Overview
ABSTRACT
This article focuses on the contribution of new digital solutions for the modern control of power converters. For this purpose, the digital solutions are classified into three families. The first one includes software digital solutions such as microcontrollers or DSPs (Digital Signal Processors). The second one includes hardware solutions such as FPGAs (Field Programmable Gate Arrays) or ASICs (Application Specific Integrated Circuits). The third family includes hybrid digital solutions that combine software and hardware digital solutions. The features and drawbacks of each digital solution are presented and discussed. The design methods associated with these digital solutions and dedicated to the digital implementation of power converter control algorithms are also presented and detailed.
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Read the articleAUTHORS
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Meriem MERAI: Doctoral student - University of Tunis El Manar, National Engineering School of Tunis, Electrical Systems Laboratory, LR11ES15, Tunis, Tunisia
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Mohamed Wissem NAOUAR: Doctor - Electrical engineer - Maître assistant à l'École nationale d'ingénieurs de Tunis Université de Tunis El Manar, École nationale d'ingénieurs de Tunis, Laboratoire de systèmes électriques, LR11ES15, Tunis, Tunisia
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Eric MONMASSON: Professeur des universités Université de Cergy Pontoise, Laboratoire SATIE-IUP GEII, Cergy-Pontoise, France
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Ilhem SLAMA-BELKHODJA: University Professor University of Tunis El Manar, National Engineering School of Tunis, Electrical Systems Laboratory, LR11ES15, Tunis, Tunisia
INTRODUCTION
Power electronics converters are commonly used in a variety of applications to control and manage the flow of electrical energy . These applications include electric vehicles, electric traction, "more electric" aircraft and microgrids integrating distributed generation based on renewable energy systems (wind, photovoltaic, biomass generators, etc.). In all these applications, converters play a vital role, since they enable electrical energy to be transformed from one form to another, while controlling its direction and characteristics.
The main challenges of modern power electronics converter controls can be summarized as follows:
efficient management of electrical energy flow and its characteristics (voltage and current waveforms, power factor, harmonic distortion rate (TDH), etc.);
cost reduction ;
operating reliability (fault tolerance and continuity of service) ;
control accuracy (the system responds accurately to reference setpoints) ;
the possibility of adding auxiliary functions in addition to basic control functions in order to contribute to power grid support .
Responding effectively to these constraints and challenges depends essentially on :
the algorithmic content implemented ;
the calculation and integration capabilities of the digital target used;
the accuracy of the measurements supplied by the power/control interface, particularly in relation to the full scale of the A/D converters used.
Thus, the solution used...
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KEYWORDS
digital control | power converter | microgrid | FPGA | microcontroller
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Conversion of electrical energy
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Digital control of power electronics converters
Digital control constraints for power electronics converters
Bibliography
Websites
Development tools for embedded processors based on SPARC architecture http://www.gaisler.com/index.php
Hardware description language http://www.opencores.org/projects
Hybrid digital solutions
Microsemi...
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