Comparison of phase-shifted and level-shifted PWM in the modular multilevel converter
Tipo de documentoTexto en actas de congreso
Fecha de publicación2014
EditorInstitute of Electrical and Electronics Engineers (IEEE)
Condiciones de accesoAcceso restringido por política de la editorial
This paper reports a comparison study of different carrier-based PWM techniques applied to the modular multilevel converter. Phase-disposition PWM (PD-PWM) and phase-shifted pulse-width modulation (PS-PWM) with non-interleaving and interleaving are considered in this study. In PS-PWM, two cases are evaluated. In the first case, the particular SMs that have to be activated/deactivated are defined by a voltage balancing algorithm, which is the same one implemented in PD-PWM. In addition, an algorithm to restrict the number of switching SMs is also implemented to reduce the switching frequency of the power devices. In the other case of PS-PWM, each sub-module (SM) has a carrier signal associated to it and capacitor voltage balance is achieved by individual control of its capacitor voltage. The circulating current is controlled to be a dc component in all the cases. Simulation and experimental results are presented to evaluate the quality of the line-to-line output voltages and SM capacitor voltage ripples for the different cases under study. © 2014 IEEE.
CitaciónDarus, R. [et al.]. Comparison of phase-shifted and level-shifted PWM in the modular multilevel converter. A: International Power Electronics Conference. "Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE-ASIA), 2014 International". Hiroshima: Institute of Electrical and Electronics Engineers (IEEE), 2014, p. 3764-3770.
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