Abstract
Static converters are very important element in controlled drive systems. The development of the power semiconductor elements has revolutionized the field of electric power control and has permitted the improvement and the diversification of the electric energy converter. Loads with highly distorted current waveforms also have a very poor power factor; because of this, they use excessive power system capacity and could be a cause of overloading. The power supply from the Oltenia open pit coal mine machinery consists of electrical cables from 20/6 kV transformer station rigged with 4 or 6 MVA transformers counting 188 pieces, providing 1263,3 MVA rated capacity.
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References
M. Iordache, L. Dumitriu, “Electrical Circuits Theory,” Editura Matrixrom, ISBN 978–973-755–174-0, Bucuresti 2007, pag.190-216
M.D. Marcu, M.D.Orban, K.Yanakiev, E.Kartzelin, “Static converters and their applications”Univ.of Mining and Geology St.Ivan Rilski, ISBN 954–97748-35–9, Sofia 2001, pg.91-97
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*** Research work no.20/2006 `` The energy quality study in the lignite open pits in conditions of introducing the power electronics for respecting the european standards`` University of Petrosani - S.N.L.Oltenia
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Daniel, M.M., Daniela, O.M. (2010). Some aspects of bucket wheel excavators driving using PWM converter – asynchronous motor. In: Elleithy, K. (eds) Advanced Techniques in Computing Sciences and Software Engineering. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3660-5_58
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DOI: https://doi.org/10.1007/978-90-481-3660-5_58
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