A carrier-based PWM techniques applied to a three-level four-leg inverter for use as a shunt active power filter

Abstract EN

In order to meet the requirements of harmonic elimination and reactive power compensation in substation, a three level four leg shunt active filter is proposed in this paper.

The use of three-level converters allows a better performance of the equipment, by reducing harmonics and the ripple of the generated voltages and currents.

The compensation algorithm is based on pqr theory.

This scheme requires the service of a phased-locked loop (PLL) to make the system insensitive to the distortions that are generally present in the utility voltages.

The control system is implemented numerically using Matlab / Simulink tool.

The performance of the proposed control approach is finally discussed through the obtained simulation results.