Non-Periodic Current Regulation in Digitally Controlled Hysteresis Current Controller
DOI:
https://doi.org/10.22399/ijcesen.3466Keywords:
Current Control, inverters, Hysteresis Band, Sampled frequency, Switching frequency, Current TrackingAbstract
This paper investigates the challenges associated with non-periodic current tracking in digitally controlled Hysteresis Current Controllers (HCC) within grid-connected inverter systems. It examines the dynamic response of the controller when the grid phase undergoes variations, leading to deviations in current tracking. The study explores how phase shifts influence the accuracy of current regulation and their impact on overall system performance. A key aspect of the analysis is the evaluation of total harmonic distortion (THD) in the inverter’s output current, which serves as a critical parameter in assessing grid connection quality and harmonic mitigation.The research employs MATLAB/Simulink simulations environment to analyse the behaviour of the inverter under different grid conditions. The results highlight the difficulties posed by phase variations and their effect on maintaining precise current regulation. Furthermore, the study identifies potential limitations of HCC in ensuring consistent performance under fluctuating grid scenarios. The observed non-periodicity in current tracking suggests the need for controller optimization to enhance synchronization and minimize harmonic distortions. The insights derived from this study contribute to the refinement of digital HCC techniques, aiming to improve inverter efficiency and grid compatibility. By addressing the challenges associated with phase shifts and THD, the findings offer valuable guidance for designing more robust current control strategies in grid-connected applications
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