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Current waveform distortion of doubly‐fed generator for wind turbine application by spatial higher harmonics
Author(s) -
Nishihama Kazuo,
Ide Kazumasa,
Fujigaki Tetsuo,
Mizutani Shuji,
Iizuka Motonobu
Publication year - 2009
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.20606
Subject(s) - harmonics , armature (electrical engineering) , total harmonic distortion , waveform , harmonic analysis , shunt generator , electrical engineering , physics , harmonic , acoustics , generator (circuit theory) , distortion (music) , electromagnetic coil , engineering , electronic engineering , voltage , power (physics) , amplifier , cmos , quantum mechanics
This paper describes a method to analyze higher harmonic currents resulting from higher space harmonics, depending on the winding pattern of a doubly‐fed generator. A 1.5‐MW generator was used for the analysis, and the results are compared using finite element magnetic field analysis and measurements. The result revealed that the proposed analysis, which focuses on the winding pattern and takes into account higher space harmonics, allows us to calculate higher harmonic currents at high precision, understand the mechanism of changing higher harmonic currents due to the slip or the load of the generator and considerably reduce higher harmonic currents at the armature by restricting higher harmonic currents at the magnetic field. In addition, the sensitivity analysis of design parameters clarified the relationship between current distortion and basic characteristics on electric designs. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 167(2): 79–85, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20606