Seminario Nº140 Design of a Discrete-Time Linear Control Scheme for a Modular UPQC Javier Muñoz, Alumno Tesista del Programa de Doctorado DIE-UDEC, nos presentará sus avances en su tema de investigación el día Viernes 6 de Noviembre a contar de las 17:00 hrs en las dependencias del LCDA. Design of a Discrete-Time Linear Control Scheme for a Modular UPQC
A discrete-time linear control scheme for a multi-level three-phase Unified Power
Quality Conditioner (UPQC) based on Single-Phase Power Cells is presented. The
multi-variable, non-linear, and coupled features of these topologies make the control
strategy design a difficult task. Controlling this kind of systems with mono-variable
linear controllers – as proposed in this work – presents significant advantages
compared with other approaches as simplicity in the design steps due to the large
amount of tools developed for this kind of schemes. Particularly, a classic design
method based on the Root Locus approach is used to choose the controllers
parameters in order to achieve a given dynamical behavior. The proposed control
strategy in this work is intended to be implemented on a DSP based system and thus
its design is carried out on the discrete-time and -frequency domain. Also, due to the
inherent asymmetries among the power cells in a modular topology, a dedicated
individual control strategy is included to ensure a symmetrical distribution of the
power among the power cells. This feature allows the semiconductor devices of each
corresponding module to operate under the same voltage and current ratings. Results
showing transient conditions are shown to probe the feasibility of the control scheme. |