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This paper proposes transformer-less dual hybrid topologies suitable for rectifier type load. Performance of the reduced switch version of the network is highlighted. It consists of two inverters, one operates at a lower frequency (typically around 550 Hz) and the other operates at higher frequency (around 20 kHz). Less number of switches is used to improve reliability and reduce cost. The low frequency...
In this paper, the three-phase four-wire active power filter based on a three-level neutral-point-clamped inverter is presented. The proposed active power filter and controller eliminate harmonics in all three phases as well as the neutral current. The existing neutral-point-clamped inverter for a three-phase three-wire system is used for the three-phase four-wire system since the split DC capacitors...
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