Hardware-in-the-loop FPGA-based real-time simulation of cascaded H-bridge multilevel inverter for grid interactive photovoltaic power plant

摘要

Requirements, for better power control and rapid devices in the field of power converters, have created many topological and control methods for power electronics. Renowned of them are the multilevel inverters topologies, who are broadly utilized as a part of high-power high-voltage applications because of their worthwhile execution contrasted with two-level inverters. The focal purpose of this paper is to evolve a control method for a 3-phase multilevel cascaded H-bridge photovoltaic (PV) inverter connected to the grid utility system with an LCL filter design using Space Vector Modulation (SVPWM) scheme. The control of the system (inverter-LCL filter) grid-connected is studied thru conventional direct-current d-q vector control strategy. Simulation results, in the SimPowerSystem / Matlab environment, demonstrate that the proposed control strategy can extend robust stability for system after changing reference parameters. An FPGA in the loop implementation of the suggested algorithm to create the switching sequences, is introduced for approval this algorithm in real time application.