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A THREE-PHASE MULTILEVEL HYBRID SWITCHEDCAPACITOR PWM PFC RECTIFIER FOR HIGH-VOLTAGEGAIN APPLICATIONS ABSTRACT In this paper, a three-phase multilevel power factor correction rectifier using the hybrid switched-capacitor concept is proposed. The converter is suitable for high-voltage-gain applications from conventional three-phase low-voltage sources. The three-level voltage operation reduces the weight and bulk of the magnetic devices. The main advantages of the proposed converter are low number of active switches, high voltage gain, sinusoidal currents, low voltage stress across all components, and simple control. Both steady-state and dynamic analyses are investigated. Experimental results for a 7500-W/220-V-to-1600-V laboratory prototype with maximum efficiency of 97.78% are presented and discussed. In order to increase the ac current quality, three-level pulse width modulation (PWM) rectifiers have become an interesting alternative to three-phase applications [8]–[13]. They feature high performance for power factor correction (PFC) operation, high efficiency, and high power density. On the other hand, these converters are suitable for low dc-link voltage (lower than 1000 V). To higher dc-link voltages, converters with four and five levels are more attractive [14], [15]. However, the number of active switches and voltage sensors is increased substantially, raising the cost and complexity of the system. Head office: 2nd floor, Solitaire plaza, beside Image Hospital, Ameerpet, Hyderabad www.kresttechnology.com, E-Mail: [email protected] , Ph: 9885112363 / 040 44433434 1 BLOCK DIAGRAM FOR PROPOSED SYSTEM Fig. 1. Proposed high-gain three-phase multilevel hybrid switched-capacitor PWM PFC rectifier DESIGNG SOFTWARE AND TOOLS: MAT LAB /SIMULATION Software and sim power systems tools are used. Mainly control system tools, power electronics and electrical elements tools are used. Head office: 2nd floor, Solitaire plaza, beside Image Hospital, Ameerpet, Hyderabad www.kresttechnology.com, E-Mail: [email protected] , Ph: 9885112363 / 040 44433434 2