Title An optimization approach for modulation in multilevel converters
Authors Gordillo, Francisco , GÓMEZ-ESTERN AGUILAR, FABIO, Salas, Francisco
External publication No
Means Ieee Industrial Electronics Society
Scope Proceedings Paper
Nature Científica
Publication date 01/01/2016
ISI 399031205049
Abstract In the control of power converters, it is well known that the modulation strategy can be used not only for the discretization of averaged control signals, but also for the fulfillment of additional control objectives, such as voltage balance among capacitors or common mode reduction. The resulting number of switches is an important issue since the fulfillment of these additional objectives usually leads to an increase in the number of switches and, thus, in power losses. In this paper, the modulation stage is formulated as an optimization problem in order to minimize the number of switches. The resulting problem is formulated as an linear, mixed-integer programming problem that can be solved offline and the solution can be stored as a look-up table for its use during online operation. The resulting approach is applied to a 3-phase, 5-level diode-clamped converter (DCC) working as rectifier. Simulation results are presented.
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