Adaptive Observer-Based Grid-Synchronization and Sequence Extraction Techniques for Renewable Energy Systems: A Comparative Analysis

Various faults and disturbances often make the grid unbalanced distorted. To grid-connected converters resilient to distorted grid, real-time estimation of voltage sequences are essential. Adaptive-observer based grid-synchronization techniques very suitable for this purpose. In paper, a comparative analysis three recently proposed adaptive observer-based technique presented frequency sequence extraction. The considered are: global observer, gain normalized second-order generalized integrator type observer. Following fair systematic tuning process, performances verified through extensive numerical simulation experiments. Experimental results demonstrate merits demerits individual techniques. Academic researchers industrial practitioners will find useful selection extraction