Harmonic and transient overvoltage analyses in arc furnace power systems

Mendis, S.R.; Gonzales, D.

doi:10.1109/icps.1990.66252

Cited by 7 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Los componentes armónicos pueden además cambiar con diferentes etapas de fundición [6]. Asimismo, la ocurrencia de fenómenos transitorios de sobrevoltaje es presentada en [7] mientras que una "característica caótica" se reporta en [8] debido a la dinámica del funcionamiento del horno de arco. Adicionalmente, en [9] se reporta el efecto negativo de los hornos de arco en la estabilidad de frecuencia debido a su comportamiento intermitente, ante lo cual se debe definir algún mecanismo de compensación de potencia activa.…”

Section: Introductionunclassified

Caracterización y simulación de fenómenos dinámicos relacionados con la actuación de un horno de arco eléctrico conectado al sistema eléctrico de potencia de Ecuador

Hierro¹,

Cepeda²

2021

View full text Add to dashboard Cite

La operación de los hornos de arco eléctrico (EAF) causa variaciones en las variables eléctricas, como son: potencia activa, reactiva, voltaje y frecuencia. Estas variaciones se deben al funcionamiento propio del EAF que produce un consumo altamente intermitente, lo que lo hace una carga especial. Este trabajo presenta una metodología para el análisis e interpretación de los datos registrados por el sistema SCADA/EMS y el sistema de monitoreo de área extendida WAMS, durante la operación de un EAF conectado al sistema eléctrico de potencia (SEP) de Ecuador. El propósito de este análisis es caracterizar las perturbaciones a través de las variables eléctricas frecuencia, voltaje, potencia activa y reactiva, medidas en la Subestación más sensible a la operación del EAF. Para esto, se realiza un análisis de datos multivariantes basado en Funciones Empíricas Ortogonales EOF, junto con clasificadores inteligentes. Adicionalmente, se propone un modelo de EAF para simulación de transitorios electromecánicos, el cual se basa en un tren de pulsos de ancho modulado (Pulse-width modulation PWM), afectado por una señal de ruido de frecuencia parametrizable. Tanto la propuesta metodología para caracterización de la actuación del EAF a través de registros, como el modelo propuesto muestran prometedores resultados respecto de la evaluación post-operativa y de planeamiento operativo del impacto de la operación de un EAF en el SEP.

show abstract

Section: Introductionunclassified

Caracterización y simulación de fenómenos dinámicos relacionados con la actuación de un horno de arco eléctrico conectado al sistema eléctrico de potencia de Ecuador

Hierro¹,

Cepeda²

2021

View full text Add to dashboard Cite

show abstract

“…In last decades, the uses of the power electronics devices have been increased significantly in many fields such as adjustable speed drives [1], arc furnaces [2], electric vehicle battery chargers [3], lighting equipment such as compact fluorescent and LED lamps [4] and in renewable energy sources. Despite its benefits [5], the uses of power electronics devices shifted the electrical loads from linear to non-linear i.e.…”

Section: Introductionmentioning

confidence: 99%

A photovoltaic integrated unified power quality conditioner with a 27-level inverter

Saleh

Hantouli²

2019

TELKOMNIKA

View full text Add to dashboard Cite

This paper presents a Unified Power Quality Conditioner (UPQC) with a 27-level inverter based on an asymmetric H-bridge topology. Each phase of the inverter is composed of three H-bridges, supplied by three DC sources scaled in the power of three. The output of the multilevel inverter is connected directly to the point of common coupling (PCC) without the need to a transformer or a filter. The calculation of the Shunt Active Power Filter (SAPF) compensation current is based on the generalized theory of synchronous frame (d-q theory) while the calculation of a series active filter voltage is based on Instantaneous Reactive Power (p-q theory). The control of the SAPF is achieved by using a closed-loop vector control followed by a new multilevel modulation technique. In addition to the capability of harmonic elimination of both current and voltage drawn from the source, the UPQC can produce real and reactive power to feed the loads during prolonged voltage outages or source shortage. Batteries pack are used as a dc link, which is charged from photovoltaic array connected to the battery through a maximum power point tracker and charge controller. The injection of real and reactive power depends on the state of charge (SOC) of batteries, the frequency of the system, real and reactive power of the load, and power factor at the point of PCC. The proposed UPQC strategy is simulated in MATLAB SIMULINK and the results have shown a significant improved in Total Harmonics Distortion (THD) of both the voltage and currents.

show abstract

“…Moreover, the harmonic components can change with different melting stages. Transient overvoltage phenomena are reported in [6], while chaotic characteristic is observed in [7] due to the dynamics of the arc furnace operation.…”

Section: Introductionmentioning

confidence: 99%

An adaptive arc furnace model

Zheng

Makram

2000

IEEE Trans. Power Delivery

112

View full text Add to dashboard Cite

This paper presents an adaptive arc furnace model. The integrated model is divided into three parts, the supply system model, the nonlinear load model and the controller model. First, the supply system is represented by a set of linear differential equations. Simulation is achieved by a numerical method and the measurements are taken as the control input. Secondly, based on the arc melting process and typical arc furnace -characteristic, the arc furnace load is described as a current-controlled nonlinear resistance. The pattern of nonlinear resistance is controlled by the average arc length, which reflects the arc furnace operating condition. Finally, the rectangular approximation of arc voltage is adopted by the controller to generate the arc power-arc length and the arc current-arc length curves. This information combined with the arc furnace operation and measurement information is used for the control scheme to determine the arc length and arc furnace transformer tap. Thus, the proposed adaptive arc furnace model is suitable for different operating conditions. This model is also compared with the existing arc furnace models, which provides its validity. The effect of arc furnace load on power system is also studied through the proposed model. Index Terms-Arc furnace, harmonic analysis, nonlinear load.

show abstract

Harmonic and transient overvoltage analyses in arc furnace power systems

Cited by 7 publications

References 4 publications

Caracterización y simulación de fenómenos dinámicos relacionados con la actuación de un horno de arco eléctrico conectado al sistema eléctrico de potencia de Ecuador

Caracterización y simulación de fenómenos dinámicos relacionados con la actuación de un horno de arco eléctrico conectado al sistema eléctrico de potencia de Ecuador

A photovoltaic integrated unified power quality conditioner with a 27-level inverter

An adaptive arc furnace model

Contact Info

Product

Resources

About