PUBLICATIONS
JOURNAL PAPER
Multi-resonant Frequency-locked Loop for Grid Synchronization of Power Converters under Distorted Grid Conditions
Location: USA
Publication date: 2010-04-12
Published in: IEEE Transactions on Industrial Electronics, April 2010
ref. DOI: 10.1109/TIE.2010.2042420
Documents

Local members

Alvaro Luna

PhD. Senior Researcher.

Jose Ignacio Candela

PhD. Senior Researcher. Project Responsible

Ramon Mujal

PhD. Senior Researcher

External members

Teodorescu, R., Blaabjerg, F.

 

Abstract

This paper presents a new multiresonant frequency-adaptive synchronization method for grid-connected power converters that allows estimating not only the positive- and negative-sequence components of the power signal at the fundamental frequency but also other sequence components at other harmonic frequencies. The proposed system is called MSOGI-FLL since it is based on both a harmonic decoupling network consisting of multiple second-order generalized integrators (MSOGIs) and a frequency-locked loop (FLL), which makes the system frequencyadaptive. In this paper, the MSOGI-FLL is analyzed for single- and three-phase applications, deducing some key expressions regarding its stability and tuning. Moreover, the performance of the MSOGI-FLL is evaluated by both simulations and experiments to show its capability for detecting different harmonic components in a highly polluted grid scenario.
 

Associated projects

National public