Abstract: This work introduces a transformer less inverter topology for power quality improvement. The topology can run on batteries or solar power and has the potential to enhance voltage. This inverter refers to a circuit that converts a DC input into AC without the use of an inductor or a transformer. Inverters without transformers are more compact and lightweight. By utilizing high voltage power electronic switches, this topology’s primary goal is to remove inverter losses caused by the use of transformers, which results in a reduction in the inverter system’s size, weight, and cost. Energy losses and additional component expenses are avoided using transformer less inverters, making it more cost- effective. A boost converter stage effectively converts a low voltage DC to a high voltage DC, and an H-bridge stage uses the high voltage DC from the boost converter to flip it into a typical 50 Hz AC. The standard two-level inverter topologies and the high gain DC-DC step-up converter are combined into one circuit. The high efficiency DC to DC boost converter is the key reason to eliminate the bulky transformer, it replaces the role of a traditional step-up transformer. The only losses in this system are those produced by the boost converter and H-bridge inverter, which are negligible when compared to the losses from an iron-core transformer. To improve efficiency and lower costs, the trans-former will be removed as part of this project. This article suggests a way for removing power quality problems caused by nonlinear loads, such as sag and swell. Here, power quality problems are minimized by using the inverter’s output voltage.

Keywords: DC-DC converter; Two-level inverter; Nonlinear load; step-up transformer less inverter

| DOI: 10.17148/IARJSET.2022.9805