A Stationary Reference Frame Grid Synchronization System for Three-Phase Grid-Connected Power Converters Under Adverse Grid Conditions

Grid synchronization algorithms are of great importance in the control of grid-connected power converters, as fast and accurate detection of the grid voltage parameters is crucial in order to implement stable control strategies under generic grid conditions. This paper presents a new grid synchroniz...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2012-01, Vol.27 (1), p.99-112
Main Authors: Rodríguez, Pedro, Luna, A., Muñoz-Aguilar, Raúl Santiago, Etxeberria-Otadui, I., Teodorescu, R., Blaabjerg, F.
Format: Article
Language:English
Subjects:
Adaptive filters
Adaptive filters (AFs)
Algorithms
Applied sciences
Circuit properties
Circuits of signal characteristics conditioning (including delay circuits)
Convertidors de corrent elèctric
Distortion
Distribució
Electric current converters
Electric potential
Electric power
Electric power distribution
electric variables measurements
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical equipment
Electrical machines
Electronic circuits
Electronics
Electrònica de potència
Energia elèctrica
Enginyeria electrònica
Exact sciences and technology
Filtres adaptatius
Frequencies
Frequency estimation
Frequency locked loops
Frequency synchronization
frequency-locked loops (FLLs)
monitoring
Phase locked loops
Power converters
Power electronics, power supplies
Regulation and control
renewables
Signal convertors
Simulation
smart grid
Strategy
Synchronism
Synchronization
Voltage
Voltage control
Àrees temàtiques de la UPC
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Description
Summary:Grid synchronization algorithms are of great importance in the control of grid-connected power converters, as fast and accurate detection of the grid voltage parameters is crucial in order to implement stable control strategies under generic grid conditions. This paper presents a new grid synchronization method for three-phase three-wire networks, namely dual second-order generalized integrator (SOGI) frequency-locked loop. The method is based on two adaptive filters, implemented by using a SOGI on the stationary αβ reference frame, and it is able to perform an excellent estimation of the instantaneous symmetrical components of the grid voltage under unbalanced and distorted grid conditions. This paper analyzes the performance of the proposed synchronization method including different design issues. Moreover, the behavior of the method for synchronizing with highly unbalanced grid is proven by means of simulation and experimental results, demonstrating its excellent performance.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2011.2159242