Hybrid Control of Three-Phase Current Source Rectifiers
Claudio Ramirez, Alumno memorista de la carrera de Ingeniería Civil Electrónica, presentará su avance en su tema de memoria de titulo, el Jueves 29 de Noviembre a las 16:00 hrs, en las dependencias de nuestro laboratorio.
This work presents a hybrid control strategy to regulate with zero steady state error the
active power and the input displacement power factor in a three-phase rectifier.
Particularly, it uses a predictive approach in combination with a linear PI controller. The
predictive portion takes care of the non-linear, multi-variable, and coupled behavior of the
topology. This is possible due to the limited number of valid positions of the switches and
the deterministic model of the structure that allows the representation by means of a
discrete algorithm. However, parameter variations and the ineludible approximations of
the discrete model, makes the overall performance far from being the optimum expected in
both dynamic and static conditions. This justifies the use of an additional linear PI
controller in order to operate with zero steady state error. The resulting system becomes a
hybrid approach and the preliminary results show an easy and robust strategy to be
implemented in a digital system with high overall performance.