Abstract—In this paper, seven level inverter with single DC source interconnected Photovoltaic System (PV) is presented. The proposed system, mainly focuses on designing an efficient topology for MLI with reduced number of electronic components, improve the harmonic performance and reduce the Total Harmonic Sistortion (THD) level. A seven level inverter (+3Vdc, 2Vdc, +Vdc, 0, -Vdc, -2Vdc and -3Vdc) withsingle dc source and reduced switching power losses has been designed.Capacitor voltage balancing DC-DC isolation converter has been used to handle the dynamic varying conditions (Temperature, Irradiation) of the PV panel.A single reference multicarrier Sine Pulse Width Modulation (SPWM) with commutation logics has been used to control the bidirectional switches and Zero Cross Detector (ZCD) has been used to control the H-bridge inverter. The performance (with/without filter) of this approach based on the THD has beensimulated in MATLAB/Simulink software and developed a prototype experimental results are presented.

Index Terms—Multilevel inverter, Photovoltaic systems, PI controller, DC-DC isolation converter

Cite: R Kumaresan and I Gnanambal, "SEVEN LEVEL INVERTER WITH SINGLE DC SOURCE INTERCONNECTED PHOTOVOLTAIC SYSTEM," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 5, No. 2, pp. 1-15, April 2016.