This paper concerns with the analysis and calculation of the low-frequency DC-link input current and voltage ripple harmonic components in three-phase three-level flying capacitor inverter topologies. As a first simplified approach, reference is made to sinusoidal carrier-based PWM, and sinusoidal load currents with unity power factor, well representing most of the grid-connected applications. The proposed method can be straight-forwardly extended to centered PWM with any output power factor angle. Based on the ripple requirements of DC-link voltage, an original simple and effective equation for designing the DC-link capacitor has been proposed, since design guidelines only for the flying capacitors are reported in literature. Numerical simulations have been carried out by Matlab/Simulnik in order to verify the proposed developments.
Dc-link current and voltage ripple harmonics in three-phase three-level flying capacitor inverters with sinusoidal carrier-based PWM / Hammami, M.; Vujacic, M.; Grandi, G.. - ELETTRONICO. - 2018:(2018), pp. 664-669. (Intervento presentato al convegno 19th IEEE International Conference on Industrial Technology, ICIT 2018 tenutosi a Lyon Congress Center, Francia nel 2018) [10.1109/ICIT.2018.8352257].
Dc-link current and voltage ripple harmonics in three-phase three-level flying capacitor inverters with sinusoidal carrier-based PWM
Hammami, M.;Vujacic, M.;Grandi, G.
2018
Abstract
This paper concerns with the analysis and calculation of the low-frequency DC-link input current and voltage ripple harmonic components in three-phase three-level flying capacitor inverter topologies. As a first simplified approach, reference is made to sinusoidal carrier-based PWM, and sinusoidal load currents with unity power factor, well representing most of the grid-connected applications. The proposed method can be straight-forwardly extended to centered PWM with any output power factor angle. Based on the ripple requirements of DC-link voltage, an original simple and effective equation for designing the DC-link capacitor has been proposed, since design guidelines only for the flying capacitors are reported in literature. Numerical simulations have been carried out by Matlab/Simulnik in order to verify the proposed developments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.