PROJECT TITLE :
Front-End Converter With Integrated PFC and DC–DC Functions for a Fuel Cell UPS With DSP-Based Control
This paper presents the development of a boost converter with integrated power factor correction (PFC) and dc–dc functions for a proton exchange membrane fuel cell (PEMFC) uninterruptable power offer (UPS). Through the utilization of a passive resonant soft-commutation cell, which besides providing enhancements in potency and reduced electromagnetic interference, produces a naturally controlled supercapacitor charger circuit. Supercapacitors are utilized so as to supply a correct startup of the PEMFC and to improve its dynamic response. The management strategy is implemented employing a digital signal processor and relies on the average current management methodology for sinusoidal input current imposition guaranteeing, so, a high input power issue and low harmonic distortion of current. The most options of the proposed answer are the utilization of a PEMFC as an energy storage system, which replace the battery banks commonly utilized in UPS systems, eliminating the common drawbacks related to operating life and maintenance problems, and the employment of a front-finish converter with integrated PFC and dc–dc functions eliminating the requirement of using an additional and dedicated dc–dc converter for the PEMFC. During power failure or even in conditions of severe voltage sags on the ac mains, the PEMFC is activated assuring the continuous power offer to the electronic load connected to the dc link. During this paper, the authors present the total study description together with experimental results that corroborate with the idea herein presented.
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