DocumentCode :
1116951
Title :
New Optimized PWM VSC Control Structures and Strategies Under Unbalanced Voltage Transients
Author :
Etxeberria-Otadui, Ion ; Viscarret, Unai ; Caballero, Marcelino ; Rufer, Alfred ; Bacha, Seddik
Author_Institution :
IKERLAN-IK4 Technol. Res. Center, Mondragon
Volume :
54
Issue :
5
fYear :
2007
Firstpage :
2902
Lastpage :
2914
Abstract :
Control structures and strategies have a critical influence on a power electronic converter´s behavior during disturbances. Most of the previous works in the field of pulsewidth modulation voltage-source converter (VSC) operation under unbalanced conditions propose dual vector controllers with dc bus voltage optimization strategies, which have been proven to be well adapted for rectifier applications. In this paper, two major contributions are made. On the one hand, a new optimized operation strategy based on exchanged power maximization is proposed for vector control structures, which permits the extension of optimized operation to other VSC applications (e.g., flexible alternating current transmission system and distributed generation interfaces). On the other hand, a scalar control structure is proposed based on resonant controllers, together with three adapted optimized operation strategies, namely: 1) dc bus voltage optimization; 2) power exchange maximization; and 3) a hybrid strategy (an intermediary mode between the other two strategies). Their main advantage is their simplicity and the lack of real-time symmetrical component extraction techniques. This scalar controller and the proposed optimized operation strategies are compared to conventional vector controllers. It is proven through experimental analysis that the proposed scalar controller offers very good performances with simpler structures and bigger flexibility in terms of operation modes.
Keywords :
PWM power convertors; PWM rectifiers; transient analysis; PWM VSC control structures; dc bus voltage optimization strategies; distributed generation interfaces; dual vector controllers; hybrid strategy; power electronic converter; power exchange maximization; power maximization; pulsewidth modulation voltage-source converter; real-time symmetrical component extraction techniques; rectifier applications; resonant controllers; scalar controller; unbalanced voltage transients; Current control; pulsewidth modulation (PWM) converters; voltage sag (dip); voltage unbalance;
fLanguage :
English
Journal_Title :
Industrial Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0046
Type :
jour
DOI :
10.1109/TIE.2007.901373
Filename :
4300923
Link To Document :
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