• Ch Sabitha
• J Suresh
• D Sai Prasanthi
• P Phani

The transformer-less inverter (TLI) is becoming more popular for use in photovoltaic (PV) systems due to its small size and excellent efficiency. The traditional PV inverter system's cumbersome and heavy transformer may be eliminated, allowing for a smaller TLI. The loss of isolation is the end consequence, as inverters link PV directly to the grid. Leakage current is caused by the direct connection, which causes the common mode voltage (CMV) to vary while the inverter is operating. In order to achieve a five-level output voltage, this article details a two-stage TLI setup. In order to give an inverter quadratic boost output for multilayer output voltage, the front end employs two inductors & two capacitors. Leakage current can be reduced with the use of a common ground configuration (CGC). To regulate the inverter, one uses level-shifted pulse width modulation, or LS-PWM. In addition, before choosing the power components, we examine the inverter's current and voltage stress for each switch. Both the MATLAB/Simulink environment and laboratory experiments are used to verify the TLI.

Transformerless Inverter, Photovoltaic, Common Mode voltage, Leakage current, Common ground configuration, LS-PWM

"A Quadratic Boost Two-Stage Transformerless Inverter for Single Phase Photovoltaic Applications ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 4, page no.i170-i178, April-2024, Available :http://www.jetir.org/papers/JETIR2404821.pdf

"A Quadratic Boost Two-Stage Transformerless Inverter for Single Phase Photovoltaic Applications ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 4, page no. ppi170-i178, April-2024, Available at : http://www.jetir.org/papers/JETIR2404821.pdf