Title :
Control of back-to-back-connected neutral-point-clamped converters in wind mill applications
Author :
Pou, Josep ; Robles, Eider ; Ceballos, Salvador ; Zaragoza, Jordi ; Arias, Antoni ; Ibanez, Pedro
Author_Institution :
ROBOTIKER-TECNALIA Technologic Corp., Bizkaia
Abstract :
This paper analyzes back-to-back-connected neutral-point-clamped converters in wind turbine applications. A control strategy for the grid-connected converter is proposed that is able to operate under unfavorable voltage conditions. The positive-sequence voltage detector is able to provide an accurate position of the grid voltage vector so that the controller is always synchronized. The wind generator, which is a permanent magnet machine with an external rotor, operates properly throughout a voltage-dip process. The task of balancing voltages on the dc-link capacitors of the back-to-back connection is performed by the modulation strategies. Simulation and experimental results are provided.
Keywords :
permanent magnet generators; power convertors; power generation control; synchronous generators; voltage control; wind turbines; converter control; grid voltage vector; neutral-point-clamped converters; permanent magnet machines; positive-sequence voltage detector; synchronous generators; wind generator; wind mills; wind turbines; Capacitors; Control systems; Detectors; Electronic mail; Milling machines; Topology; Uniform resource locators; Voltage control; Wind energy; Wind turbines; Converter control; Modulation strategy; Multilevel converters; Renewable energy systems; Three-phase system; Wind energy;
Conference_Titel :
Power Electronics and Applications, 2007 European Conference on
Conference_Location :
Aalborg
Print_ISBN :
978-92-75815-10-8
Electronic_ISBN :
978-92-75815-10-8
DOI :
10.1109/EPE.2007.4417716
