Jiajia Wei, Tao Xie, Tianzhen Wang
Oct 18, 2020
IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society
Marine current turbine (MCT) has been vigorously developed by many countries in the world because of its own advantages. However, the blade imbalance fault is the result of the marine biological attachments that will easily affect the efficiency of MCT. In this paper, a novel VMD denoising method is employed to detect the MCT blade imbalance fault. Firstly, the Hilbert transform (HT) is used to get the instantaneous frequency of the stator current. Then, the instantaneous frequency is broken up into several intrinsic mode functions (IMF) components by variational mode decomposition (VMD). And the objective IMF is selected by the maximal information coefficient (MIC). Finally, the PSD analysis is used to detect the imbalance fault. The effectiveness of the proposed method for fault detection is validated by experimental results.