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New strategy of control at low flicker level for DC electrical arc furnace converter

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5 Author(s)
F. Richardeau ; Lab. d''Electrotech. et d''Electron. Ind., ENSEEIHT, Toulouse, France ; Y. Cheron ; J. du Parc ; C. Glinski
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Low frequency conducted disturbances are usually induced by AC arc furnaces supplies: harmonic currents and flicker. That is why modern installations use a DC supply, less pollutant and sparing of electrodes. However, this process is not sufficient to reduce flicker during the melting sequence. On the basis of this problem, a structure of a modified bridge rectifier operating in a natural switching mode, has been studied and simulated. This converter allows a simultaneous control of the DC current and reactive power to the point common of coupling without using a Static Var Compensator. A large reduction of flicker is thus obtained at low cost. Moreover, operating at constant power is possible without overloading the semiconductors, the transformer and upstream network

Published in:

Industrial Technology, 1994., Proceedings of the IEEE International Conference on

Date of Conference:

5-9 Dec 1994