Modeling and Analysis of SOGI-PLL/FLL-Based Synchronization Units: Stability Impacts of Different Frequency-Feedback Paths

• Published in: IEEE transactions on energy conversion Vol. 36; no. 3; pp. 2047 - 2058
• Main Authors: Zhang, Chen, Foyen, Sjur, Suul, Jon Are, Molinas, Marta
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.09.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Analytical models; Converters; Dynamic stability; Feedback; FLL; frequency feedback; Frequency locked loops; Frequency locking; LTP; Mathematical models; Numerical stability; Phase locked loops; Phase locked systems; PLL; Power system stability; Quadratures; SOGI; stability; Stability analysis; Synchronism; Synchronization

Second-order Generalized Integrator (SOGI)-based quadrature-signal-generator (QSG) together with either a phase-locked-loop (PLL) or a frequency-locked-loop (FLL) constitute two types of typical synchronization units (i.e., SOGI-PLL and -FLL) that have been widely used in grid-tied converter systems...