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Arc-furnace model for the study of flicker compensation in electrical networks

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5 Author(s)
Montanari, G.C. ; Istituto di Elettrotecnica Ind., Bologna Univ., Italy ; Loggini, M. ; Cavallini, A. ; Pitti, L.
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This paper presents an arc-furnace model consisting of nonlinear, time varying resistance where time-variation laws of arc length are considered. One consists of a periodic, sinusoidal law, the other of a band-limited white-noise law. The arc-furnace model is implemented by EMTP, referring to actual electric-plant configurations. Simulations are reported where the values of flicker sensation and short-term flicker severity PST, are determined according to UIE specifications. The results show that the model based on the sinusoidal time-variation law can be useful for worst-case approximations, while the model using white-noise law is able to fit flicker measurements made in electric plants supplying arc furnaces. The models are used to investigate the effect on flicker compensation of the insertion of series inductors at the supply side of the furnace transformer. It is shown that considerable reduction of PST is obtained at the point of common coupling by series inductor installation at constant furnace active power

Published in:

Power Delivery, IEEE Transactions on  (Volume:9 ,  Issue: 4 )

Date of Publication:

Oct 1994

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