Simulink based optimization of SPWM multilevel inverter with phase shift and dual carrier at each level
01 Jan 2011-pp 1-7
About: The article was published on 2011-01-01. It has received 1 citations till now. The article focuses on the topics: Total harmonic distortion & Harmonic analysis.
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21 Feb 2020
TL;DR: In this paper, a carrier phase shift modulation method applied to a modular multilevel matrix converter (MMMC) was proposed, where the number of MMMC (Modular Multilevel Matrix Converter) modules is an even number.
Abstract: The invention discloses a novel carrier phase shift modulation method applied to a modular multilevel matrix converter, and provides novel carrier phase shift modulation mainly for overcoming defectsof the traditional carrier phase shift modulation when the number of MMMC (Modular Multilevel Matrix Converter) modules is an even number. On the basis of the traditional carrier phase shift modulation strategy, the modulation of one control signal and one triangular carrier is changed into the modulation of one control signal and two triangular carriers, the phase shift of the two triangular carriers is T/(2k), T is the period of the triangular carriers, and k is the number of H-bridge sub-modules on a bridge arm; the two obtained trigger signals are summed at first; then sing symbolic operation is performed; and finally, the obtained trigger signal is used for controlling four IGBTs of the H-bridge sub-modules, so that the output voltage conditions of the H-bridge sub-modules of the bridge arm are mutually different in a pairwise manner, and the total output level number of the H-bridge sub-modules of the bridge arm is expanded. According to the method, the output voltage and currenteffects of the MMMC can be effectively improved, and the use of the H-bridge sub-modules on the bridge arm can be reduced to a certain extent.