Grid interconnection of renewable energy sources based on advanced multi-level inverter

This paper introduces an advanced application for the T-type five-level inverter (T5). The T5 will be used in this work to inject power generated from renewable energy sources (RESs) to the utility grid. An enhanced space vector PWM (SVPWM) algorithm is used as the modulation technique of this inverter. A closed loop power control is implemented to deliver the required reference voltages for SVPWM algorithm in order to control the inverter power flow at AC side. The T5 and its control system are demonstrated, analyzed and discussed with extensive MATLAB/Simulink simulation studies to evaluate the inverter output power. The results show that the proposed inverter has a significant improvement in the quality of the injected power to the grid which makes it a good candidate for the grid interconnection applications.