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

fYear

2007

fDate

2-5 Sept. 2007

Firstpage

1

Lastpage

10

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/EPE.2007.4417716

Filename

4417716