. The EAF operation power quality is introduced, the power quality negative consequences decides are characteristics and non-characteristics harmonics, voltage flicker effect, low power factor that arises in the electrical network in operation of the EAF. The quality disturbance are harmonics and current flicker. In the dynamic analysis of the power quality to voltage flicker is studied. The dynamic and static analysis of the EAF we taken examined to study the survival of the voltage flicker in the power system, The analysis of the harmonic is conveyed out to current harmonic is clarify under different types of EAF operation in the power system, so that controller, filter and PWM are used. The controller is hysteresis current and vector current are used to reduce the harmonic through the filter. The pulse width modulation generates the sinusoidal waveform. The EAF operation is beyond the permitted levels as per IEEE references, so as to mitigate the harmonic  problems due to an EAF , a rapid dynamic reactive power compensation devices like series passive filter with vector current and hysteresis current controller is being proposed as a solution, The power system has been simulated using MATLAB and the results were tabulated.

scholarly journals Power Quality Improvement of Isolated Power System Network using UPQC

2020 ◽  
Vol 8 (5) ◽  
pp. 1962-1969
Keyword(s):  
Quality Improvement ◽  
Power System ◽  
Power Quality ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Unit Vector ◽  
Electrical Network ◽  
Alphabetical Order ◽  
Power Quality Improvement

The Unified Power Quality Controller (UPQC) is the Custom Power device designed for improving the power quality of the electrical network. In this paper, we proposed UPQC design for an isolated power system network to attend both voltage and current distortion by using Unit Vector template algorithm and Instantaneous Reactive Power theory. Also UPQC is designed for the hybrid generation with Hysteresis control algorithm. The power quality improvement of the power system network is the main aim . The performance analysis is done by comparing its Total Harmonic Distortion (THD). Based on its THD the quality of the power at the “Point of common coupling (PCC)”with and without compensator is quantified in this paper. Keywords : About four key words or phrases in alphabetical order, separated by commas.

scholarly journals Harmonics generated by Electric Arc Furnace in Electric Power System - A Review

2019 ◽  
Vol 11 (01) ◽  
pp. 57-62
Author(s):  
Ashutosh Srivastava ◽  
Amarjeet Singh
Keyword(s):  
Power System ◽  
Power Quality ◽  
Electrical Power ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Electric Power System ◽  
Electrical Network ◽  
Arc Furnace ◽  
Electrical Power System ◽  
Voltage Fluctuation

An electrical power system is designed to operate at the frequency of 50 Hz or 60 Hz. But there are certain loads which generate voltage and current that are the integer multiple of 50 or 60 Hz. Those higher frequencies form electrical network pollution called as power system harmonics. An Electric Arc Furnace (EAF) is one of such load when operated on AC affects the power quality of the power system. The power quality is degraded mainly due to the poor power factor, current and voltage harmonics and voltage fluctuation. The problems due the harmonics is getting worsen day by day due to the introduction of power electronics equipments and voltage fluctuation arise by the use of large industrial load such as EAFs and LMF (Ladle Melt Furnace) in steel meting shop. Also connecting rolling mill and forging shop generate harmonics in the adjacent electrical power system. In this paper, an extensive review of harmonics generated in EAF is presented .

scholarly journals Research on Transient Power Quality of Large-capacity Electric Arc Furnace

2021 ◽  
Author(s):  
Liu Yang ◽  
Qinyue Tan ◽  
Di Xiong ◽  
Zhengguang Liu
Keyword(s):  
Power Quality ◽  
Reactive Power ◽  
Short Circuit ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Normal Operation ◽  
Arc Furnace ◽  
Three Phase ◽  
Transient Power Quality

The overrun of transient power quality index caused by the large-capacity electric arc furnace (EAF) has become a prominent problem affecting the safe and stable operation of the power system. (1) In this paper, the relationship between arc furnace volt-age and current is derived based on the different stages of arc combustion, and the random variation of chaotic phenomenon of the arc voltage are simulated. Established an EAF model suitable for the study of transient power quality problems. (2) Take 50t AC EAF as an example to analyze the reactive power impact and the influence on the point of common coupling (PCC) voltage caused by the three-phase short circuit of the electrode. The results show that the experimental results are consistent with the theoretical analysis, verifying the correctness and effectiveness of the model. (3) When the three-phase short-circuit occurs, the reactive power impact is nearly 6 times that of normal operation, the short-circuit current is 2.66 times that of normal operation, and the effective value of the PCC voltage has dropped by 40.37%, which provides a theoretical basis for real-time compensation of impulsive reactive power and improvement of the transient power quality of the EAF.

