A Comparative Performance Study of Advanced PLLs for Grid Synchronization

The interfacing of renewable energy sources (RESs) into power system through power electronic converters is being increased in microgrid. The control and integration of RESs require an accurate fundamental frequency positive sequence (FFPS) component extraction methods to enhance the disturbance rejection capability of SRF-PLL for various grid conditions. The extraction of FFPS components based on second order generalized integrator (SOGI), cascaded delayed signal cancellation (CDSC) and multiple delayed signal cancellation (MDSC) PLLs are reviewed and their extraction accuracy is evaluated for various grid conditions based on the quality of frequency in SRF-PLL. The performance comparison of these PLLs is presented based on the MATLAB simulation results.