Control of Power Electronics Systems: Selected examples
Speaker:Prof. J. Fernando A. Silva
Department of Electrical and Computer Engineering
Instituto Superior Técnico (IST), Universidade Técnica de Lisboa (UTL), Lisbon, Portugal
Date & Time:14 Jun 2007 (Thursday) 10:00 - 12:00
Venue:Auditorium II, Library, University of Macau

Abstract

The application of modeling methods suitable for control and simulation of power electronic systems is outlined as a self-contained approach to solve the simulation and control problems of existing or novel structures of power electronics converter systems. The non linear modeling in controller design and simulation uses switched state space models avoiding the averaging task, needing few linear control concepts, while deriving the stability study from geometric properties and leading to an integrated design of the control, modulators and simulation tasks. On-line decoupling, sliding mode control or predictive techniques are well suited to power converters as they are inherently variable structure systems. Obtained controllers can be made robust concerning converter parameter variations, semiconductor non ideal characteristics, load and line disturbances. Main modeling and design steps are summarized and examples given, some related to FACTS. Results show fast dynamics, no steady state-errors and robustness against semiconductor and system non idealities.