Applied Mathematics & Information Sciences
Abstract
Synchronization algorithms are of great importance in control of grid-connected inverters as an integral part of distributed power generation units such as photovoltaic systems. A new all-digital closed-loop phase-locked algorithm for the synchronization signals of three-phase grid-connected inverters is presented even considering seriously distorted and variable-frequency utility conditions. The proposed synchronization algorithm can suppress the negative sequence utility voltage at fundamental frequency and high-frequency harmonic components effectively, and lock the positive sequence phase at fundamental frequency accurately.Moreover, a frequency adaptation algorithm is also proposed for applications where large frequency variations are often expected. Finally, digital simulation and experimental results both prove the feasibility of the proposed phase-locked method. The introduced synchronization method provides higher degree of immunity and insensitivity to harmonics and other types of pollutions in the utility when used to synchronize inverters.
Suggested Reviewers
N/A
Digital Object Identifier (DOI)
http://dx.doi.org/10.12785/amis/080249
Recommended Citation
Guo, Xiaorui and Guo, Jifeng
(2014)
"A New Synchronization Algorithm for Grid-Connected Inverters,"
Applied Mathematics & Information Sciences: Vol. 08:
Iss.
2, Article 49.
DOI: http://dx.doi.org/10.12785/amis/080249
Available at:
https://digitalcommons.aaru.edu.jo/amis/vol08/iss2/49
