• Mohammmed Asim
• Mirza Mohd Shadab
• Mohd Suhail Khan
• Qamar Alam

The shape of the line current of the conventional converters/ inverters having line commutation is square-shaped in nature which posses harmonics of higher magnitude. Core of the distribution or power transformers became heated due to the presence of harmonics and it also creates Electro Magnetic Interference (EMI). Pulse Width Modulated converters/inverters having MOSFET/IGBT as switching devices contains greater switching losses, low power handling capacity and reliability if it compared to thyristors/ SCR. A thyristor converter/inverters with forced commutated circuit is costly as well as having problems of commutation, is not fit for PWM applications. Converters/inverters having pure sinusoidal output with low harmonics is required for dc-to-ac conversion. A multilevel inverter topology is proposed in this paper, in which 3-phase fully controlled converter is used in inversion mode by controlling the firing angle. This topology has an advantage of having no separate circuit for synchronization due to natural commutation. The proposed model is simulated analyzed initially by connecting an RLE load and later on solar PV array has been used in place of battery. The proposed model is analyzed for different firing angle to reduce the total harmonic distortion (THD).

"Solar PV Based Grid-Tied Multilevel Inverter Topology", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.357-361, June 2019, Available :http://www.jetir.org/papers/JETIR1907P52.pdf

"Solar PV Based Grid-Tied Multilevel Inverter Topology", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp357-361, June 2019, Available at : http://www.jetir.org/papers/JETIR1907P52.pdf