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This paper proposes the use of a high power density ac-dc converter to provide higher efficiency and a tight dc bus for connection of electronic loads as well as renewable energy sources. As a new contribution, the authors present a novel hybrid rectifier structure with a series dc-link voltage compensation technique. The proposed hybrid solution is characterized by the fact that a three-phase Boost...
This paper presents the preliminary results concerning the development of a multistring solar inverter system for dc microgrids. The proposed system is composed of two dc-dc converters as the dc input stage and an ac grid-tied bi-directional full-bridge inverter. Each input dc-dc converter operates with independent MPPT algorithms which are capable of extracting the maximum power even under shading...
This paper presents the development of a single-phase online Uninterruptable Power Supply (UPS) system using a HPF front-end Boost converter with integrated Power Factor Correction (PFC) and DC-DC functions and an ordinary Full-Bridge as the single-phase output inverter. Besides the front-end stage with integrated PFC and DC-DC functions, the main feature of the proposed solution is the use a Proton...
The trend for the development of more electric systems for aircrafts, microgrids, and industrial processes has been leading to the need of more efficient and reliable electronic converters. In this scenario, one can highlight the necessity of high power density rectifiers for reducing current harmonics and providing a stabilized intermediate dc-link for connection of electronic loads. Therefore, in...
The main cause of ultimately arrest in automated systems, which use adjustable speed drives (ASDs), are temporary voltage sags. Based in this context, this paper presents an analysis of a hybrid three-phase rectifier developed for power factor correction and to promote voltage sag ride-through capability to ASDs. In order to prove the effectiveness of the proposed solution, this paper also presents...
Due to the considerable increase of electronic power processing devices in various segments of industry it becomes necessary to control and limit the current harmonic content injected into the distribution systems through the development of pre-regulator converters. In this context, this paper presents the development and experimental analysis of a new structure of single-phase hybrid rectifier with...
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