Shunt Active Power Filter with Three Level Inverter using Hysteresis Current Controllers

Abstract

This document introduces a Shunt Active Power Filter (SAPF) for three-phase three-wire systems, utilizing a Cascaded H Bridge Multilevel Inverter. The Hysteresis Current Control technique provides numerous benefits, including simplicity, minimal current tracking error, and immunity to load parameter variations. The research presented in this paper focuses on a three-level hysteresis band current controller for a three-level Cascaded H Bridge Inverter, specifically applied to SAPF. The proposed scheme effectively utilizes the available voltage states of the three-level inverter to confine the current error within predefined limits. The performance of this method is validated using Powersim (PSIM) software, which demonstrates the effective compensation capability of SAPF with three-level hysteresis band current controllers.