Multi-Input Split-Source Inverter (MISSI)

Distributed power generation systems can require the interconection of several and independent energy sources demanding different converter topologies. Recently, a range of impedance source converters has emerged, presenting the capability to provide buck-boost feature in a single conversion stage. The split-source inverter (SSI) has been proposed as a new option among impedance source inverters. This topology requires the same number of active switches of the conventional VSI, three additional diodes and the same eight switching states. This paper proposes the multi-input split-source inverters (MISSI). The proposed topology allows the connection of multiple independent sources, without the need for additional active switches. In addition, it is presented a finite set model predictive control (FS-MPC) strategy for the grid connected operation. An optimal switching state is defined by minimizing a proper cost function through a model that predict the future behaviour of the input and output currents. Simulation results are presented to demonstrate the operation of the proposed topology and controller performance.