Improved Mayr Model of Electrical Arc Furnace to Analyse Harmonic

2011 ◽  
Vol 110-116 ◽  
pp. 1762-1766
Author(s):  
A.M. Zare Zadeh ◽  
R. Ghandehari
Keyword(s):  
Power Quality ◽  
Time Domain ◽  
Arc Furnace ◽  
Negative Effects ◽  
The Real ◽  
Electrical Arc ◽  
Real Behavior ◽  
Voltage Flicker ◽  
Harmonic Components ◽  
The Time Domain

Voltage flicker and harmonics are power quality problems which are imposed on power system by electrical arc furnace. To study furnaces and find a solution to remove the negative effects of them, it is needed to have an appropriate electrical arc furnace model. Several methods in time and frequency domain have been presented. One of the time domain methods is Mayr model which has two problems. Firstly, it shows the harmonic components more than the real values. Secondly, it does not involve voltage flicker phenomenon. In this article with the comparison of harmonic components of Mayr model and measured values of arc furnace, an improved Mayr model is introduced. In the presented model, the problems of Mayr model are removed and it shows the real behavior of arc furnace

scholarly journals Improvement of Power Quality in Fourteen-Bus System with Three and Five Level IPFC

2019 ◽  
Vol 8 (2) ◽  
pp. 1672-1677
Keyword(s):  
Power System ◽  
Power Quality ◽  
Power Flow ◽  
Reactive Power ◽  
Quality Enhancement ◽  
Power Fluctuation ◽  
Real Power ◽  
Bus Structure ◽  
Simulation Results ◽  
Power Flow Controller

The power fluctuation is a major problem faced by the consumers in power system,to resolve thisInterline Power Flow Controlleris used. This article proposes three and five-level Interline Power Flow Controller for power quality enhancement of fourteen bus structure. The main objective of this article is to diminish the THDcreated by IPFC. Simulations carried out and it results indicate that there is an improvement in the output of IPFC in terms of THD, real power, and reactive power. The simulation results indicate that THD of Five Level Based IPFC (FLBIPFC) is less than that of the Three-Level Based IPFC (TLBIPFC) for fourteen bussystem.

Harmonic Compensation using STATCOM for SEIG Feeding Single-Phase Load Connected between Different Phases

2017 ◽  
Vol 6 (3) ◽  
pp. 489
Author(s):  
Satyanarayan Gorantla ◽  
Goli Ravi Kumar
Keyword(s):  
Power System ◽  
Power Quality ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Induction Generator ◽  
Generator System ◽  
Synchronous Reference Frame ◽  
Linear Load ◽  
Non Linear ◽  
Non Linear Load

The paper presents the analysis of harmonic distortion when non-linear load is connected in different phases of power system with STATCOM for singly excited induction generator system with wind turbine as prime mover. Now-a-days due to the drastically increased in use of non linear loads causes many power quality problems in power system network. Those problems are classified as reactive power problems, harmonics, voltage sags and swells. Out of these problems harmonic problems are major concern. Custom power devices proposed for mitigation of power quality in network. For compensation of harmonic, static compensator (STATCOM) is used. The paper presents the compensation of harmonic power quality issues using STATCOM for the system with singly-excited induction generator feeding non-linear load connected in different phases. STATCOM is controlled using synchronous reference frame theory to produce pulses to switches of STATCOM sensing the input parameters. Proposed concept was developed using MATLAB/SIMULINK software and results are presented for non-linear load connected in different phases of the power system. THD analysis was shown for source current and load current for different cases.

