Electrical & mechanical diagnostic indicators of wind turbine induction generator rotor faults
Yükleniyor...
Dosyalar
Tarih
2019
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In MW-sized wind turbines, the most widely-used generator is the wound rotor induction machine, with a partially-rated voltage source converter connected to the rotor. This generator is a significant cause of wind turbine fault modes. In this paper, a harmonic time-stepped generator model is applied to derive wound rotor induction generator electrical & mechanical signals for fault measurement, and propose simple closed-form analytical expressions to describe them. Predictions are then validated with tests on a 30 kW induction generator test rig. Results show that generator rotor unbalance produces substantial increases in the side-bands of supply frequency and slotting harmonic frequencies in the spectra of current, power, speed, mechanical torque and vibration measurements. It is believed that this is the first occasion in which such comprehensive approach has been presented for this type of machine, with healthy & faulty conditions at varying loads and rotor faults. Clear recommendations of the relative merits of various electrical & mechanical signals for detecting rotor faults are given, and reliable fault indicators are identified for incorporation into wind turbine condition monitoring systems. Finally, the paper proposes that fault detectability and reliability could be improved by data fusion of some of these electrical & mechanical signals. (C) 2018 The Authors. Published by Elsevier Ltd.
Açıklama
Mohammed, Anees/0000-0003-3281-7878; Zappala', Donatella/0000-0002-8283-5102; Crabtree, Christopher/0000-0003-0109-5323
WOS: 000449892600002
WOS: 000449892600002
Anahtar Kelimeler
Wind turbine, Condition monitoring, Doubly-fed induction generator (DFIG), Electrical & mechanical signature analysis, Rotor electrical unbalance, Fault indicator
Kaynak
Renewable Energy
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
131
