Published Paper Details:

Recent advancements in digital signal processing technology have facilitated the utilization of digital microprocessors for the regulation of grid-connected inverters. Nonetheless, the digital manifestation is hindered by phase lag resulting from temporal delays. This phase lag evaluates the stability and resilience of the inverter controller. This study offers a comprehensive assessment of time-delay compensation methodologies for both model-free and model-based inverter controllers in the context of grid connections. MF methodologies predominantly employ proportional-integral and proportional resonance controllers, alongside various strategies aimed at mitigating time delay. In the interim, this study delineates the control strategies most frequently employed by MB, encompassing the Smith predictor and the modified Smith predictor. A comprehensive summary of various analogous strategies from the literature aimed at minimizing delays is presented, alongside a thorough examination of the notable issues related to the MF and MB procedures. Ultimately, this study presents a hypothesis regarding the most favorable approach at present and suggests a hybrid technique that integrates the MF and MB procedures, thereby offering readers a direction for future inquiry.