Losses analysis in power semiconductor devices of a Single-Phase Active Multi-level Rectifier with voltage sag ride-through capability

In recent years, the use of active rectifiers has become common to correct problems as low power factor and harmonics in the AC mains, besides it can compensate the DC bus before load changes. Some of these rectifiers are also able to compensate voltage sags. Power losses studies have been developed for this kind of topologies; however, the behavior of these is not mentioned under voltage sags conditions. In this paper, a power losses analysis of semiconductor devices of a single-phase active multi-level rectifier is presented, which takes into account the behavior of its variables in function of AC voltage, considering voltage sags. This above mentioned is carried out by means of mathematical analysis of the topology and simulations and validated by experimental tests in a 1 kVA prototype.