A New Static Var Compensator for an Arc Furnace

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...

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Bibliographic Details
Published in:IEEE transactions on power systems 1986-08, Vol.1 (3), p.110-119
Main Authors: Cox, M. D., Mirbod, A.
Format: Article
Language:English
Subjects:
Applied sciences
Current supplies
Electrical engineering. Electrical power engineering
Exact sciences and technology
Frequency
Furnaces
Harmonic distortion
Miscellaneous
Power harmonic filters
Power system harmonics
Pulse inverters
Pulse width modulation inverters
Static VAr compensators
Various equipment and components
Voltage
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Summary: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.
ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.1986.4334963