Model Predictive Control of 3-Level T-Type Converter for Grid-Tie Application

Abstract

—A finite control set model predictive control of 3 Level T-type converter for grid tie application, with decoupled active and reactive power control with addition to dc link voltage balancing has been investigated and presented in this project. Also, one notable constraint associated with employing MPC is the variable switching frequency. This challenge can be mitigated by comparing the switching states with a carrier wave of constant frequency. Nevertheless, fine-tuning the weighting factors poses a formidable challenge, particularly as and when count of constraint to be included in designing of a cost-function rises. Consequently, in this proposed approach, the complexity of this tuning process is mitigated by adopting a MCDM technique, specifically VIKOR. Through simulation, the suggested predictive control algorithm is verified and demonstrates the ability to track and regulate the input unity power factor