scholarly journals Fault Clearance in Nine-Bus system using Custom Power Devices

2020 ◽  
Vol 9 (2) ◽  
pp. 1756-1762 ◽  
Keyword(s):  
Power System ◽  
Power Quality ◽  
Reactive Power ◽  
Vital Role ◽  
Machine System ◽  
Facts Devices ◽  
Three Phase ◽  
Compensating Devices ◽  
Fault Clearance

The power transfer capability of a system determines the power quality and the reliability of the power system. The transmission side of the power system is of different configuration. This paper involves the modeling of a three-phase multi-machine system with nine bus configurations. The system is subjected to different fault conditions. The system is modeled with the help of MATLAB- Simulink. The power quality of the system is analyzed. The system active and the reactive power can be compensated by the FACTS devices. The FACTS devices are power compensating devices that play a vital role in increasing the power quality of the system. The three-phase multi-machine system is integrated with the FACTS devices like STATCOM and UPFC and different parameters where analyzed

Simulation and Research of the EAF Characteristics under Voltage Flicker Using MATLAB

2012 ◽  
Vol 203 ◽  
pp. 416-421
Author(s):  
Lei Hu ◽  
Zhen Huang ◽  
Bo Wen Chen
Keyword(s):  
Power System ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Furnace Operation ◽  
Operating Conditions ◽  
Domain Model ◽  
Arc Furnace ◽  
Linear Behavior ◽  
Non Linear ◽  
Voltage Flicker

Ower quality is becoming a more concern of today’s power system engineer due to the rapid growth of non-linear loads, such as power electronic control equipment and electric arc furnace (EAF). Harmonics and voltage flicker are the power quality problems which are introduced to the power system as result of non-linear behavior of the electric arc furnace operation. There are numbers of arc furnace models. This paper presents a time domain model which is used to study its behavior on the power system using MATLAB. To analyze the method, several characteristics for different operating conditions are investigated.

scholarly journals Impact Analysis of Large-Scale Wind Farms Integration in Weak Transmission Grid from Technical Perspectives

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5513
Author(s):  
Shah Rukh Abbas ◽  
Syed Ali Abbas Kazmi ◽  
Muhammad Naqvi ◽  
Adeel Javed ◽  
Salman Raza Naqvi ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Power System ◽  
Power Quality ◽  
Seasonal Variations ◽  
Large Scale ◽  
Reactive Power ◽  
Wind Farms ◽  
Test System ◽  
Active Power ◽  
Wake Effect

The integration of commercial onshore large-scale wind farms into a national grid comes with several technical issues that predominately ensure power quality in accordance with respective grid codes. The resulting impacts are complemented with the absorption of larger amounts of reactive power by wind generators. In addition, seasonal variations and inter-farm wake effects further deteriorate the overall system performance and restrict the optimal use of available wind resources. This paper presented an assessment framework to address the power quality issues that have arisen after integrating large-scale wind farms into weak transmission grids, especially considering inter-farm wake effect, seasonal variations, reactive power depletion, and compensation with a variety of voltage-ampere reactive (Var) devices. Herein, we also proposed a recovery of significant active power deficits caused by the wake effect via increasing hub height of wind turbines. For large-scale wind energy penetration, a real case study was considered for three wind farms with a cumulative capacity of 154.4 MW integrated at a Nooriabad Grid in Pakistan to analyze their overall impacts. An actual test system was modeled in MATLAB Simulink for a composite analysis. Simulations were performed for various scenarios to consider wind intermittency, seasonal variations across four seasons, and wake effect. The capacitor banks and various flexible alternating current transmission systems (FACTS) devices were employed for a comparative analysis with and without considering the inter-farm wake effect. The power system parameters along with active and reactive power deficits were considered for comprehensive analysis. Unified power flow controller (UPFC) was found to be the best compensation device through comparative analysis, as it maintained voltage at nearly 1.002 pu, suppressed frequency transient in a range of 49.88–50.17 Hz, and avoided any resonance while maintaining power factors in an allowable range. Moreover, it also enhanced the power handling capability of the power system. The 20 m increase in hub height assisted the recovery of the active power deficit to 48%, which thus minimized the influence of the wake effect.

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