Cascaded Dual Output Multilevel Converter to Enhance Power Delivery and Quality

This paper presents a cascaded dual output multilevel (CDOM) converter to enhance the power delivery and quality. The input ports of the converter can be connected to various DC power sources such as batteries, photovoltaics, fuel cells etc, and two output ports can be connected to different AC power sources such as grid, wind turbine generator, diesel generator etc. These connected AC power sources can operate at a different magnitude, and frequency depending on the application. A mathematical model is developed for the CDOM converter and is used in the finite control set - model predictive control (FCS-MPC) algorithm. The algorithm enables the CDOM converter for active and reactive power control, and grid current harmonic compensation. The performance of the proposed model is validated through MATLAB simulations using non-linear and linear loads connected to the grid. The simulation results show that the converter can control active and reactive power along with grid current harmonic compensation during severe load conditions. Moreover, the quality of the grid current complies with the IEEE-519 standard.