PUC5 and MPUC5 Based Shunt Active Power Filters

Abstract

This paper studies five-level packed U-cells (PUC5) and its modified version (MPUC5), both operating as shunt active power filters. These topologies generate multilevel voltages allowing filter impedance reduction, and compensate harmonic and reactive power helping to meet IEEE standards. They are compared with cascaded H-bridges in terms of number of components, quality waveforms, and stress and losses on power switches. Besides that, sensorless voltage control is presented for PUC5 topology, PWM and control strategies, simulation and experimental results are also presented.