• Bammidi Naga sai Prakash
• Jayanth Dasamantharao

This paper reports the modelling of off-grid inverter for small standalone system of single-phase applications. This off grid inverter consists of a high frequency DC-DC step up converter cascaded with a full bridge PI control voltage source inverter using SPWM modulation with LC filter to produce AC sine wave output. This off-grid inverter model is capable to produce AC sine wave output voltage at 230 V 50 Hz up to 1 kW power from a 48 V DC battery source. The AC sine wave output waveform achieved a voltage Total Harmonic Distortion (THD) of less than 1 % which is almost a pure sine wave. The conversion efficiency performance of the off-grid inverter achieved more than 94 %. The performance of the model is validated by real commercial off-grid inverter. The performance validation experiment shows that the off-grid inverter Simulink model conversion efficiency and THD performance are comparable to the commercial off-grid inverter. This model contributes to assist small to medium standalone system load.

Total harmonic distribution, LC filter, Pulse width modulation

"MODELLING OF SINGLE-PHASE OFF GRID INVERTER FOR SMALL STANDALONE SYSTEMS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 11, page no.f39-f45, November-2023, Available :http://www.jetir.org/papers/JETIR2311505.pdf

"MODELLING OF SINGLE-PHASE OFF GRID INVERTER FOR SMALL STANDALONE SYSTEMS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 11, page no. ppf39-f45, November-2023, Available at : http://www.jetir.org/papers/JETIR2311505.pdf