• N.Saibhavani
• P.Madhavi

In this paper proposes a single-phase seven-level inverter for grid-connected photovoltaic systems, with a completely unique pulse width-modulated (PWM) control scheme. Three reference signals that are just like one another with an offset that's like the amplitude of the triangular carrier signal were wont to generate the PWM signals. The inverter is capable of manufacturing seven levels of output-voltage levels (Vdc, 2Vdc/3, Vdc/3, 0 ,−Vdc,−2Vdc/3,−Vdc/3) from the dc supply voltage. The photovoltaic (PV) energy is presented together of the foremost promising source of unpolluted energy, then an honest way for greenhouse emission emissions mitigation and reduce the fuel dependence. Within it, the photovoltaic energy has caused an enormous interest within the electronic converters, and therefore the got to improve their efficiency and reducing their cost. With this work I present an answer for a module scale grid-connected single-phase inverter. the answer consists during a two-stage inverter insolated with a grid line transformer. To the boost control it's implemented a Maximum point Tracking algorithm which will optimize the facility extraction from the PV source and for the inverter it's used a sliding mode hysteretic control.

Inverters, Photovoltaic, Power Electronics, Renewable Energies, Grid connected, modulation index, multilevel inverter, pulse width-modulated (PWM).

"Modified Single-Phase Seven-Level Grid-Connected Inverter for Photovoltaic System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 9, page no.e721-e729, September 2021, Available :http://www.jetir.org/papers/JETIR2109486.pdf

"Modified Single-Phase Seven-Level Grid-Connected Inverter for Photovoltaic System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 9, page no. ppe721-e729, September 2021, Available at : http://www.jetir.org/papers/JETIR2109486.pdf