A simplified space-vector modulation algorithm for four-leg NPC convertersTools Rojas, Felix, Cardenas, Roberto, Kennel, Ralph, Clare, Jon C. and Diaz, Matias (2016) A simplified space-vector modulation algorithm for four-leg NPC converters. IEEE Transactions on Power Electronics, 32 (11). pp. 8371-8380. ISSN 1941-0107 Full text not available from this repository.
Official URL: http://ieeexplore.ieee.org/document/7592426/
AbstractTo interface generation sources and loads to four-wire distribution networks is important to use power converters and modulation methods which provide high performance, flexi¬bility and reliability. To achieve these goals, this paper proposes a simple and efficient Space Vector Modulation (SVM) algorithm in α3-y coordinates for Neutral Point Clamped (NPC) converters. The proposed SVM method reduces a three-dimensional (α3-y) search of the modulating vectors into a simple two-dimensional (α3) problem. Moreover, the algorithm provides full utilisation of the dc-link voltage, full utilisation of the redundant vectors and it can be applied to any other four-leg converter topology. The proposed SVM has been successfully validated using a 6kW three-level four-leg NPC converter, achieving control over the voltages of the dc-link capacitors and simple definition of switching pattern for shaping frequency spectrum.
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