Single-Phase to Three-Phase Power Converter with Reduced DC-Link Voltage Ripple and Grid Current Harmonics

This paper presents a single-phase to three-phase converter topologies with the DC link voltage ripple reduction and grid-side current quality improvement with proposed bus clamping pulsewidth modulation control. In this paper, performance of conventional five-leg (5L) converter, four-leg (41) converter and parallel five-leg (P5L) converter are compared. Conventionally, the active front-end converter with sinusoidal pulsewidth modulation (SPWM) scheme and space vector pulsewidth modulation (SVPWM) technique for inverter side control is adopted in such topologies. In these converters, the low frequency voltage oscillation across the de link capacitor is the inherent problem. It is proposed to use advanced bus clamping PWM (ABCPWM) technique for the load side inverter to reduce such ripples. This modulation technique minimizes the dc-link voltage oscillation and also improves the inverter output current and voltage profile in terms of reduced current and voltage THD. The grid current with reduced THD and unity power factor operation for conventional five-leg (5L) converter, four-leg (4L) converter and parallel five-leg (P5L) converter is also presented. The performance comparison of single-phase to three-phase power converter for these topologies with 300 ABCPWM control through simulation are presented.