Benchmarking of phase lock loop based synchronization algorithms for grid-tied inverter

• Main Authors: Filipović Filip, Banković Bojan, Petronijević Milutin, Mitrović Nebojša, Kostić Vojkan
• Format: Article
• Language: English
• Published: Faculty of Technical Sciences in Cacak 2019-01-01
• Series: Serbian Journal of Electrical Engineering
• Subjects: benchmarking; grid synchronization; phase locked loop; grid disturbance
• Online Access: http://www.doiserbia.nb.rs/img/doi/1451-4869/2019/1451-48691901001F.pdf

In renewable energy-based generation sources a phase locked loop is one of the most popular synchronization techniques. A rapid and precise grid voltage phase and frequency estimation under a wide spectrum of possible grid disturbances is its main objective. This paper compares popular grid synchronization algorithms on grid voltage anomalies. The compared algorithms are divided in three groups: without filtering, with filtering in synchronous reference frame and with filtering in stationary reference frame. The behaviour of the algorithms is tested in a laboratory, using dSpace 1103 as a platform on which the algorithms are compiled and OMICRON CMC 356 as a programmable grid voltage generator. The benchmarks conducted in this paper include voltage sags, grid voltages harmonics, DC offset and frequency step change. The obtained results show that there are significant differences in tested PLL responses for some networks disturbances. [Projects of the Serbian Ministry of Education, Science and Technological Development, Grant no. III 44004 and Grant no. III 44006]