Investigation of an Atypical Sixth Harmonic Current Level of a 5 MW Wind Turbine Configuration

Author

Schostan, Steffen ; Dettmann, Klaus-D ; Schulz, Detlef ; Plotkin, Juriy

Author_Institution

Helmut-Schmidt Univ. Hamburg, Hamburg

fYear

2007

fDate

9-12 Sept. 2007

Firstpage

2529

Lastpage

2535

Abstract

Current harmonic production of a 5 MW offshore wind turbine prototype is investigated on an onshore test site. On the PCC an atypical high level of the sixth harmonic current was measured. The evaluation of the existing configuration for future extensions with other wind turbines requires the investigation of this effect. Therefore the existing technical structure with medium voltage cable connection and parallel double-tuned harmonic filter is analyzed. The sixth harmonic generation through asymmetrical loads is shortly introduced. It is shown, that the reason for the high level of sixth current harmonic is not a series-resonance, but an undesired additional effect caused by the double-tuned filter, which damps the uneven harmonics. Measurements confirm the theoretical approach.

Keywords

electric current measurement; power cables; power harmonic filters; power system harmonics; wind power plants; wind turbines; asymmetrical load; medium voltage cable connection; offshore wind turbine; parallel double-tuned harmonic filter; power 5 MW; sixth harmonic current measurement; Current measurement; Frequency conversion; Harmonic analysis; Harmonic filters; Medium voltage; Power harmonic filters; Production; Prototypes; Testing; Wind turbines; Circuit analysis; Current measurement; Harmonic analysis; Harmonic distortion; Passive filter; Power Quality; Power system measurements; Sequences; Wind energy; Wind power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

EUROCON, 2007. The International Conference on "Computer as a Tool"

Conference_Location

Warsaw

Print_ISBN

978-1-4244-0813-9

Electronic_ISBN

978-1-4244-0813-9

Type

conf

DOI

10.1109/EURCON.2007.4400516

Filename

4400516