Advanced Control Technique based Neutral Clamped Inverter Operation

The proposed manuscript deals with an advanced control technique (ACT) based multi-level inverter approach to resolve the power quality (PQ) problems that occurred in the renewable energy system (RES) based microgrid system. A three-level neutral clamped inverter (NCI) is proposed to facilitate the single-stage operation by integrating the solar energy-based RES. In addition to that, an incremental conductance (IC) based MPP algorithm is used to improve the solar system performance by producing maximum voltage and current. The proposed ACT is used to compute the fundamental parameters of the grid current and multiplied with the in-phase unit current component to generate the reference signals for NCI operation. Detailed mathematical modeling of the ACT is presented. To validate the proposed ACT-based NCI approach, the obtained results are compared with the traditional approach results during different test conditions. Keywords- solar system, advanced control technique (ACT), neutral clamped inverter (NCI), maximum power point (MPP), power quality (PQ)Introduction.