Analysis, comparison and performance evaluation of wind turbine grid synchronizing methods

This paper studies the performance of wind turbine synchronizing methods SRF-PLL, DDSRF-PLL and DSOGI-FLL during three-phase and two-phase grid faults as well as under the presence of grid voltage harmonics. The goal of the study is to investigate how different methods can generate fundamental frequency positive sequence currents to the network under the disturbances. The contribution of the paper contains the comparison of the methods and the analysis of the impacts of tuning parameter selection on the operation of synchronizing methods. The study is carried out using Matlab/Simulink SimPower System using network model which parameters are taken from the real Finnish network.