Hybrid three-phase rectifiers with active power factor correction: a systematic review

Abstract

The hybrid three-phase rectifiers (HTR) consist of parallel associations of two rectifiers (rectifier 1 and rectifier 2), each one of them with a distinct operation, while the sum of their input currents forms a sinusoidal or multilevel waveform. In general, the rectifier 1 is a GRAETZ (full bridge) (can be combined with a BOOST converter) and the rectifier 2 combined with a DC-DC converter. In this HTR contest, this paper is intended to answer some important questions about those hybrid rectifiers. To obtain the correct answers, the study is conducted as an analysis of a systematic literature review. Thus, a search was carried out in the databases, mostly IEEE and IET, and 34 papers were selected as the best corresponding to the HTR thematic. It is observed that the preferred form of power distribution in a unidirectional hybrid three-phase rectifiers (UHTR) is 〖55%P〗_o (rectifier 1) and 〖45%P〗_o (rectifier 2). For the bidirectional hybrid three-phase rectifiers (BHTR) the rectifier 1 preferably takes 〖90% of P〗_o and 〖10% of P〗_o are processed by rectifier 2. It is also observed that the UHTR that employ the single-ended primary-inductor converter (SEPIC) or VIENNA converter topologies in their rectifier 2, can present sinusoidal input currents with low total harmonic distortion (THD) and high Power Factor (PF), even succeeding to comply with the international standards. The same can be said about the rectifier that employs a pulse-width (PWM) converter of BOOST topology in rectifier 2. In short, the HTR are interesting because they allow to use the GRAETZ full bridge topology in rectifier 1, thus taking advantage of its characteristics, being simple, robust and reliable. At the same time, the advantages of rectifier 2, i.e., high PF and low THD are well used. In addition, this article also points out the future direction of research that is still unexplored in the literature, thus giving opportunities for future innovation.