A Synchronous Sampling Based Harmonic Analysis Strategy for Marine Current Turbine Monitoring System under Strong Interference Conditions

Milu Zhang, Tianzhen Wang, Tianhao Tang, Zhuo Liu and Christophe Claramunt
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Milu Zhang: Department of Electrical Automation, Shanghai Maritime University, No.1550 Haigang Avenue, Shanghai 201306, China
Tianzhen Wang: Department of Electrical Automation, Shanghai Maritime University, No.1550 Haigang Avenue, Shanghai 201306, China
Tianhao Tang: Department of Electrical Automation, Shanghai Maritime University, No.1550 Haigang Avenue, Shanghai 201306, China
Zhuo Liu: Department of Electrical Automation, Shanghai Maritime University, No.1550 Haigang Avenue, Shanghai 201306, China
Christophe Claramunt: Department of Electrical Automation, Shanghai Maritime University, No.1550 Haigang Avenue, Shanghai 201306, China

Energies, 2019, vol. 12, issue 11, 1-13

Abstract: Affected by high density, non-uniform, and unstructured seawater environment, fault detection of Marine Current Turbine (MCT) faces various fault features and strong interferences. To solve these problems, a harmonic analysis strategy based on zero-crossing estimation and Empirical Mode Decomposition (EMD) filter banks is proposed. First, the detection problems of rotor imbalance fault under strong interference conditions are described through an analysis of the fault mechanism and operation environment of MCT. Therefore, against various fault features, a zero-crossing estimation is proposed to calculate instantaneous frequency. Last, and in order to solve the problem that the frequency and amplitude of the operating parameters are partially or completely covered by interference, a band-pass filter based on EMD is used, together with a characteristic frequency selected by a Pearson correlation coefficient. This strategy can accurately detect the multiplicative faults under strong interference conditions, and can be applied to the MCT fault detection system. Theoretical and experimental results verify the effectiveness of the proposed strategy.

Keywords: marine current turbine; multiplicative fault detection; zero-crossing estimation; EMD-based filter bank (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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