Adaptive SOGI Gain Based Control of Single Phase Inverter Under Distorted Grid Condition

Abstract

This paper encompasses a novel harmonic rejection technique in a single phase grid tied inverter. This technique is found to have a better performance in the scenario where the frequency regulation is stringent based on the grid code guidelines. The philosophy involves an adaptive gain $k$ based Second Order Generalised Integrator (SOGI) whose gain gets online updated via Wavelet Transform (WT) technique. Control design for the aforementioned methodology is simulated and validated in MatLab 2018b. Furthermore, the proposed theory is experimentally validated in a 2.3 kW lab scale prototype using a 32 bit C2000 TMS320F28379D Micro Controller Unit (MCU)