DocumentCode :
1993541
Title :
Decoupled Double Synchronous Reference Frame current controller for unbalanced grid voltage conditions
Author :
Reyes, Manuel ; Rodríguez, Pedro ; Vázquez, Sergio ; Luna, Alvaro ; Carrasco, Juan Manuel ; Teodorescu, Remus
Author_Institution :
Abengoa Res., Seville, Spain
fYear :
2012
fDate :
15-20 Sept. 2012
Firstpage :
4676
Lastpage :
4682
Abstract :
Due to the growing changes in the electrical network related to the new distributed generation scheme and the integration of renewable energy sources, new requirements for grid-connected power converters are being defined in the new grid codes. The injection of positive- and negative-sequence current components is becoming necessary for achieving new capabilities like the reactive power injection during a grid fault. This paper deals with a fundamental issue in this topic, i.e., the performance of the current controller. Classical dq controllers, which are extensively used in industrial applications, degrade its performance when both sequences are involved, as unavoidable oscillations in the dq axes appear. In this paper, a new scheme for controlling positive- and negative-sequence currents using dq controllers is proposed, based on an enhanced Double Synchronous Reference Frame (DSRF) controller. In this paper the DSRF controller is improved by adding a decoupling network which counteracts the oscillations caused by the presence of both sequences. Experimental results will demonstrate the validity of the proposed Decoupled DSRF (DDSRF) controller.
Keywords :
distributed power generation; electric current control; fault diagnosis; power grids; renewable energy sources; DDSRF controller; decoupled double synchronous reference frame current controller; distributed generation scheme; dq controllers; electrical network; grid codes; grid fault; grid-connected power converters; industrial applications; negative-sequence current components; positive-sequence current components; reactive power injection; renewable energy sources; unbalanced grid voltage conditions; Couplings; Current measurement; Inductors; Oscillators; Reactive power; Synchronization; Voltage fluctuations;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2012 IEEE
Conference_Location :
Raleigh, NC
Print_ISBN :
978-1-4673-0802-1
Electronic_ISBN :
978-1-4673-0801-4
Type :
conf
DOI :
10.1109/ECCE.2012.6342184
Filename :
6342184
Link To Document :
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