Journal ArticleDOI
A New Static Var Compensator for an Arc Furnace
TLDR
In this paper, an electronic compensator that can compensate the reactive current drawn by an arc furnace is presented, consisting of three independent single-phase pulsewidth modulated (PWM) inverters.Abstract:
This paper presents the design of an electronic compensator that can compensate the reactive current drawn by an arc furnace. Consisting of three independent single-phase pulse-width modulated (PWM) inverters, the proposed compensator responds quickly to any sudden load changes and compensates both the fundamental displacement current and the harmonic distortion current drawn by the load. Unlike conventional static var compensators, the electronic compensator can also supply the active current demanded by the load if an energy source independent of the utility is available. Simulations are conducted, including the modelling of the furnace current and voltage waveforms during the early stage of scrap melting, in order to determine the effectiveness of several suggested detection methods that can be used to separate the active and reactive components of the furnace current. Actual waveforms observed on a local furnace are included that corroborate the computer modelling. Experimental results indicate that the electronic compensator equipped with a suitable detection circuit can accurately compensate an arc furnace.read more
Citations
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Journal ArticleDOI
A review of active filters for power quality improvement
TL;DR: This paper presents a comprehensive review of active filter configurations, control strategies, selection of components, other related economic and technical considerations, and their selection for specific applications.
Journal ArticleDOI
Modeling devices with nonlinear Voltage-current Characteristics for harmonic studies
G. Chang,Constantine J. Hatziadoniu,Wilsun Xu,P. Ribeiro,R. Burch,W.M. Grady,Mark Halpin,Y. Liu,Satish J. Ranade,D. Ruthman,Neville R. Watson,T.H. Ortmeyer,J. Wikston,Aurelio Medina,Alfredo Testa,R. Gardinier,Venkata Dinavahi,F. Acram,Peter W. Lehn +18 more
TL;DR: In this article, the modeling of harmonic sources with nonlinear voltage-current characteristics such as transformers, iron-core reactors, rotating machines, arc furnaces, energy efficient lightings, and some household electronic appliances are reviewed.
Proceedings ArticleDOI
An active filter for unbalanced three-phase system using synchronous detection method
TL;DR: In this paper, an active power filter using synchronous detection was proposed to eliminate line current harmonics and compensate the reactive current component in an unbalanced three-phase power system.
Journal ArticleDOI
A new UPS scheme provides harmonic suppression and input power factor correction
Jinn-Chang Wu,Hurng-Liahng Jou +1 more
TL;DR: A new parallel processing uninterruptible power supply (UPS) configuration is proposed that provides active power line conditioning to minimize mains current distortion and is superior to a conventional UPS.
Journal ArticleDOI
Investigation Performance of Marine Equipment with Specialized Information Technology
TL;DR: In this paper, a real-time identification of harmonic composition of the distorted signals (voltages and currents) of autonomous electric power systems with inconsistent frequency, phase and amplitude, and which can be greatly distorted.
References
More filters
Book
Handbook of Filter Synthesis
TL;DR: In this article, the authors present the theory of effective PARAMETERS in terms of the effectiveness of different types of filters in the real-time domain and the effect of different filters on the performance of the network.
Book
Introduction to Communication Systems
TL;DR: In this paper, the authors present a classification of signals and their properties, including the Fourier Transform and its application in the context of signal propagation in AM systems, as well as a comparison of different types of AM systems.
Journal ArticleDOI
Principles and Applications of Static, Thyristor-Controlled Shunt Compensators
TL;DR: In recent years, there has been a rapid increase in the number of thyristor-controlled shunt compensators used in industrial and utility systems for dynamic power factor correction and terminal voltage stabilization as mentioned in this paper.
Journal ArticleDOI
New Static VAR Control Using Forced-Commutated Inverters
TL;DR: In this article, the authors describe the system outline and the operating results of a new type of 20MVA Static VAR Generator (SVG), which is already in operation in electric power field since January of 1980.
Journal ArticleDOI
Reactive Power in Nonsinusoidal Situations
TL;DR: In this article, the authors interpreted reactive power as a time-domain reciprocating flow of energy, with a formulation that is valid for any periodic waveforms and showed that the current can be resolved into orthogonal components, and that the power components can be measured with practical instrumentation.