Hybrid Model Predictive SHM Control for Zero CMV in Three-Phase Five-/Nine-Level Packed E-Cell Inverter

Abstract

This article proposes a hybrid model predictive selective harmonic mitigation (SHM) to design a multiobjective switching control where zero common mode voltage (CMV), harmonic distortion mitigation, capacitor voltage balancing, and switching voltage-level operation are aimed in three-phase packed E-cell (PEC) inverter. SHM is developed for low frequency five-/nine-level voltages to improve power quality and achieve zero CMV. Afterward, SHM is hybridized with model predictive control (MPC) to select switching states in an online procedure and then actively balance PEC capacitor voltages. Due to MPC-based implementation of SHM, the switching voltage-level is acquired where both five-/nine-level voltages can be generated in three-phase PEC inverter to demonstrate its capability in dealing with faulty switch conditions. Hybrid model predictive SHM switching control is proven through both hardware-in-the-loop (HIL) using OPAL-RT simulator and experimental implementation using DS1202 and the results illustrate that all targeted objectives are attained for low frequency five-/nine-level three-phase PEC inverter.