Model Predictive Control-Based Dual Input Split Source Inverter for PV Applications

Abstract

Robust and efficient integration of photovoltaic (PV) sources is essential for enhancing the domination of renewable sources and promoting energy transition. Recently, impedance source inverters have attracted wide interest. However, they need a high number of passive components. Thence, lower efficiency, higher cost, and bulky volume are the main drawbacks of conventional impedance source inverters. The split source-based PV inverters (SSI) have presented lower components and smaller volume candidates in these applications. Therefore, this paper presents a modified dual-input-based SSI for PV inverters. Moreover, an improved finite control set (FCS) model predictive control (MPC) method is proposed for controlling the multi-inputted PV power with their expected shading conditions. The proposed FCS-MPC also injects high quality AC current/power to the utility grid side. The proposed dual input topology and FCS-MPC are verified experimentally. The superiority of input in addition to output sides waveform qualities has been proven.