A Modular Approach for Integrating Harmonic Cancellation in a Multi-cell based UPQC
Javier Muñoz, Alumno de Doctorado de Ingeniería Eléctrica del D.I.E., nos presentará sus avances en su tesis, el Jueves 6 de Diciembre a las 16:00 hrs, en las dependencias de nuestro laboratorio.
This work presents a three-phase Unified Power Quality Conditioner (UPQC) based on two
kinds of power cells. Differently to topologies based on symmetrical units, the proposed
topology is assembled using one type of single-phase power cells for compensating
disturbances at the fundamental frequency and another type for compensating harmonic
currents. This feature allows the implementation of the power cells with different types of
semiconductors, so the cells that compensate at the fundamental frequency can use slower
semiconductors but with higher voltage/current ratings and the power cells that
compensate harmonics can use faster semiconductors but with lower voltage/current
ratings. In addition, as the control objectives of the two types of cells are different, two
control schemes are designed to operate independently. Particularly, power cells for
harmonic compensation can dynamically adjust its own DC voltage to follow the load
conditions in order to operate with maximum efficiency. Simulated preliminary results
confirm the theoretical considerations.