Performance Analysis of SOGI and FADSOGI Based PLLs for Grid Synchronization under Distorted Conditions
Keywords:
Grid synchronization, second-order generalized integrator-based PLLAbstract
For grid-connected systems to operate more effectively, synchronization is crucial. Because of their simplicity of construction and resilience to different grid fluctuations, phase-locked loops, or PLLs, are among the most widely used synchronization techniques. In single-phase systems, grid synchronization in grid-connected power converters is achieved primarily through the use of Second-order generalized integrator (SOGI) based phase-locked loops (PLLs) for improved performance. Because of its straightforward design, specific filtering ability, and frequency adaptability, PLL based on second-order generalized integrators (SOGI-PLL) is utilized. Numerous solutions have been put out in response to the literature's study of SOGI-PLL's sensitivity to lower-order harmonics, swell, and sag. PLLs based on FADSOGI are utilized for the three-phase system. The performance of FADSOGI-PLL is significantly reduced due to the more severe and evident non-linear loop coupling phenomena, particularly in the presence of weak grid and grid frequency changes.Downloads
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Copyright (c) 2025 Sumant Kumar, Anjana Tripathi, Balram Yadav
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