Design of Single-Phase Seven-Level Grid-Connected Inverter using Solar System Saravanan K. K.*, Dr. Stalin N.**, Dr. Raja T. Sree Renga*** *Assistant Professor, University College of Engineering, Panruti, Tamilnadu, India **Assistant Professor, Anna University, BIT Campus, Trichy, Tamilnadu, India ***Associate Professor, Anna University, BIT Campus, Trichy, Tamilnadu, India Online published on 14 October, 2016. Abstract This paper proposes a single phase seven-level inverter for grid-connected photovoltaic system, with a novel pulse width-regulated (PWM) control plan. Three reference signals that are indistinguishable to one another with a balance that is proportionate to the abundancy of the triangular bearer sign were utilized to produce the PWM signals. The inverter is fit for delivering seven levels of output voltage levels (Vdc, 2Vdc/3, Vdc/3, 0, −Vdc, −2Vdc/3, −Vdc/3) from the dc supply voltage. A computerized proportional-integral current-control calculation was executed in a TMS320F2812 DSP to keep the current infused into the grid sinusoidal. The proposed system was confirmed through simulation and implemented in a prototype. Top Keywords Modulation index, Multilevel inverter, Photovoltaic (PV) system, Pulse width-modulated (PWM), Total harmonic distortion (THD). Top |