Wind turbine harmonics caused by unbalanced grid currents

• Autorzy: Dettmann K. D. , Schostan S. , Schulz D.
• Języki publikacji: EN

Abstrakty

EN

For wind turbines that feed into public grids limits for voltage and current harmonics must be assured. To verify that the actual levels are valid, measurements are necessary. Problems can occur to determine which part of these harmonics has its origin in the wind turbine. It is shown that also harmonics which originally have zero sequences can be transferred over a delta-star-transformer, if the currents of the wind turbine are asymmetric due to unbalanced loads. Measurements in an existing wind turbine configuration are discussed, which confirm the described effects.

Słowa kluczowe

EN

AC machines; circuit analysis; current measurement; harmonic analysis; harmonic distortion; power system harmonics; power system measurements; sequences; wind energy; wind power generation

• Wydawca: AGH University of Science and Technology ; Lodz University of Technology
• Czasopismo: Electrical Power Quality and Utilisation. Journal
• Rocznik: 2007
• Tom: Vol. 13, nr 2
• Strony: 17--23
• Opis fizyczny: Bibliogr. 6 poz.

Twórcy

autor

Dettmann K. D.

autor

Schostan S.

autor

Schulz D.

• Electrical Power Systems Helmut-Schmidt-University Holstenhofweg 85, 22043 Hamburg Germany,

Bibliografia

• 1. EN 50160, Voltage Characteristics of electricity supplied by public distribution systems, March 2000
• 2. IEC 61000-3-4, 1998, Electromagnetic compatibility Part 3-4: Limitation of emission of harmonic currents in low-voltage power supply systems for equipment with rated current greater than 16 A
• 3. VDE 0838-2, 2006, Elektromagnetische Verträglichkeit (EMV) Teil 3-2: Grenzwerte – Grenzwerte für Oberschwingungsströme (Geräte-Eingangsstrom ≤16 A je Leiter)
• 4. IEC 61000-3-2, 2005, Electromagnetic compatibility Part 3-2: Limits – Limits for harmonic current emissions (equipment input current ≤16 A per phase)
• 5. M ü l l e r G . : Betriebsverhalten rotierender elektrischer Maschinen. 2nd Edition, Berlin, Offenbach: VDE-Verlag, 1990
• 6. S c h o s t a n S . H , D e t t m a n n K . D . S c h u l z D . a n d P l o t k i n J . : Investigation of an Atypical Sixth Harmonic Current Level of a 5-MW Wind Turbine Configuration. In Proc. of IEEE Region 8 EUROCON 2007, Warsaw, Poland