Multiple second order generalized integrators for harmonic synchronization of power converters
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This paper presents a new frequency-adaptive synchronization method for grid-connected power converters which allows estimating not only the positive- and negativesequence components of the power signal at the fundamental frequency, but also other sequence components at multiple frequencies. The proposed system is called the MSOGI-FLL since it is based on a decoupled network consisting of multiple second order generalized integrators (MSOGI) which are frequency-adaptive by using a frequency-locked loop (FLL). In this paper, the MSOGI-FLL is analyzed and its performance is evaluated by both simulations and experiments.
CitacióRodriguez, P. [et al.]. Multiple second order generalized integrators for harmonic synchronization of power converters. A: IEEE Energy Conversion Congress and Exposition. "IEEE Energy Conversion Congress and Exposition 2009". San Jose, California: 2009, p. 2239-2246.