Enhanced Frequency Adaptive Demodulation Technique for Grid-Connected Converters

This article presents an enhanced frequency adaptive demodulation technique for grid-synchronization of grid-connected converters in variable condition. Demodulation works by generating demodulated voltages which contain undesired double components. As a result, high-order low-pass filters with high cutoff are required to eliminate the reduces dynamic performance. Frequency enhances performance rejecting components as opposed filtering, however, at cost additional computational complexity. overcomes this problem using without recreating component rejection purposes. complexity significantly. Suitability proposed method is verified through numerical simulation and experimental study. Comparative study existing second-order generalized integrator phase-locked loop techniques demonstrate validity improvement technique.