Enhanced Frequency Adaptive Demodulation Technique For Grid-Connected Converters

Ahmed, Hafiz and Biricik, Samet and Benbouzid, Mohamed (2020) Enhanced Frequency Adaptive Demodulation Technique For Grid-Connected Converters. IEEE Transactions on Industrial Electronics. ISSN 0278-0046

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Abstract

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

Item Type: Article
Identification Number: https://doi.org/10.1109/TIE.2020.3029485
Date: 13 October 2020
Uncontrolled Keywords: Demodulation, Frequency Estimation, PLL
Subjects: H600 Electronic and Electrical Engineering
Divisions: Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment > Advanced Systems Engineering
Depositing User: Hafiz Ahmed
Date Deposited: 16 Oct 2020 09:45
Last Modified: 16 Oct 2020 09:45
URI: http://www.open-access.bcu.ac.uk/id/eprint/10125

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