Advanced Grid Synchronization System for Power Converters under Unbalanced and Distorted Operating Conditions
Location: FRANCE
Publication date: 2006-11-01
Published in: Annual Conference of the IEEE Industrial Electronics Society 2006, Paris (France) - IECON 2006
ref. DOI: 10.1109/IECON.2006.347807

Local members

Alvaro Luna

PhD. Senior Researcher.

External members

Ciobotaru, M. , Teodorescu, R. , Blaabjerg, F.



This paper proposes a new technique for grid synchronization under unbalanced and distortedconditions, i.e., the dual second order generalised integrator - frequency-locked loop (DSOGI-FLL). This grid synchronization system results from the application of the instantaneous symmetrical components method on the stationary and orthogonal alphabeta reference frame. The second order generalized integrator concept (SOGI) is exploited to generate in-quadrature signals used on the alphabeta reference frame. The frequency-adaptive characteristic is achieved by a simple control loop, without using either phase-angles or trigonometric functions. In this paper, the development of the DSOGI-FLL is plainly exposed and hypothesis and conclusions are verified by simulation and experimental results


Associated projects

National public